Goldstone Radar Observations Planning: (175706) 1996FG3


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 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


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)
                                                                          <- 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
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