Goldstone Radar Observations Planning: (456537) 2007 BG, 1999 RM45, 2015 BY310, 2021 CF6, 2021 DE, and 2021 DW1


Background


1999 RM45
1999 RM45 was discovered on September 14, 1999 at the Lincoln Laboratory ETS (LINEAR) in New Mexico.
Spitzer "ExploreNEOs" observations from 2009 suggest that the object is 0.315 km +0.126 -0.064 km in diameter,
corresponding to an optical albedo of ~0.24.

In Feb. 2021, Pravec et al. reported that 1999 RM45 is a binary system with a primary rotation period
of 3.07 h and a secondary orbital period of 16.445 h.  The lightcurve amplitude of only 0.07 mag for the primary 
indicates a shape with a low elongation and the depth of the dip during eclipses and occultations suggests a diameter
ratio Dsecondary/Dprimary of about 0.45.  

Due to the estimated diameters and rotation period, we are expecting
a bandwidth of about 10 Hz for the primary and about 1 Hz for the secondary. 

1999 RM45 will approach within 0.020 au, or ~7.8 lunar distances, on March 2, 2021 when it will
be an excellent target for high-resolution radar imaging.  Goldstone observations are scheduled
on six tracks from Feb. 27 - Mar. 7.  Radar observations are also scheduled on March 1 and 2 at
Canberra using DSS-36 and DSS-34 to transmit 7190 MHz and the ATCA to receive.

1999 RM45 will also be an excellent optical target in late February when it becomes brighter than 14th magnitude.
However, it will be relatively close to the nearly full Moon, so this may impact the optical obeservations.

1999 RM45 has been classified as a "Potentially Hazardous Asteroid" (PHA) by the IAU's Minor Planet Center.


2007 BG    
(456537) 2007 BG was discovered on January 18, 2007 by the Siding Spring Survey in Australia.
This object makes a relatively close approach within 0.035 au (13.6 lunar distances) on February 26, 2021,
when it will be a weak radar target at Goldstone. The NEOWISE team (Nugent et al., AJ 2015) reported a
diameter of ~310 m and a moderately bright optical albedo of ~0.24. The albedo excludes dark taxonomic classes 
and its size makes it unlikely that the rotation period is more rapid than 2 hours. 

2007 BG's orbit has a moderate eccentricity (e = 0.33) and inclination (i = 12.7 deg) and 2021 is the closest approach
until an encounter within 0.072 au in 2051. 2007 BG becomes a daytime object in early February, so it is unlikely 
that lightcurves will be available before the radar observations.  


2015 BY310
(535844) 2015 BY310 was discovered on January 18, 2015 by Pan-STARRS 1 at Haleakala.
Its absolute magnitude of 21.7 suggests a size within a factor of two of ~140 m. 
Pravec et al. (2019) reported a very rapid rotation period of only 5.56 minutes,
which is exceptionally fast for an object of this size, and a 0.7 mag lightcurve amplitude, 
which implies an elongated shape.   Perna et al. (2018) reported an Sr spectral class.

This asteroid will be barely detectable at Goldstone if the rapid period is correct, which
would produce an echo with a bandwidth of ~150 Hz (!).
The tracks overlap time scheduled for 1999 RM45 and Apophis,
so the observing time will still be used even if 2015 BY310 is too weak to detect.
We did not know about the extremely rapid rotation period when time for this object was requested years ago.

2015 BY310 will make a number of close approaches over the next ten years (see the animation below):
2021 Mar 10  0.036 au
2023 Mar  7  0.027 au
2025 Mar  5  0.025 au
2027 Mar  4  0.024 au
2029 Mar  2  0.025 au
2031 Mar  2  0.053 au 
A similar pattern of of close approaches will start in the late 2100s. 
Due to the repeated close approaches and opportunities for obtaining precise range measurements, 
2015 BY310 will be an excellent target for a Yarkovsky effect detection.

2015 BY310 has been classified as a "Potentially Hazardous Asteroid" (PHA) by the IAU's Minor Planet Center.


2021 CF6

Radar observations on March 9 suggest a diameter of about 60 meters and a rotation period
of roughly 0.1 hour (~6 minutes).


2021 DE 



2021 DW1




Orbital and Physical Characteristics  
Name                     2007 BG                      1999 RM45                           2015 BY310
Asteroid number          456537                       None                                535844
Discoverer               Siding Spring Survey         LINEAR                              Pan-STARRS 1 
Discovery date           2007 Jan 18                  1999 Sep 14                         2015 Jan 18 
orbit type               Aten                         Apollo                              Apollo
Close approach distance  0.057 au                     0.020 au                            0.036 au
Close approach date      2021 Feb 26                  2021 Mar 02                         2021 Mar 10
semimajor axis           0.787 au                     1.681 au                            1.584 au                                  
eccentricity             0.33                         0.64                                0.40
inclination              12.7 deg                     10.89 deg                           4.86 deg 
Orbital period           0.70 years                   2.18 years                          1.99 years                
perihelion distance      0.526 au                     0.598 au                            0.951 au
aphelion distance        1.047 au                     2.762 au                            2.218 au
MOID                     0.052 au                     0.0027 au                           0.0233 au
absolute magnitude (H)   19.5                         19.4                                21.7  
diameter                 0.308+/-0.108 km (NEOWISE)   0.315,+0.126/-0.064 km (SPITZER)    unknown 
optical albedo           0.242+/-0.186 (NEOWISE)      0.238,+0.142,-0.121    (SPITZER)    unknown
rotation period          unknown                      3.0697 h, 16.445 h  BINARY          0.09267 h (Pravec et al, 2019)  
lightcurve amplitude     unknown                      0.07 mag                            0.7 mag   (Pravec et al., 2019)
pole direction           unknown                      unknown                             unknown
spectral class           unknown                      unknown                             Sr        (Perna et al., 2018)
PHA?                     No                           Yes                                 Yes


Name 2021 CF6 2021 DE 2021 DW1 Asteroid number None None None Discoverer Mt. Lemmon Survey Pan-STARRS 2 Pan-STARRS 1 Discovery date 2021 Feb 9 2021 Feb 16 2021 Feb 16 orbit type Apollo Apollo Apollo Close approach distance 0.011 au (4.2 LD) 0.011 au (4.2 LD) 0.0038 au (1.5 LD) Close approach date 2021 Mar 10 2021 Feb 27 2021 Mar 4 semimajor axis 2.076 au 1.387 au 1.317 au eccentricity 0.527 0.759 0.246 inclination 6.9 deg 4.8 deg 7.1 deg Orbital period 2.99 y 1.63 y 1.51 y perihelion distance 0.982 au 0.334 au 0.993 au aphelion distance 3.170 au 1.850 au 1.641 au MOID 0.0079 au 0.0023 au 0.0035 absolute magnitude (H) 23.8 24.3 25.2 diameter ~60 m radar ~50 m ~30 m optical albedo unknown unknown unknown rotation period ~0.1 h radar unknown 25 seconds (Kwiatkowski) lightcurve amplitude unknown unknown 0.2 mag (Kwiatkowski) pole direction unknown unknown unknown spectral class unknown unknown unknown PHA? No No No NHATS Last update: 2021 April 30

Goldstone Radar Images of binary Asteroid 1999 RM45


Delay-Doppler radar images of 1999 RM45 obtained on March 2.
Resolution is 18.75 m x 1 Hz.  In each panel, range increases
down and Doppler frequency increases to the right, so the illumination comes from the
top and rotation is counterclockwise.  In the collage, time increases from the top left
panel to the top right panel, etc., so the last frame in the sequence is at the lower
right.  Each image is an integration spanning eight runs. 
The sequence of images spans about 153 minutes.





Orbital motion of 2015 BY310 shown in a heliocentric reference frame with actual positions of the inner 
solar system planets.  The orbit of 2015 BY310 has relatively lage eccentricity.



  Orbital motion of 2015 BY310 shown in the frame centered on the Sun and rotating with the Earth.
  The asteroid makes a series of close approaches 2020-2030, after which it moves away from Earth until late 2100s when the petal-like patern repeats. 


Discovery M.P.E.C.


1999 RM45
https://minorplanetcenter.net//iau/mpec/J99/J99S08.html

2007 BG
https://minorplanetcenter.net//mpec/K07/K07B18.html

2015 BY310
https://www.minorplanetcenter.net/mpec/K15/K15BA6.html

2021 CF6
https://www.minorplanetcenter.net/mpec/K21/K21CN8.html

2021 DE
https://www.minorplanetcenter.net/mpec/K21/K21D23.html

2021 DW1
https://www.minorplanetcenter.net/mpec/K21/K21D73.html


SNR Calculations

Goldstone SNRs

1999 RM45:  D = 0.31 km,  P = 2.0 h,  OC albedo = 0.1
DOY   start date         window       RA, dec   dist    runs      SNR/day SNR/run
56    2021 Feb 25     02:59-10:47    141,  -7  0.067     229         16     1
57    2021 Feb 26     02:40-10:30    138,  -7  0.056     273         32     2
58    2021 Feb 27     02:16-10:07    133,  -6  0.046     336         74     5   Scheduled 0620-0750 
59    2021 Feb 28     01:40-09:34    125,  -5  0.036     430        190    11   Scheduled 0540-0745 
60    2021 Mar  1     00:43-08:41    113,  -3  0.027     571        580    27   Scheduled 0610-0840 
60-61 2021 Mar  1- 2  23:11-07:17     91,  +1  0.021     750       1600    64   Scheduled 0530-0715 
61-62 2021 Mar  2- 3  21:00-05:27     62,  +6  0.020     837       2100    81
62-63 2021 Mar  3- 4  18:54-03:50     35,  +9  0.024     730       1100    44
63-64 2021 Mar  4- 5  17:31-02:47     18, +10  0.031     569        370    17
64-65 2021 Mar  5- 6  16:41-02:07      8, +10  0.040     445        130     7   Scheduled 2040-0205 
65-66 2021 Mar  6- 7  16:09-01:39      1, +10  0.051     358         55     3   Scheduled 0005-0140 
66-67 2021 Mar  7- 8  15:48-01:20    357, +10  0.062     297         26     2
67-68 2021 Mar  8- 9  15:32-01:04    354, +10  0.073     253         13     1
Pravec et al. report a rotation period of 3.07 h for the 1999 RM45 primary, so
all else being equal, the SNRs will be about 1.2x stronger than shown above.


2007 BG:  D = 0.31 km,  P = 2.0 h,  OC albedo = 0.1
w  DOY    start date       window      RA, dec   dist  runs  SNR/day SNR/run
8  58-59 2021 Feb 27-28  22:25-00:41   33, -33  0.058    71     15      2
8  59-60 2021 Feb 28-01  21:13-01:21   30, -28  0.060   127     20      2   Scheduled 
9  60-61 2021 Mar 01-02  20:24-01:41   28, -23  0.061   157     21      2 
9  61-62 2021 Mar 02-03  19:46-01:53   26, -19  0.063   175     21      2 
9  62-63 2021 Mar 03-04  19:14-02:00   23, -15  0.066   186     19      2
9  63-64 2021 Mar 04-05  18:47-02:04   22, -11  0.069   192     17      1

NOTE: 2007 BG is too far south for Goldstone to observe before February 27.


2015 BY310:  D = 0.14 km,  P = 0.093 h,  OC albedo = 0.1
DOY        start date      window       RA, dec   dist    runs      SNR/day SNR/run
62-63    2021 Mar  3- 4  23:05-07:34    95,  -1  0.045     363          6      0
63-64    2021 Mar  4- 5  23:02-07:06    93,  -5  0.042     366          7      0
64-65    2021 Mar  5- 6  23:00-06:35    90,  -9  0.040     364          8      0 Scheduled 2040-0920 
65-66    2021 Mar  6- 7  23:00-05:59    86, -13  0.039     355          8      0 Scheduled 0005-0855 
66-67    2021 Mar  7- 8  23:02-05:18    82, -18  0.038     338          9      1 Scheduled 0315-0715 
67-68    2021 Mar  8- 9  23:07-04:30    78, -23  0.037     310          9      1 Scheduled 0130-0955 
68-69    2021 Mar  9-10  23:19-03:31    73, -28  0.036     269          8      1 Scheduled 2320-0820 
69-70    2021 Mar 10-11  23:48-02:12    68, -32  0.036     213          6      0


2021 CF6
2021 CF6:  D = 0.06 km,  P = 0.5 h,  OC albedo = 0.1
 start date       window        RA, dec   dist  runs  SNR/day SNR/run
2021 Mar  4- 5  21:33-05:49     71,  -3  0.028   500     22      1
2021 Mar  5- 6  21:10-05:32     67,  -2  0.024   593     42      2  
2021 Mar  6- 7  20:39-05:09     61,   0  0.020   721     87      4  
2021 Mar  7- 8  19:55-04:36     52,  +3  0.016   898    200      7  
2021 Mar  8- 9  18:52-03:46     39,  +7  0.013  1128    450     14  
2021 Mar  9-10  17:23-02:33     20, +12  0.011  1354    820     24* Overlaps BY310 & Apophis.  Use BY310 time
2021 Mar 10-11  15:35-01:02    356, +16  0.011  1428    900     26
2021 Mar 11     13:55-23:38    334, +17  0.012  1291    560     17* Overlaps 2004 FX31. Stronger target than FX31.
2021 Mar 12     12:43-22:35    318, +17  0.015  1075    260      8
2021 Mar 13     11:56-21:50    308, +16  0.019   882    110      4
2021 Mar 14     11:24-21:19    301, +15  0.023   733     55      2
2021 Mar 15     11:02-20:55    296, +14  0.027   621     28      1


2021 DE
2021 DE:  D = 0.05 km,  P = 0.5 h,  OC albedo = 0.1
 start date       window       RA, dec   dist   runs      SNR/day   SNR/run
2021 Feb 26     02:59-12:18   154, +10  0.027    642         23         1
2021 Feb 27     01:40-10:33   132, +13  0.015   1168        235         7
2021 Feb 27-28  22:20-06:20    77, +11  0.011   1624        918        24  Overlaps 1999 RM45 on Feb. 28.
2021 Feb 28- 1  19:10-03:28    32,  +3  0.018    883        109         4  Overlaps 2007 BG (entire track)
2021 Mar  1- 2  18:05-02:24    17,  -1  0.031    497         13         1


2021 DW1
2021 DW1:  D = 0.03 km,  P = 0.5 h,  OC albedo = 0.1
 start date    window       RA, dec   dist   runs      SNR/day   SNR/run 
2021 Feb 26  01:07-07:22   103, -19  0.019    580         29         1
2021 Feb 27  00:59-07:32   104, -17  0.016    719         60         2    
2021 Feb 28  00:51-07:48   105, -14  0.013    931        140         5 *  Attempted during the RM45 track.
2021 Mar  1  00:41-08:13   108, -10  0.011   1287        400        12    
2021 Mar  2  00:30-08:57   113,  -3  0.008   1962       1500        38    
2021 Mar  3  00:18-10:30   122, +12  0.005   3435       8300       150    
2021 Mar  4  00:24-15:08   150, +44  0.004   6093      33000       460    
2021 Mar  5  03:13-19:38   224, +57  0.005   5130      10000       160 
2021 Mar  6  06:35-20:18   252, +48  0.008   3097       1900        37    
2021 Mar  7  07:41-20:27   260, +43  0.011   2155        530        13    
2021 Mar  8  08:09-20:29   265, +39  0.013   1640        200         5
2021 Mar  9  08:24-20:28   267, +37  0.016   1320         88         3    
2021 Mar 10  08:33-20:26   269, +35  0.019   1104         45         1
Update on 2021 March 4: Tomasz Kwiatkowski reports a very fast rotation
period of only 25 seconds, so all else being equal, the SNRs should be 
only about 12% of the values above.  This explains why we did not detect
an echo from 2021 DW1 on February 28.  


Track Assignments


DOY   BOA   BOT   EOT   EOA
58    0450  0620  0750  0820  GSSR AST 1999 RM45    Overlaps Apophis entirely
59    0410  0540  0745  0815  GSSR AST 1999 RM45    Overlaps Apophis entirely
59    2055  2225  2355  0025  GSSR AST 2007 BG
60    0440  0610  0840  0910  GSSR AST 1999 RM45    Overlaps Apophis entirely
60          1100  1540        CSSR AST 1999 RM45    DSS-36/ATCA (S. Horiuchi et al., Australia)
61    0400  0530  0715  0745  GSSR AST 1999 RM45    Overlaps Apophis entirely
61          1035  1550        CSSR AST 1999 RM45    DSS-34/ATCA (S. Horiuchi et al., Australia)
64-65 1910  2040  0920  0950  GSSR AST 1999 RM45, 2015 BY310, and Apophis 
66          0005  0855  0925  GSSR AST 2015 BY310 and APOPHIS.    Overlaps 1999 RM45.
67    0145  0315  0715  0745  GSSR AST 2015 BY310 and APOPHIS  
68    0000  0130  0955  1025  GSSR AST 2015 BY310 and APOPHIS
68-69 2150  2320  0820  0850  GSSR AST 2015 BY310 and APOPHIS  2:25 at the start when BY310 does not overlap

Goldstone tracks:
      UT                   UT          PST                  Duration Round-trip     
DOY   Date                 TX Window   TX Window            hh:mm    time (sec)   SNR/run
58    Feb 27    1999 RM45  0620-0750   2220-2350 Feb 26     1:30       46            5    Start during precal

59    Feb 28    1999 RM45  0540-0745   2140-2345 Feb 27     2:05       36           11    Start during precal; Also 2021 DW1 and DE

59    Feb 28    2007 BG    2225-2355   1425-1555 Feb 28     1:30       59            1    Also 2021 DE

60    Mar  1    1999 RM45  0610-0840   2210-0040 Feb 28- 1  2:30       27           27    Start during precal

60    Mar  1    1999 RM45  1100-1540   0300-0740 Mar  1     4:40                          DSS-36/ATCA (S. Horiuchi et al.)

61    Mar  2    1999 RM45  0530-0715   2130-2315 Mar  1     1:45       21           64    Start during precal

61    Mar  2    1999 RM45  1035-1550   0235-0750 Mar  2     5:15                          DSS-34/ATCA (S. Horiuchi et al.)

64-65 Mar  5- 6 1999 RM45  2040-0205   1240-1805 Mar  5     6:05       40            7    Start during precal
64-65 Mar  5- 6 2015 BY310 2300-0635   1500-2235 Mar  5     7:35       41           <1    Overlaps Apophis.   Also 2021 DW1.

66    Mar  7    1999 RM45  0005-0140   1605-1740 Mar  6     1:35       51            3    Start during precal
66    Mar  7    2015 BY310 0005-0600   1605-2200 Mar  6     5:55       39           <1    Overlaps Apophis

67    Mar  8    2015 BY310 0315-0515   1915-2115 Mar  7     2:00       38           <1    Overlaps Apophis and 2021 CF6

68    Mar  9    2015 BY310 0130-0430   1730-2030 Mar  8     3:00       37           <1    Overlaps Apophis and 2021 CF6

68-69 Mar  9-10 2015 BY310 2320-0330   1520-1930 Mar  9     4:10       36           <1	  Overlaps 2021 CF6 at the start and Apophis later.

70    Mar 11    2004 FX31  1215-1415   0415-0615 Mar 11     2:00       93            2    Overlaps 2021 CF6 20 minutes at the end.



Uncertainties

1999 RM45
JPL/Horizons solution 51, # obs: 242 (1999-2021)
2021 Feb 24
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.            delta POS_3sigma   DOP_X_3sig  RT_delay_3sig
 2021-Feb-25 00:00 *m  142.31928  -7.23605 0.07035061496422      0.604        1.04       0.000977
 2021-Feb-26 00:00 *m  139.17340  -6.86713 0.05925800311135      0.802        1.00       0.000982
 2021-Feb-27 00:00 *   134.62938  -6.28230 0.04844687162499      1.184        1.44       0.000982 *
 2021-Feb-28 00:00 *   127.59953  -5.28393 0.03812828748010      2.000        4.01       0.000964 *
 2021-Mar-01 00:00 *   115.79962  -3.41646 0.02880702069494      3.865       12.71       0.000895 *
 2021-Mar-02 00:00 *    94.94210   0.21218 0.02177662509415      7.740       37.15       0.000673 *
 2021-Mar-03 00:00 *    63.40666   5.48551 0.01965565206284     11.063       60.88       0.000204
 2021-Mar-04 00:00 *    34.41919   8.88778 0.02379500472060      8.829       40.62       0.000383
 2021-Mar-05 00:00 *    16.81059   9.89152 0.03184863197247      5.747       20.10       0.000655
 2021-Mar-06 00:00 *     6.79995  10.04922 0.04161609836726      3.901       10.84       0.000795 *
 2021-Mar-07 00:00 *     0.69316   9.98816 0.05216030362208      2.857        6.78       0.000876 *
 2021-Mar-08 00:00 *   356.66425   9.87618 0.06311259382030      2.228        4.81       0.000930
 2021-Mar-09 00:00 *   353.83402   9.75748 0.07431403287422      1.822        3.78       0.000970
 2021-Mar-10 00:00 *   351.74842   9.64324 0.08568970363966      1.543        3.21       0.001004

- - - - - - - - - - 

JPL/Horizons solution 41, # obs: 121 (1999-2021)
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.            delta POS_3sigma   DOP_X_3sig  RT_delay_3sig
 2021-Feb-25 00:00 *m  142.31930  -7.23618 0.07035045821079      1.901        2.89       0.001189
 2021-Feb-26 00:00 *m  139.17340  -6.86728 0.05925784158520      2.244        3.43       0.001206
 2021-Feb-27 00:00 *   134.62937  -6.28249 0.04844670529890      2.758        4.37       0.001221  
 2021-Feb-28 00:00 *   127.59948  -5.28417 0.03812811747811      3.654        6.75       0.001224  
 2021-Mar-01 00:00 *   115.79948  -3.41676 0.02880685272949      5.571       15.20       0.001180  
 2021-Mar-02 00:00 *    94.94176   0.21181 0.02177648168577      9.838       42.44       0.000985  
 2021-Mar-03 00:00 *    63.40610   5.48512 0.01965558441460     14.138       73.54       0.000536
 2021-Mar-04 00:00 *    34.41871   8.88743 0.02379502768876     11.987       52.67       0.000493
 2021-Mar-05 00:00 *    16.81027   9.89124 0.03184871082481      8.306       27.74       0.000752
 2021-Mar-06 00:00 *     6.79973  10.04900 0.04161620820534      5.922       15.71       0.000917  
 2021-Mar-07 00:00 *     0.69300   9.98798 0.05216043268959      4.491       10.14       0.001020  
 2021-Mar-08 00:00 *   356.66412   9.87603 0.06311273645027      3.585        7.32       0.001092
 2021-Mar-09 00:00 *   353.83392   9.75735 0.07431418610129      2.975        5.78       0.001147
 2021-Mar-10 00:00 *   351.74834   9.64312 0.08568986579840      2.540        4.87       0.001193


2007 BG
JPL/Horizons solution 54, # obs: 155 (2007-2021)
2021 Feb 23
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.            delta POS_3sigma   DOP_X_3sig  RT_delay_3sig
 2021-Feb-20 00:00 *m   76.95757 -63.63865 0.06678507503970      0.828       1.79       0.000480
 2021-Feb-21 00:00 *m   69.05426 -61.39586 0.06416360248473      0.932       1.88       0.000475
 2021-Feb-22 00:00 *m   61.79466 -58.53871 0.06190942277895      1.053       2.07       0.000466
 2021-Feb-23 00:00 *m   55.29242 -55.10742 0.06006837155993      1.188       2.36       0.000453
 2021-Feb-24 00:00 *m   49.56437 -51.17348 0.05868428683409      1.333       2.74       0.000436
 2021-Feb-25 00:00 *m   44.56430 -46.83390 0.05779546377214      1.478       3.17       0.000415
 2021-Feb-26 00:00 *m   40.21476 -42.20462 0.05743089149207      1.615       3.59       0.000391
 2021-Feb-27 00:00 *    36.42914 -37.41197 0.05760704492710      1.734       3.97       0.000363
 2021-Feb-28 00:00 *    33.12409 -32.58222 0.05832604534359      1.828       4.26       0.000333 
 2021-Mar-01 00:00 *    30.22516 -27.83073 0.05957570594158      1.893       4.43       0.000304
 2021-Mar-02 00:00 *    27.66847 -23.25322 0.06133143659786      1.927       4.49       0.000277
 2021-Mar-03 00:00 *    25.40040 -18.92078 0.06355945675425      1.933       4.46       0.000255
 2021-Mar-04 00:00 *    23.37642 -14.87917 0.06622050539600      1.915       4.34       0.000238
 2021-Mar-05 00:00 *    21.55974 -11.15155 0.06927330587204      1.879       4.18       0.000230


2015 BY310 
JPL/Horizons solution 57,  # obs: 217 (2015-2021)
Date__(UT)__HR:MN     R.A._(a-appar)_DEC.  delta                POS_3sigma   DOP_X_3sig  RT_delay_3sig
 2021-Mar-01 00:00 *   102.66299   8.08020 0.05351739091901         0.701         0.72       0.000309
 2021-Mar-02 00:00 *   100.61707   5.47431 0.05051329283580         0.747         0.77       0.000311
 2021-Mar-03 00:00 *    98.36223   2.54397 0.04769288698241         0.805         0.86       0.000312
 2021-Mar-04 00:00 *    95.86598  -0.74131 0.04508844490467         0.878         1.01       0.000312
 2021-Mar-05 00:00 *    93.09127  -4.40338 0.04273766614229         0.970         1.22       0.000309
 2021-Mar-06 00:00 *    89.99665  -8.44746 0.04068313207079         1.082         1.51       0.000304
 2021-Mar-07 00:00 *    86.53706 -12.85177 0.03897069193579         1.214         1.87       0.000295
 2021-Mar-08 00:00 *    82.66592 -17.55678 0.03764641406654         1.359         2.28       0.000283
 2021-Mar-09 00:00 *    78.33907 -22.45776 0.03675203933376         1.507         2.71       0.000267
 2021-Mar-10 00:00 *    73.52134 -27.40576 0.03631950346221         1.643         3.09       0.000249
 2021-Mar-11 00:00 *    68.19622 -32.22098 0.03636584684941         1.753         3.38       0.000228
 2021-Mar-12 00:00 *m   62.37798 -36.71760 0.03689018760192         1.826         3.55       0.000207
 2021-Mar-13 00:00 *m   56.12374 -40.73342 0.03787391863929         1.857         3.58       0.000187
 2021-Mar-14 00:00 *m   49.54046 -44.15454 0.03928403843010         1.849         3.49       0.000171
 2021-Mar-15 00:00 *m   42.78121 -46.92768 0.04107833538560         1.808         3.31       0.000159
 2021-Mar-16 00:00 *m   36.02765 -49.05830 0.04321075656849         1.744         3.08       0.000153
 2021-Mar-17 00:00 *m   29.46242 -50.59809 0.04563573301536         1.665         2.82       0.000151
 2021-Mar-18 00:00 *m   23.24111 -51.62720 0.04831099079839         1.578         2.56       0.000154
 2021-Mar-19 00:00 *m   17.47388 -52.23696 0.05119896565619         1.489         2.31       0.000160
 2021-Mar-20 00:00 *m   12.22077 -52.51663 0.05426720258052         1.401         2.08       0.000167


2021 CF6
JPL/Horizons solution 18, # obs: 107 (25 days)
2021 Mar  9
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.            delta POS_3sigma  DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2021-Mar-01 00:00 *    79.98715  -5.61601 0.04669652229207      0.806      346.00     1257.50       0.126512
 2021-Mar-02 00:00 *    78.53938  -5.19129 0.04208400408615      0.823      344.57     1252.33       0.113975
 2021-Mar-03 00:00 *    76.74252  -4.65670 0.03749554165307      0.824      342.20     1243.71       0.101505
 2021-Mar-04 00:00 *    74.45216  -3.96617 0.03294735205060      0.811      338.34     1229.67       0.089146
 2021-Mar-05 00:00 *    71.43864  -3.04582 0.02846519895956      0.808      332.00     1206.65       0.076969
 2021-Mar-06 00:00 *    67.31881  -1.77241 0.02409272114168      0.927      321.32     1167.81       0.065093
 2021-Mar-07 00:00 *    61.42242   0.06545 0.01990941871782      1.498      302.40     1099.06       0.053737
 2021-Mar-08 00:00 *    52.54247   2.82077 0.01607123150529      3.096      266.83      969.78       0.043335
 2021-Mar-09 00:00 *    38.63366   6.94137 0.01289792434799      6.570      197.29      717.06       0.034770
 2021-Mar-10 00:00 *    17.55667  12.21727 0.01098894933044     11.877       72.56      263.71       0.029695 *
 2021-Mar-11 00:00 *   351.75905  16.27284 0.01102669058806     14.812       86.46      314.22       0.029951
 2021-Mar-12 00:00 *m  329.64092  17.23778 0.01299529395614     13.121      206.21      749.45       0.035434
 2021-Mar-13 00:00 *m  314.79053  16.52527 0.01620447186651     10.634      272.03      988.70       0.044245
Pointing and Doppler uncertainties are good.

JPL/Horizons solution 12, # obs: 62 (17 days)   OCC = 8
2021 Feb 26
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.            delta POS_3sigma  DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2021-Mar-01 00:00 *    79.98714  -5.61591 0.04668828861383      4.125      799.91     2907.24       0.305087
 2021-Mar-02 00:00 *    78.53934  -5.19117 0.04207647585277      6.478      797.01     2896.68       0.276129
 2021-Mar-03 00:00 *    76.74242  -4.65654 0.03748871633792     10.141      792.15     2879.02       0.247318
 2021-Mar-04 00:00 *    74.45199  -3.96597 0.03294122560856     15.896      784.30     2850.49       0.218744
 2021-Mar-05 00:00 *    71.43834  -3.04555 0.02845976525490     25.177      771.66     2804.55       0.190548
 2021-Mar-06 00:00 *    67.31828  -1.77202 0.02408797124182     40.737      750.94     2729.25       0.162962
 2021-Mar-07 00:00 *    61.42148   0.06603 0.01990534031897     68.037      715.78     2601.47       0.136381
 2021-Mar-08 00:00 *    52.54077   2.82166 0.01606780953050    117.575      653.40     2374.77       0.111529
 2021-Mar-09 00:00 *    38.63056   6.94272 0.01289514379975    203.624      539.03     1959.07       0.089802
 2021-Mar-10 00:00 *    17.55161  12.21892 0.01098678079289    311.116      338.20     1229.17       0.074069 *
 2021-Mar-11 00:00 *   351.75313  16.27400 0.01102497499223    342.199      170.18      618.49       0.069241
 2021-Mar-12 00:00 *m  329.63604  17.23824 0.01299366699148    273.533      394.99     1435.57       0.077696
 2021-Mar-13 00:00 *m  314.78701  16.52540 0.01620258868440    196.187      579.33     2105.53       0.095607

JPL/Horizons solution 8, # obs: 47 (13 days), OCC = 8
2021 Feb 22
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.            delta POS_3sigma  DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2021-Mar-01 00:00 *    79.98704  -5.61592 0.04670424546464     16.661     1144.92     4161.15       0.462877
 2021-Mar-02 00:00 *    78.53922  -5.19117 0.04209085027324     24.787     1141.75     4149.64       0.421504
 2021-Mar-03 00:00 *    76.74229  -4.65655 0.03750151754055     36.947     1136.37     4130.09       0.380312
 2021-Mar-04 00:00 *    74.45184  -3.96597 0.03295246858388     55.610     1127.78     4098.86       0.339407
 2021-Mar-05 00:00 *    71.43815  -3.04554 0.02846947431830     85.259     1114.44     4050.39       0.298941
 2021-Mar-06 00:00 *    67.31806  -1.77201 0.02409618663981    134.420     1094.02     3976.15       0.259131
 2021-Mar-07 00:00 *    61.42120   0.06605 0.01991213138891    219.869     1063.16     3864.02       0.220292
 2021-Mar-08 00:00 *    52.54040   2.82169 0.01607330243508    373.453     1018.26     3700.83       0.182845
 2021-Mar-09 00:00 *    38.63010   6.94276 0.01289957953436    637.084      955.31     3472.03       0.147411
 2021-Mar-10 00:00 *    17.55114  12.21891 0.01099060796969    959.441      823.18     2991.82       0.116172
 2021-Mar-11 00:00 *   351.75289  16.27391 0.01102886039209   1039.083      476.26     1730.96       0.097835
 2021-Mar-12 00:00 *m  329.63612  17.23814 0.01299825226702    815.794      440.23     1599.98       0.101616
 2021-Mar-13 00:00 *m  314.78728  16.52534 0.01620828402863    572.931      733.60     2666.22       0.122577


2021 DE
JPL/Horizons solution 9, # obs: 63 (11 days)
2021 Feb 28
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.            delta POS_3sigma  DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2021-Feb-25 00:00 *m  163.74472   8.43849 0.04618025132511      0.710     2376.14     8635.98       0.271332
 2021-Feb-26 00:00 *m  157.42083   9.57229 0.03171943320145      0.969     2295.08     8341.37       0.186278
 2021-Feb-27 00:00 *   141.09003  11.91330 0.01828452463959      1.955     1969.26     7157.19       0.107294
 2021-Feb-28 00:00 *    84.37092  12.20500 0.01075803853806      6.122       68.73      249.79       0.063249
 2021-Mar-01 00:00 *    31.20838   2.36654 0.01870208219069      3.222     1995.02     7250.82       0.110150 *
 2021-Mar-02 00:00 *    16.03634  -1.30238 0.03219764870722      2.128     2298.39     8353.38       0.189520
 2021-Mar-03 00:00 *     9.99715  -2.74960 0.04666781558054      1.912     2375.75     8634.54       0.274597
 2021-Mar-04 00:00 *     6.81573  -3.49819 0.06144854876707      1.815     2408.68     8754.24       0.361497
 2021-Mar-05 00:00 *     4.85491  -3.95222 0.07638466272144      1.716     2429.03     8828.19       0.449321

JPL/Horizons solution 8, # obs: 53 (10 days)
2021 Feb 27
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.            delta POS_3sigma  DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2021-Feb-25 00:00 *m  163.74472   8.43849 0.04617552365780      0.837     2639.89     9594.55       0.301250
 2021-Feb-26 00:00 *m  157.42083   9.57229 0.03171619313693      1.095     2549.88     9267.42       0.206755
 2021-Feb-27 00:00 *   141.09005  11.91328 0.01828266531126      2.767     2187.50     7950.38       0.119007
 2021-Feb-28 00:00 *    84.37104  12.20498 0.01075693846710     15.098       86.04      312.71       0.070173
 2021-Mar-01 00:00 *    31.20844   2.36652 0.01870014616182      8.384     2218.72     8063.82       0.122452 *
 2021-Mar-02 00:00 *    16.03636  -1.30239 0.03219432115133      4.280     2554.08     9282.67       0.210674
 2021-Mar-03 00:00 *     9.99716  -2.74961 0.04666299914393      3.013     2639.65     9593.67       0.305206
 2021-Mar-04 00:00 *     6.81574  -3.49820 0.06144221217338      2.491     2676.11     9726.20       0.401756
 2021-Mar-05 00:00 *     4.85491  -3.95223 0.07637679005377      2.199     2698.66     9808.15       0.499329

JPL/Horizons solution 7, # obs: 39 (9 days)    Arc isn't any longer, but 5 more measurements relative to s6.
2021 Feb 26
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.            delta POS_3sigma  DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2021-Feb-25 00:00 *m  163.74469   8.43851 0.04620540178958      1.102     2821.53    10254.72       0.322057
 2021-Feb-26 00:00 *m  157.42095   9.57229 0.03173700125502      2.782     2725.33     9905.09       0.221071
 2021-Feb-27 00:00 *   141.09101  11.91322 0.01829500369485     15.872     2338.25     8498.25       0.127303
 2021-Feb-28 00:00 *    84.37587  12.20557 0.01076395607769     75.954      173.20      629.49       0.075029 *
 2021-Mar-01 00:00 *    31.21075   2.36713 0.01871133175403     37.068     2371.16     8617.88       0.130873 **
 2021-Mar-02 00:00 *    16.03747  -1.30209 0.03221378841150     17.187     2729.69     9920.94       0.225155
 2021-Mar-03 00:00 *     9.99787  -2.74941 0.04669148003723     10.765     2821.22    10253.60       0.326183
 2021-Mar-04 00:00 *     6.81627  -3.49806 0.06147993155879      7.922     2860.22    10395.35       0.429372
 2021-Mar-05 00:00 *     4.85534  -3.95211 0.07642385718038      6.375     2884.34    10482.99       0.533656
Pointing late on Feb. 28 is now good enough to try this.

JPL/Horizons solution 5, # obs: 24 (8 days) OCC = 9
2021 Feb 24
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.            delta POS_3sigma  DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2021-Feb-25 00:00 *m  163.74510   8.43838 0.04617746032711      4.854     3417.52    12420.83       0.381290
 2021-Feb-26 00:00 *m  157.42305   9.57186 0.03172053940840     20.218     3296.66    11981.55       0.259274
 2021-Feb-27 00:00 *   141.10198  11.91181 0.01828866112257    101.592     2786.62    10127.84       0.146776
 2021-Feb-28 00:00 *    84.42322  12.21030 0.01075737671199    436.206      910.47     3309.05       0.089030 *
 2021-Mar-01 00:00 *    31.23140   2.37190 0.01869067439008    198.813     2971.10    10798.34       0.165233 **
 2021-Mar-02 00:00 *    16.04655  -1.29999 0.03218077186308     87.572     3330.21    12103.51       0.281093
 2021-Mar-03 00:00 *    10.00333  -2.74819 0.04664642962203     52.500     3427.26    12456.21       0.403892
 2021-Mar-04 00:00 *     6.82014  -3.49721 0.06142286205587     37.167     3470.26    12612.49       0.529064
 2021-Mar-05 00:00 *     4.85836  -3.95147 0.07635473457436     28.958     3497.78    12712.53       0.655491


2021 DW1
JPL/Horizons solution 6, # obs: 85 (15 days)
2021 Mar 3
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.            delta POS_3sigma  DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2021-Feb-25 00:00 *m  101.64455 -20.15283 0.02295638980596      0.577       75.40      274.05       0.020649
 2021-Feb-26 00:00 *m  102.48762 -18.93095 0.01995016391913      0.655       75.02      272.66       0.017918
 2021-Feb-27 00:00 *   103.63054 -17.26459 0.01695630718958      0.735       74.39      270.35       0.015205
 2021-Feb-28 00:00 *   105.24611 -14.87018 0.01398628688021      0.813       73.28      266.34       0.012522
 2021-Mar-01 00:00 *   107.67575 -11.17087 0.01106347000756      0.879       71.19      258.73       0.009895
 2021-Mar-02 00:00 *   111.69436  -4.83528 0.00824352890318      0.938       66.62      242.12       0.007382
 2021-Mar-03 00:00 *   119.46225   7.62831 0.00568970760587      1.380       54.51      198.12       0.005145
 2021-Mar-04 00:00 *   139.09053  33.65344 0.00397016926152      6.819       19.48       70.81       0.003702
 2021-Mar-05 00:00 *   195.46265  57.83869 0.00426964490314     20.020       33.19      120.63       0.003996 *
 2021-Mar-06 00:00 *   241.12294  52.34531 0.00630215342524     24.924       58.83      213.82       0.005769
 2021-Mar-07 00:00 *   256.05017  45.16324 0.00894683819240     25.926       67.63      245.81       0.008115
 2021-Mar-08 00:00 *   262.41347  40.69959 0.01179221104073     26.237       71.16      258.63       0.010666
 2021-Mar-09 00:00 *   265.85910  37.84117 0.01471756240574     26.394       72.83      264.71       0.013306
 2021-Mar-10 00:00 *   268.00739  35.88686 0.01767929526504     26.501       73.71      267.88       0.015990

JPL/Horizons solution 3, # obs: 21 (10 days)
2021 Feb 27
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.            delta POS_3sigma  DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2021-Feb-25 00:00 *m  101.64457 -20.15286 0.02294990953825      1.849      391.05     1421.27       0.111066
 2021-Feb-26 00:00 *m  102.48765 -18.93098 0.01994449500642      2.310      388.99     1413.77       0.096922
 2021-Feb-27 00:00 *   103.63059 -17.26461 0.01695144399552      3.428      385.62     1401.50       0.082880
 2021-Feb-28 00:00 *   105.24619 -14.87018 0.01398222010541      6.463      379.87     1380.61       0.069007 *
 2021-Mar-01 00:00 *   107.67591 -11.17080 0.01106018345636     14.474      369.31     1342.26       0.055433
 2021-Mar-02 00:00 *   111.69470  -4.83499 0.00824099189425     36.764      347.66     1263.56       0.042429
 2021-Mar-03 00:00 *   119.46318   7.62942 0.00568785554485    107.362      297.20     1080.18       0.030648
 2021-Mar-04 00:00 *   139.09427  33.65680 0.00396885497755    308.082      189.80      689.81       0.021754
 2021-Mar-05 00:00 *   195.47465  57.83931 0.00426848904803    393.123      139.59      507.34       0.020354 *
 2021-Mar-06 00:00 *   241.12976  52.34267 0.00630061492010    285.962      278.67     1012.82       0.028091
 2021-Mar-07 00:00 *   256.05426  45.16052 0.00894465749358    225.969      338.85     1231.53       0.039669
 2021-Mar-08 00:00 *   262.41657  40.69704 0.01178929614382    198.272      362.95     1319.11       0.052617
 2021-Mar-09 00:00 *   265.86174  37.83874 0.01471387508911    183.960      374.21     1360.06       0.066153
 2021-Mar-10 00:00 *   268.00979  35.88452 0.01767481698703    175.688      380.09     1381.42       0.079981

JPL/Horizons solution 2, # obs: 15 (8 days)
2021 Feb 24, 26, and 26
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.            delta POS_3sigma  DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2021-Feb-25 00:00 *m  101.64462 -20.15287 0.02293141930883      4.227      515.45     1873.37       0.148120
 2021-Feb-26 00:00 *m  102.48771 -18.93101 0.01992841098464      7.113      512.73     1863.49       0.129568
 2021-Feb-27 00:00 *   103.63066 -17.26466 0.01693774960567     12.820      508.30     1847.39       0.111180
 2021-Feb-28 00:00 *   105.24629 -14.87024 0.01397088745588     24.533      500.79     1820.09       0.093054 *
 2021-Mar-01 00:00 *   107.67604 -11.17086 0.01105116245628     50.477      487.12     1770.41       0.075375
 2021-Mar-02 00:00 *   111.69496  -4.83495 0.00823418241669    115.448      459.70     1670.75       0.058490
 2021-Mar-03 00:00 *   119.46393   7.63008 0.00568302355433    304.328      402.46     1462.71       0.043029
 2021-Mar-04 00:00 *   139.09809  33.66009 0.00396536798771    783.751      370.45     1346.39       0.029967
 2021-Mar-05 00:00 *   195.49155  57.84020 0.00426494573050    870.800      305.10     1108.88       0.026806 *
 2021-Mar-06 00:00 *   241.14211  52.33800 0.00629564149408    541.738      371.78     1351.23       0.037428
 2021-Mar-07 00:00 *   256.06283  45.15495 0.00893767071625    378.856      445.20     1618.07       0.052584
 2021-Mar-08 00:00 *   262.42365  40.69134 0.01178008558137    307.941      477.28     1734.64       0.069439
 2021-Mar-09 00:00 *   265.86809  37.83304 0.01470235094979    273.041      492.54     1790.10       0.087102
 2021-Mar-10 00:00 *   268.01573  35.87883 0.01766093502537    253.675      500.54     1819.19       0.105191
Pointing is already good enough to detect it during the Feb. 28 1999 RM45 track.

JPL/Horizons solution 1
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.            delta POS_3sigma  DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2021-Feb-25 00:00 *m  101.64473 -20.15223 0.02295627947375     32.261     1506.96     5476.99       0.350928
 2021-Feb-26 00:00 *m  102.48800 -18.92992 0.01994917468002     55.185     1498.00     5444.41       0.297233
 2021-Feb-27 00:00 *   103.63130 -17.26282 0.01695445107963     96.230     1482.45     5387.90       0.244334
 2021-Feb-28 00:00 *   105.24762 -14.86699 0.01398358896242    174.239     1453.42     5282.40       0.192832 *
 2021-Mar-01 00:00 *   107.67885 -11.16473 0.01105998926184    336.327     1392.30     5060.23       0.143982
 2021-Mar-02 00:00 *   111.70129  -4.82215 0.00823943033318    718.580     1238.34     4500.68       0.100585
 2021-Mar-03 00:00 *   119.48055   7.66049 0.00568556992155   1757.190      783.98     2849.35       0.067828
 2021-Mar-04 00:00 *   139.15551  33.72379 0.00396822237402   4105.835     1392.86     5062.30       0.052488
 2021-Mar-05 00:00 *   195.62623  57.85332 0.00427282482415   3882.763     2133.78     7755.14       0.101953 *
 2021-Mar-06 00:00 *   241.18932  52.32387 0.00630852375222   1861.209     1646.01     5982.33       0.165750
 2021-Mar-07 00:00 *   256.07846  45.14752 0.00895487970028    942.089     1525.96     5546.02       0.221646
 2021-Mar-08 00:00 *   262.42934  40.68889 0.01180145345562    573.942     1503.91     5465.90       0.275785
 2021-Mar-09 00:00 *   265.86955  37.83349 0.01472784012140    431.343     1500.18     5452.34       0.329769
 2021-Mar-10 00:00 *   268.01499  35.88107 0.01769053662955    384.905     1499.68     5450.51       0.383874


Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination: 1999 RM45 JPL/Horizons solution 38 Date__(UT)__HR:MN R.A._(a-appar)_DEC. APmag delta S-O-T /r T-O-M/MN_Illu% 2021-Feb-10 00:00 153.98993 -7.63742 17.794 0.24944454419283 155.8162 /L 135.0/ 4.1220 2021-Feb-11 00:00 153.77581 -7.70086 17.650 0.23689228097724 156.5312 /L 145.7/ 1.0151 2021-Feb-12 00:00 153.53225 -7.75804 17.501 0.22443221664729 157.2220 /L 154.0/ 0.2182 2021-Feb-13 00:00 153.25531 -7.80843 17.347 0.21206265264037 157.8833 /L 157.0/ 1.6532 2021-Feb-14 00:00 152.94011 -7.85136 17.187 0.19978179115986 158.5080 /L 153.4/ 5.1278 2021-Feb-15 00:00 152.58053 -7.88605 17.020 0.18758778978062 159.0876 /L 145.3/ 10.3727 2021-Feb-16 00:00 152.16883 -7.91153 16.846 0.17547883962330 159.6114 /L 135.3/ 17.0806 2021-Feb-17 00:00 151.69499 -7.92655 16.664 0.16345327454411 160.0657 /L 124.5/ 24.9377 2021-Feb-18 00:00 151.14594 -7.92950 16.474 0.15150972558487 160.4330 /T 113.2/ 33.6417 2021-Feb-19 00:00 150.50422 -7.91820 16.274 0.13964734644710 160.6906 /T 101.7/ 42.9066 2021-Feb-20 00:00 149.74611 -7.88968 16.063 0.12786615560391 160.8087 /T 90.0/ 52.4561 2021-Feb-21 00:00 148.83853 -7.83973 15.841 0.11616757675101 160.7474 /T 78.1/ 62.0090 2021-Feb-22 00:00 147.73410 -7.76217 15.606 0.10455532896548 160.4517 /T 66.0/ 71.2614 2021-Feb-23 00:00 146.36262 -7.64755 15.354 0.09303696079209 159.8437 /T 53.7/ 79.8704 2021-Feb-24 00:00 144.61594 -7.48075 15.085 0.08162663478174 158.8080 /T 41.8/ 87.4472 2021-Feb-25 00:00 142.31926 -7.23616 14.795 0.07035050306040 157.1634 /T 31.2/ 93.5650 2021-Feb-26 00:00 139.17337 -6.86726 14.481 0.05925788968933 154.6055 /T 25.9/ 97.7909 2021-Feb-27 00:00 134.62933 -6.28246 14.141 0.04844675742468 150.5800 /T 31.1/ 99.7407 2021-Feb-28 00:00 127.59944 -5.28413 13.788 0.03812817461711 143.9873 /T 46.3/ 99.1482 2021-Mar-01 00:00 115.79945 -3.41671 13.477 0.02880691554209 132.5028 /T 69.5/ 95.9292 2021-Mar-02 00:00 94.94179 0.21186 13.453 0.02177654674710 111.7431 /T 103.1/ 90.2151 2021-Mar-03 00:00 63.40623 5.48517 14.404 0.01965563527390 80.2121 /T 147.9/ 82.3440 2021-Mar-04 00:00 34.41887 8.88747 17. 0.02379505109823 51.6705 /T 168.3/ 72.8110 2021-Mar-05 00:00 16.81039 9.89128 19. 0.03184871358399 34.7265 /T 138.5/ 62.1991 2021-Mar-06 00:00 6.79983 10.04903 22. 0.04161619837918 25.3972 /T 115.6/ 51.1139 2021-Mar-07 00:00 0.69307 9.98801 23. 0.05216041477205 20.0160 /T 96.6/ 40.1344 2021-Mar-08 00:00 356.66418 9.87606 25. 0.06311271283621 16.7978 /T 79.9/ 29.7847 2021-Mar-09 00:00 353.83397 9.75737 26. 0.07431415814557 14.8813 /T 64.7/ 20.5187 2021-Mar-10 00:00 351.74838 9.64314 27. 0.08568983431974 13.8083 /T 50.6/ 12.7118 2007 BG JPL/Horizons solution 52 Date__(UT)__HR:MN R.A._(a-appar)_DEC. APmag delta S-O-T /r T-O-M/MN_Illu% 2021-Feb-10 00:00 140.03004 -63.07486 17.150 0.10507388881823 102.5186 /T 91.5/ 4.1220 2021-Feb-11 00:00 136.57116 -63.94098 17.082 0.10065661962496 101.7778 /T 94.5/ 1.0151 2021-Feb-12 00:00 132.56581 -64.77211 17.018 0.09631950111751 100.8928 /T 96.3/ 0.2182 2021-Feb-13 00:00 127.92698 -65.53674 16.956 0.09207662818186 99.8451 /T 97.0/ 1.6532 2021-Feb-14 00:00 122.57121 -66.19097 16.899 0.08794437592365 98.6144 /T 96.5/ 5.1278 2021-Feb-15 00:00 116.43676 -66.67590 16.849 0.08394181296689 97.1782 /T 95.1/ 10.3727 2021-Feb-16 00:00 109.51209 -66.91645 16.806 0.08009115112698 95.5121 /T 92.9/ 17.0806 2021-Feb-17 00:00 101.87046 -66.82356 16.774 0.07641820204546 93.5908 /T 90.3/ 24.9377 2021-Feb-18 00:00 93.69591 -66.30181 16.756 0.07295278707328 91.3888 /T 87.6/ 33.6417 2021-Feb-19 00:00 85.27740 -65.26235 16.755 0.06972901195962 88.8825 /T 85.3/ 42.9066 2021-Feb-20 00:00 76.95772 -63.63808 16.775 0.06678527363407 86.0526 /T 83.9/ 52.4561 2021-Feb-21 00:00 69.05461 -61.39529 16.822 0.06416382030942 82.8883 /T 83.9/ 62.0090 2021-Feb-22 00:00 61.79517 -58.53815 16.900 0.06190965805473 79.3908 /T 85.6/ 71.2614 2021-Feb-23 00:00 55.29304 -55.10689 17.017 0.06006862171472 75.5790 /T 89.3/ 79.8704 2021-Feb-24 00:00 49.56507 -51.17298 17.178 0.05868454845800 71.4927 /T 95.3/ 87.4472 2021-Feb-25 00:00 44.56504 -46.83344 17.389 0.05779573267012 67.1945 /T 103.2/ 93.5650 2021-Feb-26 00:00 40.21552 -42.20422 17.651 0.05743116285600 62.7674 /T 112.9/ 97.7909 2021-Feb-27 00:00 36.42990 -37.41163 17.967 0.05760731361807 58.3087 /T 123.8/ 99.7407 2021-Feb-28 00:00 33.12484 -32.58192 18. 0.05832630623723 53.9196 /T 135.0/ 99.1482 2021-Mar-01 00:00 30.22590 -27.83048 19. 0.05957595426510 49.6945 /T 145.2/ 95.9292 2021-Mar-02 00:00 27.66919 -23.25301 19. 0.06133166819083 45.7112 /T 151.7/ 90.2151 2021-Mar-03 00:00 25.40110 -18.92060 20. 0.06355966821420 42.0256 /T 151.1/ 82.3440 2021-Mar-04 00:00 23.37710 -14.87902 20. 0.06622069410759 38.6704 /T 143.6/ 72.8110 2021-Mar-05 00:00 21.56040 -11.15143 21. 0.06927346994688 35.6570 /T 132.4/ 62.1991 2021-Mar-06 00:00 19.92060 -7.74297 21. 0.07267745858866 32.9802 /T 119.7/ 51.1139 2015 BY310 JPL/Horizons solution 57 Date__(UT)__HR:MN R.A._(a-appar)_DEC. APmag delta S-O-T /r T-O-M/MN_Illu% 2021-Feb-20 00:00 115.22151 21.84179 17.939 0.08570085765040 141.7339 /T 49.1/ 52.4561 2021-Feb-21 00:00 114.17208 20.89557 17.880 0.08179694463165 139.9168 /T 36.2/ 62.0090 2021-Feb-22 00:00 113.06014 19.84449 17.820 0.07796072478857 138.0182 /T 23.2/ 71.2614 2021-Feb-23 00:00 111.87794 18.67490 17.759 0.07419572616888 136.0266 /T 10.7/ 79.8704 2021-Feb-24 00:00 110.61634 17.37086 17.698 0.07050685232198 133.9283 /T 8.570/ 87.4472 2021-Feb-25 00:00 109.26451 15.91389 17.638 0.06690069450681 131.7071 /T 21.1/ 93.5650 2021-Feb-26 00:00 107.80968 14.28257 17.580 0.06338591109285 129.3439 /T 35.6/ 97.7909 2021-Feb-27 00:00 106.23679 12.45228 17.523 0.05997367973063 126.8161 /T 50.8/ 99.7407 2021-Feb-28 00:00 104.52815 10.39514 17.471 0.05667822205897 124.0982 /T 66.3/ 99.1482 2021-Mar-01 00:00 102.66299 8.08020 17.424 0.05351739091238 121.1613 /T 82.1/ 95.9292 2021-Mar-02 00:00 100.61707 5.47431 17.385 0.05051329282918 117.9742 /T 97.7/ 90.2151 2021-Mar-03 00:00 98.36223 2.54397 17.358 0.04769288697580 114.5052 /T 113.0/ 82.3440 2021-Mar-04 00:00 95.86598 -0.74131 17.346 0.04508844489814 110.7252 /T 127.1/ 72.8110 2021-Mar-05 00:00 93.09127 -4.40338 17.354 0.04273766613590 106.6131 /T 138.7/ 62.1991 2021-Mar-06 00:00 89.99665 -8.44746 17.390 0.04068313206464 102.1633 /T 144.7/ 51.1139 2021-Mar-07 00:00 86.53706 -12.85177 17.458 0.03897069192996 97.3955 /T 142.3/ 40.1344 2021-Mar-08 00:00 82.66592 -17.55678 17.565 0.03764641406115 92.3650 /T 132.7/ 29.7847 2021-Mar-09 00:00 78.33907 -22.45776 17.716 0.03675203932892 87.1694 /T 119.5/ 20.5187 2021-Mar-10 00:00 73.52134 -27.40576 17.913 0.03631950345803 81.9474 /T 104.9/ 12.7118 2021-Mar-11 00:00 68.19622 -32.22098 18.152 0.03636584684596 76.8654 /T 90.3/ 6.6534 2021-Mar-12 00:00 62.37798 -36.71760 18.428 0.03689018759927 72.0945 /T 76.8/ 2.5401 2021-Mar-13 00:00 56.12374 -40.73342 18.727 0.03787391863745 67.7824 /T 65.5/ 0.4709 2021-Mar-14 00:00 49.54046 -44.15454 19.035 0.03928403842906 64.0331 /T 57.5/ 0.4493 2021-Mar-15 00:00 42.78121 -46.92768 19.336 0.04107833538534 60.8970 /T 54.1/ 2.3931 2021 CF6 JPL/Horizons solution 8 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2021-Feb-20 00:00 86.51547 -7.32094 0.08827750201733 20.873 n.a. 110.8153 /T 36.2/ 52.1906 2021-Feb-21 00:00 86.05613 -7.22529 0.08369031423212 20.795 n.a. 109.5512 /T 31.9/ 61.6210 2021-Feb-22 00:00 85.56179 -7.11413 0.07909329609692 20.712 n.a. 108.2509 /T 31.6/ 70.7852 2021-Feb-23 00:00 85.02375 -6.98525 0.07448667928318 20.624 n.a. 106.9058 /T 35.8/ 79.3567 2021-Feb-24 00:00 84.43099 -6.83573 0.06987113922563 20.530 n.a. 105.5054 /T 43.6/ 86.9580 2021-Feb-25 00:00 83.76940 -6.66169 0.06524788379029 20.430 n.a. 104.0358 /T 53.7/ 93.1655 2021-Feb-26 00:00 83.02057 -6.45795 0.06061877709283 20.323 n.a. 102.4790 /T 65.2/ 97.5363 2021-Feb-27 00:00 82.16018 -6.21741 0.05598651587934 20.209 n.a. 100.8113 /T 77.8/ 99.6610 2021-Feb-28 00:00 81.15535 -5.93026 0.05135489033235 20.087 n.a. 99.0003 /T 91.1/ 99.2361 2021-Mar-01 00:00 79.96068 -5.58263 0.04672919021280 19.957 n.a. 97.0015 /T 104.8/ 96.1371 2021-Mar-02 00:00 78.51162 -5.15438 0.04211687445016 19.818 n.a. 94.7512 /T 118.7/ 90.4644 2021-Mar-03 00:00 76.71349 -4.61551 0.03752873608873 19.671 n.a. 92.1560 /T 132.5/ 82.5449 2021-Mar-04 00:00 74.42206 -3.91972 0.03298103195050 19.519 n.a. 89.0738 /T 145.3/ 72.8856 2021-Mar-05 00:00 71.40808 -2.99283 0.02849957681974 19.368 n.a. 85.2787 /T 154.7/ 62.1001 2021-Mar-06 00:00 67.28937 -1.71127 0.02412806602112 19.236 n.a. 80.3967 /T 155.0/ 50.8328 2021-Mar-07 00:00 61.39800 0.13655 0.01994602340502 19.168 n.a. 73.7826 /T 144.1/ 39.7003 2021-Mar-08 00:00 52.53274 2.90294 0.01610921240575 19.287 n.a. 64.3202 /T 126.1/ 29.2547 2021-Mar-09 00:00 38.66067 7.03257 0.01293642501022 20. n.a. 50.3524 /T 102.2/ 19.9649 2021-Mar-10 00:00 17.65308 12.31181 0.01102421344513 22. n.a. 31.6125 /T 72.4/ 12.2068 * 2021-Mar-11 00:00 351.91601 16.37106 0.01105238867583 25. n.a. 20.0899 /T 43.2/ 6.2572 * 2021-Mar-12 00:00 329.79552 17.33617 0.01300946177869 23. n.a. 30.3368 /L 32.8/ 2.2907 2021-Mar-13 00:00 314.91396 16.61414 0.01621002145638 21. n.a. 42.5859 /L 43.9/ 0.3795 2021-Mar-14 00:00 305.43386 15.58354 0.02006535989158 21. n.a. 51.4594 /L 59.5/ 0.5010 2021-Mar-15 00:00 299.19429 14.66707 0.02426250871332 21. n.a. 57.7942 /L 74.3/ 2.5512 Fortunately the Moon quicky moves away from this object several days before the best days for radar. Prospects for astrometry are good. 2021 DE Solution 5 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2021-Feb-25 00:00 163.70963 8.47225 0.04616107517662 18.054 n.a. 174.6628 /L 35.3/ 93.1655 2021-Feb-26 00:00 157.36692 9.62061 0.03170841860793 17.024 n.a. 177.8968 /T 16.0/ 97.5363 2021-Feb-27 00:00 140.99260 11.99143 0.01828732488524 16.524 n.a. 160.7195 /T 16.5/ 99.6610 2021-Feb-28 00:00 84.29352 12.30944 0.01078737325694 17.000 n.a. 104.4290 /T 85.1/ 99.2361 * 2021-Mar-01 00:00 31.25147 2.44272 0.01872583851823 21. n.a. 50.0388 /T 152.7/ 96.1371 * 2021-Mar-02 00:00 16.07465 -1.25503 0.03221119799343 24. n.a. 33.4531 /T 175.5/ 90.4644 2021-Mar-03 00:00 10.02723 -2.71636 0.04667403759350 26. n.a. 26.2713 /T 156.0/ 82.5449 2021-Mar-04 00:00 6.84021 -3.47278 0.06144863584574 28. n.a. 22.0417 /T 138.4/ 72.8856 2021-Mar-05 00:00 4.87554 -3.93172 0.07637915740502 29. n.a. 19.0760 /T 122.1/ 62.1001 Proximity to the full Moon is a problem! 2021 DW1 JPL/Horizons solution 1 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2021-Feb-24 00:00 100.93108 -21.02100 0.02597497789916 19.486 n.a. 116.7241 /T 47.6/ 86.9580 2021-Feb-25 00:00 101.56201 -20.08129 0.02296244609545 19.212 n.a. 116.9884 /T 50.7/ 93.1655 2021-Feb-26 00:00 102.39367 -18.84861 0.01995602509165 18.895 n.a. 117.5126 /T 55.7/ 97.5363 2021-Feb-27 00:00 103.52123 -17.16794 0.01696204823164 18.517 n.a. 118.4268 /T 62.2/ 99.6610 2021-Feb-28 00:00 105.11507 -14.75372 0.01399203194235 18.056 n.a. 119.9640 /T 69.8/ 99.2361 * 2021-Mar-01 00:00 107.51182 -11.02544 0.01106943685617 17.474 n.a. 122.5735 /T 77.9/ 96.1371 2021-Mar-02 00:00 111.47559 -4.64459 0.00825012588697 16.706 n.a. 127.1893 /T 86.0/ 90.4644 2021-Mar-03 00:00 119.13879 7.89358 0.00569769812143 15.671 n.a. 135.5344 /T 93.1/ 82.5449 2021-Mar-04 00:00 138.55269 34.03642 0.00398002967253 14.680 n.a. 143.1862 /T 94.9/ 72.8856 2021-Mar-05 00:00 195.17621 58.36783 0.00427789168232 15.401 n.a. 122.9865 /L 85.4/ 62.1001 * 2021-Mar-06 00:00 241.31677 52.70277 0.00630750770094 16.836 n.a. 103.8403 /L 76.0/ 50.8328 2021-Mar-07 00:00 256.22760 45.39769 0.00895075391747 17.915 n.a. 94.7862 /L 70.9/ 39.7003 2021-Mar-08 00:00 262.55243 40.87129 0.01179553703388 18.686 n.a. 90.2372 /L 68.8/ 29.2547 2021-Mar-09 00:00 265.97023 37.97629 0.01472071283918 19.264 n.a. 87.7278 /L 69.2/ 19.9649 2021-Mar-10 00:00 268.09893 35.99829 0.01768249140194 19.716 n.a. 86.2711 /L 71.6/ 12.2068

Setups




CW setup:
---------------------------------------------------------------------------
TX polarization           RCP
RCV polarization          LCP & RCP
Frequency hops:           no hopping
Bandwidth:               5000 Hz 
TXoffset                 +500 Hz
FFT                      5000 for 1.0 Hz resolution 

Ranging setups:
---------------------------------------------------------------------------
10-usec
baud             10 usec
code            127
PRP            1270 usec
ncoh              1 
bandwidth       787 Hz   
FFT             128
resolution       6.15 Hz
TXoffset       +100 Hz  (echo in column 80)
---------------------------------------------------------------------------
11-usec 
baud             11 usec
code            127
PRP            1397 usec
ncoh              1 
bandwidth       716 Hz   
FFT             128
resolution      5.6 Hz
TXoffset     +100 Hz  (echo in column 82) 
-------------------------------------------------------------------------
1-usec 
baud              1 usec
code            255
ncoh              8
bandwidth       245 Hz   
FFT             128
resolution        3.8 Hz
TXoffset        +50 Hz  (echo in column 116)
---------------------------------------------------------------------

Instructions

NOTE: Data should be moved to the appropriate subdirectories in aardvark:/export/data0/2007bg/raw/

POINTING:

  OSOD and predicts are on aardvark:



POINTING  

...Not yet available...

Transmit offsets are given in millidegrees.  


PRDX.OUT.14f-14-14.s?? TRANSMITTER: STATION #14, RECEIVER: STATION #14 RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL

2007 BG GOLDSTONE MASTERLOG

============================================================================== ----------------------------------------------------- ...Not yet available... -----------------------------------------------------
Dr. Lance A. M. Benner | PHONE: (818) 354-7412 Mail Stop 183-601 | FAX: (818) 393-4445 Jet Propulsion Laboratory | email: lance.benner@jpl.nasa.gov California Institute of Technology | Plan: To live long and prosper Pasadena, CA 91109-8099 https://echo.jpl.nasa.gov/asteroids/2007BG/2007BG.goldstone.planning.html

Asteroid Radar Astronomy
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