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


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.


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

Last update: 2021 February 24



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


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



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

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

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

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 Apophis and 2021 CF6 at the start



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


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

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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