Goldstone Radar Observations Planning: (175706) 1996FG3
(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 primary target of ESA's proposed "Marco Polo-R" mission. That mission proposal has reached the final four in ESA's "Cosmic Visions" program and it also has a significant JPL hardware contribution, so there is intense interest from both NASA and ESA in radar observations of this asteroid. This asteroid was scheduled twice at Arecibo, first in November, 1998, and again in May, 2009, but both opportunities were missed due to equipment problems. We have another chance to observe this object in November and December of 2011. 1996 FG3 will be a CW target at Goldstone, while we expect high-resolution (0.1 usec) delay-Doppler imaging at Arecibo. Because the rotation period and pole direction of the primary are already known, CW echoes that provide the bandwith will also provide an estimate of the diameter for the primary, and, due to other results provided from photometry, an estimate of the semimajor axis of the system's orbit. Then we can use Kepler's 3rd law to estimate the mass and bulk density, which are invaluable for mission planning. The primary of 1996 FG3 has a diameter of ~1.7 km and a rotation period of 3.59 h (Pravec et al. 2000, Pravec et al. 2006). The secondary is about 1/3 the size of the primary and has an orbital period of 16.4 h, but it is unlikely that echoes from the secondary will be strong enough to detect at Goldstone. Scheirich and Pravec (2009) reported that that the system’s bulk density is 1.4 g cm^3, with uncertainties of up to 100%. Spectroscopy suggests that 1996 FG3 is a C-class (Binzel et al. 2002; Bus and Binzel 2002) or X-class (Whiteley 2001) object. Goldstone observations are scheduled on six dates between November 20-27. Arecibo observations started on November 6 and are also scheduled on Nov. 17-22 and Dec. 13-14. The Arecibo detection on November 6 indicates that the radar albedo is about 0.3, so we have revised the SNR estimates upward accordingly. The Arecibo images suggest that the primary is about 1.8 km in diameter and that the secondary is roughly 500 m in diameter. 1996 FG3 has been classified as a "Potentially Hazardous Asteroid" by the Minor Planet Center.
Orbital and Physical Characteristics
Name 1996 FG3
Number 175706
Discoverer R. S. McNaught/AANEAS
Discovery date 1996 March 24
orbit type Apollo
Close approach dist. 0.0783 au
Close approach dist. 30.47 lunar distances
Close approach date 2022 May 3
semimajor axis 1.054 au
eccentricity 0.350
inclination 2.0 deg
Orbital period 1.083 years
perihelion distance 0.685 au
aphelion distance 1.423 au
MOID 0.0283 au
absolute magnitude (H) 18.3
Primary diameter 1.9 km
Secondary diameter 0.5 km
optical albedo ~0.03
rotation period 3.594 h
lightcurve amplitude
orbital period 16.15 h
spectral class C
PHA, NHATS
Binary
Last update: 2022 January 13
1996 FG3 https://www.minorplanetcenter.net/mpec/J96/J96F07.html
1996 FG3
GOLDSTONE SNRs
1996 FG3: D = 1.9 km, P = 3.59 h, OC albedo = 0.16, pole = (242, -84)
<- Monostatic->
wk DOY start date window RA, dec dist delta 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
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 *
17 116 2022 Apr 26 00:52-07:14 158, -18 0.088 -26 132 190 18 *
17 117 2022 Apr 27 00:32-07:01 155, -17 0.085 -26 138 210 20 *
17 118 2022 Apr 28 00:11-06:48 151, -16 0.084 -26 144 230 21 *
17 118-119 2022 Apr 28-29 23:49-06:35 148, -15 0.082 -26 150 260 23 *
17 119-120 2022 Apr 29-30 23:26-06:21 144, -14 0.081 -26 156 280 25 *
17 120-121 2022 Apr 30-01 23:04-06:08 141, -13 0.080 -26 162 300 26 *
17 121-122 2022 May 01-02 22:41-05:55 137, -12 0.079 -26 167 320 27 *
18 122-123 2022 May 02-03 22:18-05:42 134, -10 0.078 -25 172 330 28 * 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 *
18 124-125 2022 May 04-05 21:32-05:16 127, -8 0.079 -24 179 340 28 *
18 125-126 2022 May 05-06 21:09-05:03 123, -6 0.079 -23 182 340 27 *
18 126-127 2022 May 06-07 20:47-04:50 120, -5 0.080 -22 184 330 26 *
18 127-128 2022 May 07-08 20:25-04:37 116, -4 0.081 -21 184 310 25 *
18 128-129 2022 May 08-09 20:04-04:25 113, -2 0.082 -20 184 300 24 *
19 129-130 2022 May 09-10 19:44-04:13 110, -1 0.084 -19 184 280 22 *
19 130-131 2022 May 10-11 19:24-04:01 107, 0 0.086 -18 182 250 20 *
19 131-132 2022 May 11-12 19:05-03:49 104, +1 0.088 -17 180 230 19 *
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
19 134-135 2022 May 14-15 18:12-03:15 96, +5 0.096 -14 171 170 14
19 135-136 2022 May 15-16 17:55-03:05 94, +6 0.099 -13 168 150 12
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
Track Assignments
Goldstone tracks:
UT UT PST Duration Round-trip
DOY Date Target TX Window TX Window hh:mm time (sec) SNR/run
...Not available yet...
Uncertainties
1996 FG3
JPL/Horizons solution 149, # obs: 1670 (1985-2021)
2022 January 13
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 192.39390 -21.59810 0.15240872637177 1.358 0.86 3.13 0.000370
2022-Apr-11 00:00 *m 191.10328 -21.62227 0.14718182973504 1.396 0.89 3.25 0.000403
2022-Apr-12 00:00 *m 189.72515 -21.62861 0.14208759143513 1.435 0.93 3.37 0.000436
2022-Apr-13 00:00 *m 188.25424 -21.61461 0.13712989737558 1.472 0.96 3.48 0.000471
2022-Apr-14 00:00 *m 186.68500 -21.57739 0.13231309806141 1.507 0.99 3.59 0.000507
2022-Apr-15 00:00 * 185.01166 -21.51368 0.12764209151457 1.540 1.02 3.69 0.000544
2022-Apr-16 00:00 * 183.22833 -21.41975 0.12312241535558 1.570 1.04 3.79 0.000582
2022-Apr-17 00:00 * 181.32907 -21.29140 0.11876034218341 1.597 1.07 3.88 0.000620
2022-Apr-18 00:00 * 179.30805 -21.12392 0.11456296812656 1.618 1.09 3.94 0.000660
2022-Apr-19 00:00 * 177.15972 -20.91208 0.11053828168861 1.634 1.10 3.99 0.000700
2022-Apr-20 00:00 * 174.87913 -20.65017 0.10669520062187 1.643 1.10 4.02 0.000740
2022-Apr-21 00:00 * 172.46216 -20.33210 0.10304356862850 1.645 1.10 4.01 0.000780
2022-Apr-22 00:00 * 169.90593 -19.95149 0.09959410882060 1.638 1.09 3.95 0.000820
2022-Apr-23 00:00 * 167.20916 -19.50186 0.09635833382557 1.622 1.06 3.85 0.000860
2022-Apr-24 00:00 * 164.37255 -18.97691 0.09334841178295 1.597 1.02 3.69 0.000897
2022-Apr-25 00:00 * 161.39919 -18.37085 0.09057698467950 1.564 0.95 3.47 0.000933
2022-Apr-26 00:00 * 158.29492 -17.67878 0.08805693339189 1.524 0.87 3.17 0.000967
2022-Apr-27 00:00 * 155.06854 -16.89714 0.08580108475942 1.482 0.77 2.80 0.000997
2022-Apr-28 00:00 * 151.73199 -16.02421 0.08382186079087 1.443 0.64 2.34 0.001022
2022-Apr-29 00:00 *m 148.30030 -15.06053 0.08213087820072 1.414 0.49 1.80 0.001043
2022-Apr-30 00:00 *m 144.79132 -14.00927 0.08073851653288 1.402 0.33 1.19 0.001059
2022-May-01 00:00 *m 141.22533 -12.87645 0.07965348334068 1.416 0.14 0.51 0.001068
2022-May-02 00:00 *m 137.62434 -11.67094 0.07888241309718 1.461 0.07 0.26 0.001070
2022-May-03 00:00 *m 134.01131 -10.40420 0.07842954044298 1.535 0.27 1.00 0.001064
2022-May-04 00:00 *m 130.40928 -9.08982 0.07829648612442 1.635 0.49 1.76 0.001052
2022-May-05 00:00 *m 126.84047 -7.74284 0.07848218467988 1.754 0.69 2.52 0.001032
2022-May-06 00:00 *m 123.32551 -6.37891 0.07898296745177 1.882 0.89 3.24 0.001004
2022-May-07 00:00 *m 119.88280 -5.01350 0.07979279558265 2.011 1.07 3.91 0.000971
2022-May-08 00:00 *m 116.52808 -3.66111 0.08090361925254 2.134 1.24 4.51 0.000931
2022-May-09 00:00 *m 113.27414 -2.33467 0.08230582543547 2.246 1.38 5.03 0.000885
2022-May-10 00:00 *m 110.13089 -1.04516 0.08398872939186 2.342 1.51 5.47 0.000835
2022-May-11 00:00 *m 107.10542 0.19866 0.08594106537325 2.421 1.61 5.84 0.000781
2022-May-12 00:00 *m 104.20228 1.39022 0.08815143810259 2.481 1.69 6.12 0.000724
2022-May-13 00:00 *m 101.42386 2.52503 0.09060870607162 2.523 1.74 6.34 0.000664
2022-May-14 00:00 * 98.77071 3.60048 0.09330227838259 2.547 1.79 6.49 0.000602
2022-May-15 00:00 * 96.24192 4.61553 0.09622231767675 2.555 1.81 6.59 0.000540
2022-May-16 00:00 * 93.83550 5.57043 0.09935985267410 2.548 1.82 6.63 0.000476
2022-May-17 00:00 * 91.54861 6.46643 0.10270681494578 2.529 1.83 6.64 0.000412
2022-May-18 00:00 * 89.37782 7.30553 0.10625602388130 2.498 1.82 6.61 0.000348
2022-May-19 00:00 * 87.31931 8.09022 0.11000114748045 2.459 1.80 6.56 0.000285
2022-May-20 00:00 * 85.36899 8.82336 0.11393666160235 2.411 1.78 6.48 0.000222
2022-May-21 00:00 * 83.52259 9.50797 0.11805781851969 2.358 1.76 6.39 0.000160
2022-May-22 00:00 * 81.77580 10.14720 0.12236062356188 2.299 1.73 6.29 0.000099
2022-May-23 00:00 * 80.12435 10.74414 0.12684181223507 2.237 1.70 6.18 0.000042
2022-May-24 00:00 * 78.56403 11.30189 0.13149882049910 2.172 1.67 6.06 0.000029
2022-May-25 00:00 * 77.09079 11.82341 0.13632974476319 2.105 1.63 5.94 0.000083
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-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
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 +100Hz (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 512
ncoh 16
bandwidth 245 Hz
resolution 0.48 Hz
TXOFF +50 Hz
---------------------------------------------------------------------
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