Goldstone Radar Observations Planning: (175706) 1996FG3 and 2022 HB


Background


(175706) 1996 FG3
(175706) 1996 FG3 was discovered on March 23, 1996 by R. H. McNaught at Siding Spring Observatory.
1996 FG3 is a binary asteroid (Pravec et al. 1998; Mottola and Lahulla 2000) that is the target of
NASA's "Janus" smallsat flyby mission.  This asteroid has also been on the shortlist for the previously 
proposed "BASiX" (NASA) and "Marco Polo-R" (ESA) missions that were not selected.

Radar observations of 1996 FG3 were scheduled at Arecibo twice, first 
in November, 1998, and again in May, 2009, but both opportunities were missed due to equipment problems. 
Extensive radar observations were finally conducted in November-December 2011 at Arecibo and Goldstone.
They revealed a primary with a diameter of about 1.9 km and a secondary with a diameter of about 0.5 km.
The primary has a pronounced ridge near the equator and other, subtle features. 

The primary has a rotation period of 3.59 h (Pravec et al. 2006, Scheirich et al. 2015) and
the secondary has synchronous orbital and rotation periods of 16.15 h. Orbit fitting to radar observtions in 
2011 revealed a system semimajor axis of about 2400 meters and a bulk density of about 0.7 g/cm^3.
Scheirich et al. also found that 1996 FG3 is in a binary YORP equilibrium, meaning that the semimajor axis
of the secondary's orbit is not changing.  For many near-Earth asteroids, the "Binary YORP" effect causes
relatively rapid secular orbital period changes, but that is not happening with 1996 FG3.

Spectroscopy indicates that 1996 FG3 is a C-class (Binzel et al. 2002; Bus and Binzel 2002) object.

1996 FG3 will be a radar imaging target in April and May of 2022, and Goldstone observations are scheduled
from April 25 - May 16.  Time scheduled for 2004 FG11 on April 11 also overlaps 1996 FG3.  Tracks in the
middle of May also overlap time scheduled for 2008 TZ3.

1996 FG3 has been classified as a "Potentially Hazardous Asteroid" by the Minor Planet Center.


2022 HB 2022 HB is a Potentially Hazardous Asteroid discovered by ATLAS-Haleakala on 2022 April 18. This object has an absolute magnitude of 22 that suggests a diameter within a factor of two of 140 meters. The view periods for this asteroid overlap time already scheduled for 1996 FG3 on April 25 and 26. Goldstone echoes obtained on April 25 revealed a narrow bandwidth suggestive of slow rotation with a period possibly in the realm of several tens of hours. Goldstone 1/4 usec ranging on April 26 barely resolved the echo in time delay, so the diameter is almost certainly less than 150 meters. Update: Petr Pravec (pers. comm.) reports a very slow rotation period of 87 h for 2022 HB.
Orbital and Physical Characteristics  
Name                     1996 FG3                  2022 HB
Number                   175706                    Not numbered
Discoverer               R. S. McNaught/AANEAS     ATLAS-Haleakala
Discovery date           1996 March 24             2022 Apr 18
orbit type               Apollo                    Apollo
Close approach dist.     0.0783 au                 0.0262 au
Close approach dist.     30.47 lunar distances     10.2 LD
Close approach date      2022 May 3                2022 Apr 19

semimajor axis           1.054 au                  1.065 au
eccentricity             0.350                     0.382
inclination              2.0 deg                   6.4 deg
Orbital period           1.083 years               1.098 y
perihelion distance      0.685 au                  0.658 au
aphelion distance        1.423 au                  1.472 au
MOID                     0.0283 au                 0.0262 au

absolute magnitude (H)   18.3                      21.97
Primary diameter         1.9 km                   ~0.14 km
Secondary diameter       0.5 km 
optical albedo          ~0.03                      unknown
Primary rotation period  3.594 h                   Slow: tens of hours?  (87 h: P. Pravec pers. comm.)
lightcurve amplitude     0.08 mag (primary)        unknown
Secondary orbital period 16.15 h synchronous
spectral class           C                         unknown
                         PHA, NHATS                PHA
                         Binary                          

Last update: 2022 May 27


Goldstone Radar Echoes from Asteroid 1996 FG3


Echo power spectrum from 1996 FG3 obtained on April 11.
Echo power in standard deviations is plotted as a function of Doppler frequency.
Solid and dashed curves denote opposite-sense circular and same-sense circular polarizations.
The frequency resolution is 5 Hz and the bandwidth of the echo is about 50 Hz.
This echo is from the primary.  The bandwidth matches expectations given the 
primary's diameter of 1.9 km, rotation period of 3.59 h, and a subradar latitude
of -20 degrees. 

The echo was obtained at a distance of 0.146 au and at SNRs that may be
insufficient to show a clear echo from the secondary.  The two spikes on 
the negative side of the echo are consistent with an echo from the satellite but
the SNRs are not strong enough to be sure.

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Echo power spectrum obtained on April 25.  The frequency resolution is 2 Hz.
The broad signal is the echo from the primary and the narrow spike at positive frequencies 
is the echo from the secondary, which was moving toward Earth.


Collage of images from April 25.  In each panel, time delay (range) increases down
and Doppler frequency increases to the right, so rotation and orbital motion are
counterclockwise.  The resolution is 150 m x 3.8 Hz and each panel shows a weighted
sum of 20 runs.  Arrows point to the position of the secondary.

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Echo power spectrum obtained on April 26.  The frequency resolution is 2 Hz.
This spectrum is a weighted sum of 11 transit-receive cycles.  The broad signal
is the echo from the primary and the narrow spike at negative frequencies is the
echo from the secondary, which was moving away from Earth.  


Collage of images from April 26. 
The resolution is 150 m x 3.8 Hz and each panel shows a weighted
sum of 15 runs.  Arrows point to the position of the secondary, whose motion appears
as short streaks in these images, which are time exposures lasting about 45 minutes each.

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Echo power spectrum obtained on April 27 at a frequency resolution of 2 Hz.


Collage of images from April 27.  The resolution is 150 m x 3.8 Hz and each panel 
shows a weighted sum of 15 runs spanning about 45 minutes (~75 degrees of rotation
by the primary).  

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Echo power spectrum obtained on April 28 at a frequency resolution of 2 Hz.



Image collage from April 28.  The resolution is 150 m x 3.8 Hz.  Each panel is
a weighted sum of 10 runs.  Time increases from left to right and then down.

The secondary is at its maximum separation in range
in the first panel at the top left.  The distance between the centers-of-mass is about 2.2 km, 
which is consistent with expectations from previous orbital fits and the
subradar latitude of -26 degrees.

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Image collage from April 29.  The resolution is 150 m x 3.8 Hz.  
Each panel is a weighted sum of 10 runs.

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Image collage from April 30.  The resolution is 150 m x 3.8 Hz.
Each panel is a weighted sum of 10 runs.

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Images from April 30-May 1.  The resolution is 150 m x 3.8 Hz.
Each panel is a weighted sum of 10 runs.

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Images from May 1-2.  The resolution is 75 m x 3.8 Hz and each panel
is a weighted sum of 15 runs.

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Images from May 2-3.  The resolution is 75 m x 3.8 Hz.

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Images from May 3-4.  The resolution is 150 m x 3.8 Hz.
A data processing glitch affected the images in the second panel.

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1996 FG3 delay-Doppler images from May 6-7.  The resolution is 150 m x 3.8 Hz and each panel is a 
weighted sum of 9 or 10 runs.  Identical contrast stretches have been applied to each frame. 

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1996 FG3 delay-Doppler images from May 7-8.  The resolution is 150 m x 3.8 Hz and each panel is a
weighted sum of 8 - 10 runs.  Different contrast stretches have been applied to each frame.



Goldstone Radar Echoes from Asteroid 2022 HB


Echo power spectrum from 2022 HB obtained on April 25.
The frequency resolution is 0.024 Hz and the bandwidth is about 0.2 Hz.
The echo shows a Doppler correction to the ephemeris of -59.6 Hz.

The echo's bandwidth of 0.2 Hz and the rotation period of 87 h reported by
P. Pravec (pers. comm.) place a lower bound of 0.17 km on the maximum 
pole-on breadth.


Discovery M.P.E.C.


1996 FG3
https://www.minorplanetcenter.net/mpec/J96/J96F07.html


SNR Calculations


1996 FG3
GOLDSTONE SNRs
1996 FG3:  D = 1.9 km,  P = 3.59 h,  OC albedo = 0.16,  pole = (242, -84)

In the table below, "delta" is the subradar latitude.
2022 observations will show far southern latitudes for the first time.

                                          RA   Dec Distance delta   
wk DOY       start date     rise  set     deg  deg   au      deg    runs   SNR/day SNR/run  
14 100      2022 Apr 10     04:32-10:12   192  -22  0.151    -20      68     19      2    
15 101      2022 Apr 11     04:23-10:03   191  -22  0.146    -20      70     22      3 Scheduled  Overlaps 2004 FG11 
15 102      2022 Apr 12     04:13-09:53   189  -22  0.141    -20      73     25      3
15 103      2022 Apr 13     04:03-09:44   188  -22  0.136    -21      75     29      4
15 104      2022 Apr 14     03:53-09:34   186  -22  0.131    -21      78     33      4
15 105      2022 Apr 15     03:42-09:23   185  -21  0.126    -22      81     38      5    
15 106      2022 Apr 16     03:30-09:13   183  -21  0.122    -22      85     45      5
15 107      2022 Apr 17     03:18-09:02   181  -21  0.118    -23      88     52      6
16 108      2022 Apr 18     03:05-08:51   179  -21  0.114    -23      92     60      7
16 109      2022 Apr 19     02:51-08:39   177  -21  0.110    -24      96     70      8
16 110      2022 Apr 20     02:37-08:28   174  -21  0.106    -24     100     81      9    
16 111      2022 Apr 21     02:21-08:16   172  -20  0.102    -25     105     94     10
16 112      2022 Apr 22     02:05-08:04   169  -20  0.099    -25     110    110     11
16 113      2022 Apr 23     01:48-07:52   167  -19  0.096    -25     115    130     13
16 114      2022 Apr 24     01:30-07:39   164  -19  0.093    -26     120    140     14
17 115      2022 Apr 25     01:12-07:27   161  -18  0.090    -26     126    160     16 Scheduled
17 116      2022 Apr 26     00:52-07:14   158  -18  0.088    -26     132    190     18 Scheduled   
17 117      2022 Apr 27     00:32-07:01   155  -17  0.085    -26     138    210     20 Scheduled   
17 118      2022 Apr 28     00:11-06:48   151  -16  0.084    -26     144    230     21 Scheduled   
17 118-119  2022 Apr 28-29  23:49-06:35   148  -15  0.082    -26     150    260     23 Scheduled   
17 119-120  2022 Apr 29-30  23:26-06:21   144  -14  0.081    -26     156    280     25 Scheduled   
17 120-121  2022 Apr 30-01  23:04-06:08   141  -13  0.080    -26     162    300     26 Scheduled  
17 121-122  2022 May 01-02  22:41-05:55   137  -12  0.079    -26     167    320     27 Scheduled
18 122-123  2022 May 02-03  22:18-05:42   134  -10  0.078    -25     172    330     28 Scheduled 1.2 deg of primary rotation/run
18 123-124  2022 May 03-04  21:55-05:29   130   -9  0.078    -24     176    340     28 Scheduled
18 124-125  2022 May 04-05  21:32-05:16   127   -8  0.079    -24     179    340     28 Scheduled 
18 125-126  2022 May 05-06  21:09-05:03   123   -6  0.079    -23     182    340     27 Do Cislunar instead of FG3
18 126-127  2022 May 06-07  20:47-04:50   120   -5  0.080    -22     184    330     26 Scheduled
18 127-128  2022 May 07-08  20:25-04:37   116   -4  0.081    -21     184    310     25 Scheduled
18 128-129  2022 May 08-09  20:04-04:25   113   -2  0.082    -20     184    300     24 Scheduled
19 129-130  2022 May 09-10  19:44-04:13   110   -1  0.084    -19     184    280     22 Scheduled
19 130-131  2022 May 10-11  19:24-04:01   107    0  0.086    -18     182    250     20 Scheduled 
19 131-132  2022 May 11-12  19:05-03:49   104   +1  0.088    -17     180    230     19 Scheduled
19 132-133  2022 May 12-13  18:46-03:38   102   +2  0.091    -16     178    210     17 
19 133-134  2022 May 13-14  18:29-03:26    99   +4  0.093    -15     175    190     15 Scheduled
19 134-135  2022 May 14-15  18:12-03:15    96   +5  0.096    -14     171    170     14 Scheduled
19 135-136  2022 May 15-16  17:55-03:05    94   +6  0.099    -13     168    150     12 Scheduled
20 136-137  2022 May 16-17  17:40-02:54    92   +6  0.102    -12     164    130     11
20 137-138  2022 May 17-18  17:25-02:44    90   +7  0.106    -11     160    110     10
20 138-139  2022 May 18-19  17:10-02:34    88   +8  0.110    -10     155     99      9
20 139-140  2022 May 19-20  16:56-02:25    86   +9  0.114     -9     151     87      8
20 140-141  2022 May 20-21  16:43-02:15    84   +9  0.118     -8     147     76      7    
20 141-142  2022 May 21-22  16:30-02:06    82  +10  0.122     -7     143     66      6
20 142-143  2022 May 22-23  16:18-01:58    80  +11  0.126     -7     138     57      5
21 143-144  2022 May 23-24  16:06-01:49    79  +11  0.131     -6     134     50      5
21 144-145  2022 May 24-25  15:55-01:41    77  +12  0.136     -5     130     43      4
21 145-146  2022 May 25-26  15:44-01:32    76  +12  0.141     -5     126     37      4
21 146-147  2022 May 26-27  15:34-01:25    75  +13  0.146     -4     122     32      3
21 147-148  2022 May 27-28  15:24-01:17    73  +13  0.151     -3     118     28      3
21 148-149  2022 May 28-29  15:14-01:09    72  +14  0.156     -3     115     24      2
21 149-150  2022 May 29-30  15:04-01:02    71  +14  0.162     -2     111     21      2

SNRs for the secondary will be about 1/4th of the values for the primary.

1996 FG3 might overlap other targets later in May.


2022 HB 2022 HB: D = 0.2 km, P = 2.2 h, OC albedo = 0.1 start date window RA, dec dist runs SNR/day SNR/run 2022 Apr 12 11:44-00:37 356, +46 0.053 440 30 2 2022 Apr 13 11:17-00:29 352, +49 0.048 507 48 2 2022 Apr 14 10:41-00:18 347, +53 0.042 592 79 4 2022 Apr 15 09:52-00:01 339, +57 0.037 702 130 5 2022 Apr 16 08:41-23:26 327, +62 0.033 841 220 8 2022 Apr 17 07:00-22:09 306, +65 0.030 993 350 12 2022 Apr 18 05:03-19:58 279, +65 0.027 1076 480 16 2022 Apr 19 03:38-17:41 253, +60 0.026 1031 550 19 2022 Apr 20 02:59-15:58 236, +50 0.027 917 500 18 2022 Apr 21 02:44-14:45 225, +40 0.028 783 360 14 2022 Apr 22 02:39-13:52 219, +30 0.031 654 230 10 2022 Apr 23 02:37-13:13 214, +22 0.036 544 140 6 2022 Apr 24 02:37-12:42 211, +16 0.040 455 82 4 2022 Apr 25 02:37-12:16 209, +11 0.046 385 49 3 Overlaps 1996 FG3 2022 Apr 26 02:37-11:55 207, +7 0.051 329 30 2 Overlaps 1996 FG3 2022 Apr 27 02:37-11:37 205, +4 0.057 286 19 1 Observed SNRs were stronger.

Track Assignments



DOY BOA  BOT  EOT  EOA
101 0410 0540 0845 0915  DSS-14  GSSR   AST 2004 FG11  (Overlap with 1996 FG3)
115 0000 0130 0725 0755  DSS-14  GSSR   AST 1996 FG3           
116 0050 0220 0710 0740  DSS-14  GSSR   AST 1996 FG3     
116 2305 0035 0345 0415  DSS-14  GSSR   AST 1996 FG3     
117 2300 0030 0440 0510  DSS-14  GSSR   AST 1996 FG3     
118 2230 0000 0350 0420  DSS-14  GSSR   AST 1996 FG3     
119 2200 2330 0350 0420  DSS-14  GSSR   AST 1996 FG3     
120 2140 2310 0345 0415  DSS-14  GSSR   AST 1996 FG3     
121 2220 2350 0325 0355  DSS-14  GSSR   AST 1996 FG3     
122 2145 2315 0115 0145  DSS-14  GSSR   AST 1996 FG3        
123 2215 2345 0330 0400  DSS-14  GSSR   AST 1996 FG3       
124 1015 1145 1310 1340  DSS-14  GSSR   AST 2006 JF42            ** Different asteroid ** 
125 2300 0030 0500 0530  DSS-13  GSSR   CIS-LUNAR RADAR          ** DSS-13 **
125 2300 0030 0500 0530  DSS-14  GSSR   CISLUNAR/1996FG3  
126 1920 2050 0320 0350  DSS-14  GSSR   AST 1996 FG3             Overlaps TZ3
127 2145 2315 0315 0345  DSS-14  GSSR   AST 1996 FG3             Overlaps TZ3
128 1915 2045 0425 0455  DSS-14  GSSR   AST 1996 FG3             Overlaps TZ3
129 2105 2235 0310 0340  DSS-14  GSSR   AST 1996 FG3             Overlaps TZ3
130 2300 0030 0620 0650  DSS-14  GSSR   AST 2008 TZ3/1996 FG3    Partial overlap: FG3 sets first
131 2100 2230 0225 0255  DSS-14  GSSR   AST 1996 FG3             Overlaps TZ3          
133 2335 0105 0250 0320  DSS-14  GSSR   AST 2008 TZ3/1996 FG3    Complete overlap 
134 2045 2215 0115 0145  DSS-14  GSSR   AST 2008 TZ3/1996 FG3    Complete overlap       
135 0145 0315 0615 0645  DSS-14  GSSR   AST 2006 JF42            ** Different asteroid ** 
135 2100 2230 0030 0100  DSS-14  GSSR   AST 2008 TZ3/1996 FG3    Complete overlap       

Goldstone tracks:
         UT         UT                      PDT                 Dur'n  RTT  SNR/
DOY      Date       TX Window  Target       TX Window           hh:mm  sec  run      
101      Apr 11     0540 0845  1996 FG3     2240-0145 Apr 10-11  3:05  146    3  MB  Rises at 04:23; Overlaps 2004 FG11
115      Apr 25     0130 0725  1996 FG3     1830-0025 Apr 24-25  5:55   90   16  LB  Rises at 01:12  Also 2022 HB
116      Apr 26     0220 0710  1996 FG3     1920-0010 Apr 25-26  4:50   88   18  MB  Rises at 00:52  Also 2022 HB
117      Apr 27     0035 0345  1996 FG3     1735-2045 Apr 26     3:10   85   20  MB   
118      Apr 28     0030 0440  1996 FG3     1730-2140 Apr 27     4:10   84   21  MB  Rises at 00:11
119      Apr 29     0000 0350  1996 FG3     1700-2050 Apr 28     3:50   82   23  MB  Rises at 23:49 on Apr 28
119-120  Apr 29-30  2330 0350  1996 FG3     1630-2050 Apr 29     4:20   81   25  MB    
120-121  Apr 30-01  2310 0345  1996 FG3     1610-2045 Apr 30     4:35   80   26  MB  Rises at 23:04
121-122  May  1- 2  2350 0325  1996 FG3     1650-2025 May  1     3:35   79   27  MB  Rises at 22:41 
122-123  May  2- 3  2315 0115  1996 FG3     1615-1815 May  2     2:00   78   28  MB
123-124  May  3- 4  2345 0330  1996 FG3     1645-2030 May  3     3:45   78   28  MB
124      May  4     1145 1310  2006 JF42    0445-0610 May  4     1:25   48    6  SN 
126      May  6     0030 0500 CISLUNAR/FG3  1730-2200 May  5     4:30   79   28      DSS-14 & DSS-13. ** Devote to CISLUNAR **
126-127  May  6- 7  2050 0320  1996 FG3     1350-2020 May  6     6:30   80   26  LB  Overlaps 2008 TZ3
127-128  May  7- 8  2315 0315  1996 FG3     1615-2015 May  7     4:00   81   25  LB  Overlaps 2008 TZ3. FG3 rises before the track.
128-129  May  8- 9  2045 0425  1996 FG3     1345-2125 May  8     7:40   82   24  SN  Overlaps 2008 TZ3
130      May 10     0030 0410  1996 FG3     1730-2110 May  9     4:35   84   22  SN  Overlaps 2008 TZ3
131      May 11     0030 0400  1996 FG3     1730-2100 May 10     3:30   86   20  SN  Precal starts during DOY 130; FG3 sets first
131      May 11     0030 0620  2008 TZ3     1730-2320 May 10     5:50   44    7  SN
131-132  May 11-12  2230 0225  1996 FG3     1530-1925 May 11     3:55   88   19  LB  Overlaps 2008 TZ3
131-132  May 11-12  2235 0225  2008 TZ3     1535-1925 May 11     3:50   42    8  LB  
134      May 14     0105 0250  1996 FG3     1805-1950 May 13     1:45   93   15  LB    Precal starts during DOY 133
134      May 14     0105 0250  2008 TZ3     1805-1950 May 13     1:45   39   10  LB
134-135  May 14-15  2215 0115  1996 FG3     1515-1815 May 14     3:00   96   14  SN
134-135  May 14-15  2215 0115  2008 TZ3     1515-1815 May 14     3:00   39   10  SN 
135      May 15     0315 0615  2006 JF42    2015-2315 May 14     3:00   56    4  SN  Right after TZ3 & FG3
135-136  May 15-16  2100 0030  1996 FG3     1400-1730 May 15     3:30   99   12  LB  View period extends to 0305.
135-136  May 15-16  2200 0030  2008 TZ3     1500-1730 May 15     2:30   38   10  LB
136      May 16     0230 0330  2006 JF42    1930-2030 May 15     1:00            JJ  Engineering tests
136      May 16     0230 0330  1989 JA      1930-2030 May 15     1:00            JJ  Engineering tests

More tracks for all objects into mid June:
115      Apr 25     0130 0725  1996 FG3          1830-0025 Apr 24-25  5:55     90    16       LB
116      Apr 26     0220 0710  1996 FG3          1920-0010 Apr 25-26  4:50     88    18       MB
117      Apr 27     0035 0345  1996 FG3          1735-2045 Apr 26     3:10     85    20       MB
118      Apr 28     0030 0440  1996 FG3          1730-2140 Apr 27     3:10     84    21       MB
119      Apr 29     0000 0350  1996 FG3          1700-2050 Apr 28     3:50     82    23       MB
119-120  Apr 29-30  2330 0350  1996 FG3          1630-2050 Apr 29     4:20     81    25       MB
120-121  Apr 30-01  2310 0345  1996 FG3          1610-2045 Apr 30     4:35     80    26       MB
121-122  May  1- 2  2350 0325  1996 FG3          1650-2025 May  1     3:35     79    27       MB
122-123  May  2- 3  2315 0115  1996 FG3          1615-1815 May  2     2:00     78    28       MB
123-124  May  3- 4  2345 0330  1996 FG3          1645-2030 May  3     3:45     78    28       MB
124      May  4     1145 1310  2006 JF42         0445-0610 May  4     1:25     48     6       SN
126      May  6     0030 0500  CISLUNAR          1730-2200 May  5     4:30                    CL   Clement Lee
(126     May  6     0030 0500  1996 FG3          1730-2200 May  5     4:30     79    27         )  SKIP
126-127  May  6- 7  2050 0320  1996 FG3          1350-2020 May  6     6:30     80    26       SN   Overlaps TZ3
127-128  May  7- 8  2315 0315  1996 FG3          1615-2015 May  7     4:00     81    25       SN   Overlaps TZ3
128-129  May  8- 9  2045 0425  1996 FG3          1345-2125 May  8     7:40     82    24       SN   Overlaps TZ3
129-130  May  9-10  2235 0310  1996 FG3          1535-2010 May  9     4:35     84    22       SN   Overlaps TZ3
131      May 11     0030 0620  2008 TZ3          1730-2320 May 10     5:50     44     7       SN
131      May 11     0030 0400  1996 FG3          1730-2100 May 10     3:30     86    20       SN
131-132  May 11-12  2230 0225  1996 FG3          1530-1925 May 11     3:55     88    19       LB
131-132  May 11-12  2235 0225  2008 TZ3          1535-1925 May 11     3:50     42     8       LB
134      May 14     0015 0250  2008 TZ3          1715-1950 May 13     2:35     39    10       LB
134      May 14     0015 0250  1996 FG3          1715-1950 May 13     2:35     93    15       LB
134-135  May 14-15  2215 0115  2008 TZ3          1515-1815 May 14     3:00     39    10       SN
134-135  May 14-15  2215 0115  1996 FG3          1515-1815 May 14     3:00     96    14       SN
135      May 15     0315 0640  2006 JF42         2015-2340 May 14     3:00     56     4       SN
135-136  May 15-16  2200 0030  2008 TZ3          1500-1730 May 15     2:30     38    10       LB
135-136  May 15-16  2100 0030  1996 FG3          1400-1730 May 15     3:30     99    12       LB  FG3 is visible until 0305 
136      May 16     0230 0330  2006 JF42         1930-2030 May 15     1:00     61     3       JJ  Use for engineering tests
136      May 16     0230 0330  1989 JA           1930-2030 May 15     1:00     91     3       JJ  Use for engineering tests

136-137  May 16-17  2305-0230  2008 TZ3          1605-1930 May 16     3:25     39     9       
137      May 17     0430-0935  1989 JA           2130-0235 May 16-17  5:05     83     3           Cancel?

137-138  May 17-18  2345-0130  2008 TZ3          1645-1830 May 17     1:45     40     8
138      May 18     0220-0555  1989 JA           1920-2255 May 17     3:25     76     5           Cancel?

140      May 20     0215-0545  1989 JA           1915-2245 May 19     3:30     62    10 
141      May 21     0625-1040  1989 JA           2325-0340 May 20-21  4:15     55    14
142      May 22     0205-0535  1989 JA           1905-2235 May 21     3:30     45    22
143      May 23     0200-0550  1989 JA           1900-2250 May 22     3:50     43    34
144      May 24     0200-0850  1989 JA           1900-0150 May 23-24  6:50     37    53
144      May 24     0650-1000  1993 EA           2350-0300 May 23-24  3:10     81     9
145      May 25     0210-0435  1989 JA           1910-2135 May 24     2:25     34    78
156      May 26     0245-0520  1989 JA           1945-2220 May 25     2:35     29    97
147      May 27     0020-0200  2003 CY18         1720-1900 May 26     1:40     96     2
148      May 28     0845-1015  1993 EA           0145-0315 May 28     1:30     69    16        Cancelled: spacecraft safe mode
149      May 29     0100-1020  2003 CY18         1800-0320 May 28-29  9:20     94     2        Cancelled
149      May 29     0850-1020  1993 EA           0150-0320 May 29     1:30     70    15        Cancelled
149      May 29     1605-2050  1993 EA           0905-1350 May 29     4:45     70    15
149      May 29     1605-2205  2003 CY18         0905-1505 May 29     4:00     94     2
150      May 30     0130-0250  2003 CY18         1830-1950 May 29     1:20     93     2        Cancelled
152      Jun  1     0440-0740  2003 CY18         2140-0040 May 31-01  3:00     93     2
153      Jun  2     0910-1110  2003 CY18         0210-0410 Jun  2     2:10     93     2        Cancelled
154      Jun  3     0945-1535  2003 CY18         0245-0835 Jun  3     6:00     94     2       
154      Jun  3     1345-1535  2022 HT2          0645-0835 Jun  3     1:50     46     3         
155      Jun  4     0930-1530  2003 CY18         0230-0830 Jun  4     6:00     95     2        Engineering tests 
161      Jun 10     1610-2235  2018 XR           0910-1535 Jun 10     6:25     65    13
163      Jun 12     1415-1805  2018 XR           0715-1105 Jun 12     3:50     59    18   Updated    Overlaps 2022 GU6
164      Jun 13     1800-1925  2018 XR           1100-1225 Jun 13     1:25     58    16   CANCELLED  Overlaps 2022 GU6

We may cancel some of the tracks with weaker SNRs for 1989 JA, 2006 JF42, 1993 EA, and 2003 CY18.



Uncertainties


1996 FG3
JPL/Horizons solution 150, # obs: 1697 (1985-2022)
2022 February 3
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.             delta  POS_3sigma   DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2022-Apr-10 00:00 *m  192.39388 -21.59809  0.15240875252009       1.312         0.83        3.03       0.000357
 2022-Apr-11 00:00 *m  191.10325 -21.62226  0.14718185818829       1.350         0.86        3.14       0.000389 *
 2022-Apr-12 00:00 *m  189.72513 -21.62860  0.14208762227371       1.387         0.89        3.25       0.000421
 2022-Apr-13 00:00 *m  188.25422 -21.61459  0.13712993067903       1.422         0.92        3.36       0.000455
 2022-Apr-14 00:00 *m  186.68497 -21.57737  0.13231313390729       1.457         0.95        3.47       0.000489
 2022-Apr-15 00:00 *   185.01164 -21.51366  0.12764212997839       1.489         0.98        3.57       0.000525
 2022-Apr-16 00:00 *   183.22831 -21.41974  0.12312245650470       1.518         1.01        3.66       0.000562
 2022-Apr-17 00:00 *   181.32905 -21.29139  0.11876038607911       1.543         1.03        3.74       0.000599
 2022-Apr-18 00:00 *   179.30802 -21.12390  0.11456301481999       1.564         1.05        3.81       0.000637
 2022-Apr-19 00:00 *   177.15970 -20.91205  0.11053833121773       1.580         1.06        3.86       0.000676
 2022-Apr-20 00:00 *   174.87910 -20.65015  0.10669525300792       1.589         1.07        3.88       0.000715
 2022-Apr-21 00:00 *   172.46214 -20.33208  0.10304362387177       1.590         1.06        3.87       0.000754
 2022-Apr-22 00:00 *   169.90591 -19.95146  0.09959416689558       1.584         1.05        3.82       0.000792
 2022-Apr-23 00:00 *   167.20914 -19.50183  0.09635839467566       1.568         1.02        3.72       0.000830
 2022-Apr-24 00:00 *   164.37253 -18.97689  0.09334847531464       1.544         0.98        3.57       0.000867
 2022-Apr-25 00:00 *   161.39918 -18.37083  0.09057705075656       1.512         0.92        3.35       0.000901 *
 2022-Apr-26 00:00 *   158.29491 -17.67875  0.08805700182992       1.474         0.84        3.06       0.000933 *
 2022-Apr-27 00:00 *   155.06853 -16.89712  0.08580115532068       1.434         0.74        2.70       0.000962 *
 2022-Apr-28 00:00 *   151.73199 -16.02419  0.08382193318295       1.396         0.62        2.26       0.000987 *
 2022-Apr-29 00:00 *m  148.30030 -15.06050  0.08213095207559       1.368         0.48        1.74       0.001007 *
 2022-Apr-30 00:00 *m  144.79133 -14.00924  0.08073859148935       1.357         0.31        1.14       0.001022 *
 2022-May-01 00:00 *m  141.22534 -12.87643  0.07965355893003       1.371         0.14        0.50       0.001031 *
 2022-May-02 00:00 *m  137.62436 -11.67091  0.07888248883218       1.413         0.07        0.25       0.001033 *
 2022-May-03 00:00 *m  134.01133 -10.40418  0.07842961580967       1.485         0.27        0.96       0.001028 *
 2022-May-04 00:00 *m  130.40930  -9.08980  0.07829656059631       1.582         0.47        1.70       0.001016 *
 2022-May-05 00:00 *m  126.84049  -7.74282  0.07848225773287       1.696         0.67        2.43       0.000996 *
 2022-May-06 00:00 *m  123.32554  -6.37890  0.07898303857920       1.820         0.86        3.13       0.000970 *
 2022-May-07 00:00 *m  119.88284  -5.01348  0.07979286430840       1.944         1.04        3.77       0.000937 *
 2022-May-08 00:00 *m  116.52811  -3.66109  0.08090368514193       2.063         1.20        4.35       0.000899 *
 2022-May-09 00:00 *m  113.27418  -2.33466  0.08230588810290       2.170         1.34        4.86       0.000855 *
 2022-May-10 00:00 *m  110.13093  -1.04515  0.08398878850512       2.263         1.45        5.29       0.000806 *
 2022-May-11 00:00 *m  107.10546   0.19867  0.08594112065485       2.339         1.55        5.64       0.000754 *
 2022-May-12 00:00 *m  104.20233   1.39023  0.08815148932840       2.397         1.63        5.91       0.000699 
 2022-May-13 00:00 *m  101.42391   2.52504  0.09060875306764       2.437         1.68        6.12       0.000641 *
 2022-May-14 00:00 *    98.77076   3.60049  0.09330232102045       2.460         1.72        6.27       0.000582 *
 2022-May-15 00:00 *    96.24197   4.61554  0.09622235586847       2.468         1.75        6.36       0.000521 *
 2022-May-16 00:00 *    93.83555   5.57044  0.09935988636672       2.461         1.76        6.40       0.000460
 2022-May-17 00:00 *    91.54866   6.46644  0.10270684411604       2.443         1.76        6.41       0.000398


Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination: 1996 FG3 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2022-Feb-01 00:00 200.31039 -11.31084 0.71009096004581 19.931 6.348 109.0713 /L 105.5/ 0.2530 2022-Feb-03 00:00 200.93940 -11.68533 0.69030532146156 19.856 6.337 110.3861 /L 133.4/ 4.3698 2022-Feb-05 00:00 201.54790 -12.05600 0.67059615430180 19.779 6.325 111.7200 /L 159.5/ 17.2687 2022-Feb-07 00:00 202.13490 -12.42296 0.65097750669148 19.699 6.312 113.0735 /L 172.4/ 35.0232 2022-Feb-09 00:00 202.69933 -12.78634 0.63146213194400 19.616 6.297 114.4474 /L 150.7/ 54.1704 2022-Feb-11 00:00 203.23996 -13.14627 0.61206184808155 19.530 6.282 115.8425 /L 127.9/ 72.2024 2022-Feb-13 00:00 203.75536 -13.50287 0.59278780993542 19.442 6.266 117.2599 /L 104.9/ 87.1089 2022-Feb-15 00:00 204.24397 -13.85625 0.57365064469139 19.350 6.249 118.7006 /L 81.3/ 96.9195 2022-Feb-17 00:00 204.70399 -14.20649 0.55466057830732 19.256 6.230 120.1662 /L 56.9/ 99.7219 2022-Feb-19 00:00 205.13341 -14.55365 0.53582770280132 19.158 6.211 121.6580 /L 31.7/ 94.2307 2022-Feb-21 00:00 205.52995 -14.89777 0.51716243921504 19.056 6.190 123.1780 /L 7.945/ 80.5619 2022-Feb-23 00:00 205.89106 -15.23882 0.49867608633735 18.951 6.168 124.7281 /L 23.1/ 60.6526 2022-Feb-25 00:00 206.21381 -15.57674 0.48038124575331 18.842 6.144 126.3105 /L 50.3/ 38.1174 2022-Feb-27 00:00 206.49503 -15.91142 0.46229194000183 18.730 6.119 127.9274 /L 78.3/ 17.6876 2022-Mar-01 00:00 206.73130 -16.24275 0.44442328724230 18.613 6.093 129.5811 /L 106.4/ 4.0862 2022-Mar-01 00:00 206.73130 -16.24275 0.44442328724230 18.613 6.093 129.5811 /L 106.4/ 4.0862 2022-Mar-03 00:00 206.91912 -16.57066 0.42679069152959 18.492 6.064 131.2735 /L 133.9/ 0.2604 2022-Mar-05 00:00 207.05494 -16.89519 0.40940883354415 18.367 6.034 133.0066 /L 159.7/ 6.1441 2022-Mar-07 00:00 207.13495 -17.21644 0.39229101958355 18.237 6.002 134.7823 /L 170.0/ 19.2867 2022-Mar-09 00:00 207.15495 -17.53452 0.37544914712097 18.102 5.968 136.6024 /L 148.4/ 36.5735 2022-Mar-11 00:00 207.11020 -17.84950 0.35889402125888 17.962 5.932 138.4689 /L 125.3/ 55.3242 2022-Mar-13 00:00 206.99534 -18.16138 0.34263566397788 17.817 5.893 140.3837 /L 101.8/ 73.3274 2022-Mar-15 00:00 206.80431 -18.47008 0.32668349934011 17.667 5.852 142.3485 /L 77.6/ 88.3661 2022-Mar-17 00:00 206.53020 -18.77538 0.31104651757776 17.511 5.808 144.3648 /L 52.4/ 97.8836 2022-Mar-19 00:00 206.16507 -19.07687 0.29573361639666 17.349 5.761 146.4334 /L 26.5/ 99.3174 2022-Mar-21 00:00 205.69977 -19.37388 0.28075425139015 17.180 5.711 148.5540 /L 10.6/ 91.2523 2022-Mar-23 00:00 205.12373 -19.66539 0.26611924917284 17.005 5.658 150.7241 /L 33.3/ 74.6248 2022-Mar-25 00:00 204.42483 -19.94991 0.25184135770970 16.822 5.601 152.9372 /L 61.2/ 52.8060 2022-Mar-27 00:00 203.58941 -20.22547 0.23793521624185 16.633 5.541 155.1800 /L 89.4/ 30.5046 2022-Mar-29 00:00 202.60229 -20.48959 0.22441681943186 16.437 5.478 157.4272 /L 117.2/ 12.4034 2022-Mar-31 00:00 201.44661 -20.73921 0.21130277815296 16.236 5.411 159.6329 /L 143.9/ 1.9821 2022-Apr-02 00:00 200.10357 -20.97053 0.19860971627214 16.030 5.345 161.7170 /L 164.7/ 0.6489 2022-Apr-04 00:00 198.55180 -21.17873 0.18635412832395 15.825 5.281 163.5434 /L 155.4/ 7.6537 2022-Apr-06 00:00 196.76686 -21.35753 0.17455284623475 15.628 5.228 164.8967 /L 132.3/ 20.9223 2022-Apr-08 00:00 194.72062 -21.49868 0.16322397398276 15.449 5.196 165.4858 /T 108.1/ 38.0883 2022-Apr-10 00:00 192.38080 -21.59127 0.15238805388928 15.300 5.195 165.0285 /T 83.5/ 56.9649 2022-Apr-12 00:00 189.71070 -21.62089 0.14206938902167 15.183 5.227 163.3955 /T 58.4/ 75.3497 2022-Apr-14 00:00 186.66913 -21.56861 0.13229765895361 15.096 5.288 160.6508 /T 34.1/ 90.5286 2022-Apr-16 00:00 183.21105 -21.40975 0.12311006443908 15.031 5.368 156.9427 /T 21.8/ 99.1175 2022-Apr-18 00:00 179.28939 -21.11249 0.11455406000749 14.984 5.462 152.3977 /T 40.8/ 98.0258 2022-Apr-20 00:00 174.85928 -20.63712 0.10669011208825 14.955 5.564 147.0896 /T 70.0/ 86.4511 2022-Apr-22 00:00 169.88519 -19.93665 0.09959322179072 14.947 5.673 141.0518 /T 100.5/ 66.9947 2022-Apr-24 00:00 164.35141 -18.96021 0.09335208249056 14.964 5.787 134.2996 /T 129.1/ 44.4500 2022-Apr-26 00:00 158.27407 -17.66025 0.08806544510327 15.015 5.907 126.8543 /T 148.8/ 23.6877 2022-Apr-28 00:00 151.71228 -16.00410 0.08383536197911 15.109 6.033 118.7646 /T 142.1/ 8.4115 2022-Apr-30 00:00 144.77367 -13.98804 0.08075695496454 15.257 6.166 110.1247 /T 117.6/ 0.7652 2022-May-02 00:00 137.60963 -11.64926 0.07890548632940 15.467 6.309 101.0827 /T 89.6/ 1.2829 2022-May-04 00:00 130.39814 -9.06844 0.07832363278733 15.751 6.465 91.8333 /T 62.0/ 9.1549 2022-May-06 00:00 123.31828 -6.35851 0.07901341306034 16.113 6.639 82.5936 /T 38.3/ 22.7921 2022-May-08 00:00 116.52473 -3.64218 0.08093646696716 16.561 6.840 73.5702 /T 30.2/ 40.3480 2022-May-10 00:00 110.13113 -1.02796 0.08402306570910 17.096 7.075 64.9303 /T 47.1/ 59.8307 2022-May-12 00:00 104.20562 1.40564 0.08818642118916 17.724 7.354 56.7856 /T 74.1/ 78.7322 2022-May-14 00:00 98.77656 3.61425 0.09333719153526 18. 8. 49.1947 /T 104.5/ 93.5225 2022-May-16 00:00 93.84329 5.58274 0.09939412328470 19. 8. 42.1741 /T 135.6/ 99.9547 2022-May-18 00:00 89.38704 7.31659 0.10628921831864 20. 9. 35.7144 /T 160.0/ 95.1235 2022-May-20 00:00 85.37917 8.83337 0.11396846753637 21. 9. 29.7943 /T 147.2/ 79.9353

Setups



Due to the primary's rotation period, diameter, and the subradar latitudes (about -20 deg), we
are expecting a bandwidth of about 50 Hz.  For the secondary, we are expecting a bandwidth of
about 3 Hz. 

Solution 150 time delay uncertainties are large enough that we should do 10 usec and 11 usec ranging.

CW setup:
TX polarization     RCP
RCV polarization    LCP & RCP
Frequency hops:     no hopping
Bandwidth:          5000 Hz 
TXoffset            +500 Hz
FFT                 5000 for 1 Hz resolution 


Ranging setups:
---------------------------------------------------------------------------
10-usec
baud             10 usec
code            127
PRP            1270 usec
FFT             128   
ncoh              1 
bandwidth       787 Hz   
resolution       12.3 Hz
TXOFF          +100 Hz  (echo in bin 32 + 8 = 40)
---------------------------------------------------------------------------
11-usec 
baud             11 usec
code            127
PRP            1397 usec
FFT              64  
ncoh              1 
bandwidth       716 Hz   
resolution       11.2 Hz
TXOFF          +100 Hz  (echo in bin 32 + 9 = 41) 
-------------------------------------------------------------------------
1-usec 
baud              1 usec
code            255
FFT             256
ncoh             16
bandwidth       245 Hz   
resolution        0.96 Hz
TXOFF           +50 Hz 
Time delay extent: 38250 meters
---------------------------------------------------------------------
1/2-usec
baud            1/2 usec
code            255
FFT             256
ncoh             16
bandwidth       490.2 Hz
resolution        1.9 Hz
TXOFF           +50 Hz
Time delay extent: 19125 meters, which is more than enough to cover the 
orbit of the secondary (which is about +-2500 meters)
---------------------------------------------------------------------


Instructions

NOTE: Data should be moved to the appropriate subdirectories in aardvark:/export/data0/a175706/raw/

POINTING:

  OSOD and predicts will be on aardvark:

...not available yet...


POINTING  
                                                          TX Offsets    
Date (UTC)   DOY  hhmmss    RA        Dec         Macro   LHA     Dec    RTT    OSOD

... to be added ...

Transmit offsets are given in millidegrees.  


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

1996 FG3 GOLDSTONE MASTERLOG

============================================================================== Receive TX Setup hops dwell code ncoh FFT runs start -stop OSOD offset Poln Notes ------------------------------------------------------------------------------
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 http://echo.jpl.nasa.gov/asteroids/1996FG3/1996FG3.2022.planning.html

Asteroid Radar Astronomy
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