Goldstone Radar Observations Planning: (175706) 1996FG3 and 2022 HB
(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)
---------------------------------------------------------------------
NOTE: Data should be moved to the appropriate subdirectories in
aardvark:/export/data0/a175706/raw/
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
==============================================================================
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