Goldstone Radar Observations Planning: 2003 AF23 and 2016 CO247


Background



2003 AF23




2016 CO247




Orbital and Physical Characteristics  
Name                     2003 AF23                           2016 CO247
Asteroid number          Not numbered                        Not numbered
Discoverer               LINEAR                              Pan-STARRS 1
Discovery date           2003 January 8                      2016 February 12

Close approach distance  0.0467 au  (18.2 lunar distances)   0.0495 au (19.3 lunar distances)
Close approach date      2021 Jan  3                         2021 Jan  6

Orbit type               Aten                                Apollo
semimajor axis           0.875 au                            1.420 au
eccentricity             0.426                               0.514
inclination              23.2 deg                            18.3
Orbital period           0.818 years                         1.69 y
perihelion distance      0.502 au                            0.691 au
aphelion distance        1.247 au                            2.150 au
MOID                     0.032 au                            0.0165 au

absolute magnitude (H)   20.9                                20.5
diameter                ~0.21 km                            ~0.25 km
optical albedo           unknown                             unknown
rotation period         ~7 h                                 unknown
lightcurve amplitude     unknown                             unknown
pole direction           unknown                             unknown
spectral class           unknown                             unknown
PHA?                     Yes                                 Yes

Last update: 2021 January 5

Discovery M.P.E.C.

2003 AF23
https://www.minorplanetcenter.net/mpec/K03/K03A62.html

2016 CO247
https://www.minorplanetcenter.net/mpec/K16/K16CJ7.html


SNR Calculations

Goldstone SNRs

2003 AF23
2003 AF23:  D = 0.21 km,  P = 2.2 h,  OC albedo = 0.1
SNRs assume Ptx = 450 kW
wk start date    window        RA, dec   dist   runs   SNR/day   SNR/run
53 2020 Dec 31  08:06-19:32   191, +34  0.055    386      31        2
53 2021 Jan 01  07:23-18:45   180, +34  0.051    417      43        2
53 2021 Jan 02  06:36-17:51   169, +33  0.048    437      53        3   
53 2021 Jan 03  05:50-16:52   157, +30  0.047    441      59        3    el > 75 deg 1018-1226
 1 2021 Jan 04  05:08-15:54   145, +27  0.047    426      57        3    el > 75 deg 0937-1127
 1 2021 Jan 05  04:31-14:59   135, +23  0.049    396      48        3    el > 75 deg 0912-1021
 1 2021 Jan 06  04:02-14:11   126, +18  0.052    357      36        2 
 1 2021 Jan 07  03:38-13:29   119, +14  0.057    317      25        2


2016 CO247
2016 CO247:  D = 0.25 km,  P = 2.2 h,  OC albedo = 0.1
wk start date    window        RA, dec   dist   runs   SNR/day   SNR/run
53 2021 Jan 02  10:20-21:36   225, +32  0.060    349      28        2
53 2021 Jan 03  09:37-20:55   215, +33  0.055    382      39        2
 1 2021 Jan 04  08:49-20:06   204, +33  0.052    408      51        3    1320-1535: el > 75 deg
 1 2021 Jan 05  07:58-19:10   192, +32  0.050    421      59        3    1225-1440: el > 75 deg
 1 2021 Jan 06  07:09-18:11   180, +30  0.050    416      60        3    1135-1345: el > 75 deg
 1 2021 Jan 07  06:26-17:14   168, +27  0.051    394      53        3    1055-1245: el > 75 deg
 1 2021 Jan 08  05:50-16:23   158, +23  0.054    361      41        2
 1 2021 Jan 09  05:21-15:39   150, +20  0.059    324      30        2


Track Assignments


DOY  BOA   BOT   EOT   EOA
003  0635  0805  1500  1530  DSS-14 GSSR AST 2003 AF23
003        1015  1500  1530  DSS-14 GSSR METEOR Quadrantids
003        1015  1500  1530  DSS-25 GSSR METEOR Quadratids
004  0830  1000  1430  1500  DSS-14 GSSR AST 2016 CO247/2003 AF23

Goldstone tracks:
     UT                 UT         PST                  Duration Round-trip     
DOY  Date               TX Window  TX Window            hh:mm    time (sec) SNR/RTT 
003  Jan  3  2003 AF23  0805 1500  0005-0700 Jan  3      6:55      47         3 

004  Jan  4  2016 CO247 1000 1430  0200-0630 Jan  4      4:30      52         3             
004  Jan  4  2003 AF23  1000 1430  0200-0630 Jan  4      4:30      47         3



Uncertainties

2003 AF23
JPL/Horizons solution 34, # obs: 274 (2003-2017) 
2021 Jan  5
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.            delta POS_3sigma  DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2020-Dec-27 00:00 *m  219.21889  29.53278 0.08432364344949      3.372        1.94        7.07       0.000733
 2020-Dec-28 00:00 *m  215.06631  30.58311 0.07702291610881      3.628        2.11        7.66       0.000675
 2020-Dec-29 00:00 *m  209.96572  31.66305 0.07009551575652      3.917        2.35        8.54       0.000622
 2020-Dec-30 00:00 *   203.65366  32.68969 0.06367049932916      4.232        2.69        9.79       0.000578
 2020-Dec-31 00:00 *   195.84694  33.50030 0.05792401936139      4.547        3.13       11.36       0.000554
 2021-Jan-01 00:00 *   186.33878  33.81889 0.05308737757125      4.810        3.59       13.04       0.000561
 2021-Jan-02 00:00 *   175.19262  33.26585 0.04944056200710      4.939        3.93       14.29       0.000608
 2021-Jan-03 00:00 *   162.95756  31.48723 0.04727348081625      4.844        3.96       14.41       0.000690
 2021-Jan-04 00:00 *   150.64323  28.40451 0.04680684185496      4.489        3.57       12.99       0.000789
 2021-Jan-05 00:00 *   139.30040  24.36447 0.04810519638549      3.944        2.88       10.46       0.000883
 2021-Jan-06 00:00 *   129.56056  19.96794 0.05104879128106      3.344        2.16        7.84       0.000959
 2021-Jan-07 00:00 *   121.54991  15.74571 0.05538996144839      2.801        1.65        6.00       0.001016
 2021-Jan-08 00:00 *   115.08825  11.99277 0.06084334493972      2.361        1.42        5.18       0.001058
 2021-Jan-09 00:00 *   109.89565   8.79705 0.06715049973330      2.022        1.39        5.05       0.001091
 2021-Jan-10 00:00 *   105.70258   6.13120 0.07410462489795      1.763        1.43        5.21       0.001121
 2021-Jan-11 00:00 *   102.28662   3.92356 0.08155014737941      1.563        1.49        5.43       0.001151
 2021-Jan-12 00:00 *    99.47535   2.09531 0.08937303011114      1.405        1.55        5.63       0.001181

2016 CO247
JPL/Horizons solution 18, # obs: 62 (2016-2021)
2021 January 5
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.            delta POS_3sigma  DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2020-Dec-29 00:00 *m  250.79868  24.97968 0.09274155152900      1.465        1.14        4.14       0.001228
 2020-Dec-30 00:00 *   247.16146  26.30698 0.08477884977618      1.431        1.18        4.28       0.001267
 2020-Dec-31 00:00 *   242.70213  27.75513 0.07719565680251      1.344        1.17        4.25       0.001306
 2021-Jan-01 00:00 *   237.17515  29.29116 0.07010892331966      1.189        1.08        3.94       0.001342
 2021-Jan-02 00:00 *   230.28261  30.82425 0.06368011676786      0.979        0.88        3.21       0.001370
 2021-Jan-03 00:00 *   221.72151  32.16317 0.05812572352806      0.886        0.72        2.61       0.001383
 2021-Jan-04 00:00 *   211.32330  32.97978 0.05371820043424      1.286        1.26        4.58       0.001366
 2021-Jan-05 00:00 *   199.30420  32.84482 0.05076086278608      2.131        2.46        8.95       0.001307
 2021-Jan-06 00:00 *   186.46464  31.41973 0.04952117726545      3.108        3.82       13.89       0.001196
 2021-Jan-07 00:00 *   173.99654  28.72856 0.05013671334210      3.930        4.85       17.63       0.001038
 2021-Jan-08 00:00 *   162.90846  25.20888 0.05255474916847      4.413        5.25       19.06       0.000854
 2021-Jan-09 00:00 *   153.63919  21.44146 0.05655871674849      4.540        5.05       18.37       0.000667
 2021-Jan-10 00:00 *   146.13927  17.86387 0.06185663061983      4.410        4.52       16.44       0.000497



Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination: 2003 AF23 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2020-Dec-23 00:00 229.97243 26.06147 0.11574630496382 20.233 n.a. 63.8986 /L 136.0/ 59.7476 2020-Dec-24 00:00 227.91576 26.82380 0.10765797428122 19.967 n.a. 66.4037 /L 140.5/ 68.7819 2020-Dec-25 00:00 225.50969 27.65660 0.09969844793192 19.681 n.a. 69.2178 /L 140.9/ 77.1206 2020-Dec-26 00:00 222.66024 28.56607 0.09190315840674 19.372 n.a. 72.4139 /L 136.7/ 84.5247 2020-Dec-27 00:00 219.24250 29.55307 0.08432071896140 19.037 n.a. 76.0863 /L 128.5/ 90.7513 2020-Dec-28 00:00 215.09099 30.60636 0.07701827444543 18.675 n.a. 80.3560 /L 117.5/ 95.5543 2020-Dec-29 00:00 209.99098 31.68992 0.07008898888962 18.285 n.a. 85.3757 /L 104.2/ 98.6948 2020-Dec-30 00:00 203.67846 32.72091 0.06366191550912 17.869 n.a. 91.3295 /L 89.0/ 99.9604 2020-Dec-31 00:00 195.86941 33.53651 0.05791323658985 17.433 n.a. 98.4178 /L 72.0/ 99.1908 2021-Jan-01 00:00 186.35606 33.86024 0.05307434965552 16.989 n.a. 106.8099 /L 53.5/ 96.3041 2021-Jan-02 00:00 175.20128 33.31143 0.04942544023586 16.560 n.a. 116.5441 /L 34.0/ 91.3179 2021-Jan-03 00:00 162.95506 31.53464 0.04725671447114 16.174 n.a. 127.3825 /L 17.6/ 84.3623 2021-Jan-04 00:00 150.62973 28.45044 0.04678918335195 15.860 n.a. 138.7112 /L 22.4/ 75.6822 2021-Jan-05 00:00 139.27867 24.40616 0.04808753831572 15.636 n.a. 149.6161 /L 42.3/ 65.6315 2021-Jan-06 00:00 129.53427 20.00420 0.05103191822765 15.502 n.a. 159.0754 /L 63.9/ 54.6627 2021-Jan-07 00:00 121.52202 15.77670 0.05537439377889 15.471 n.a. 165.8958 /L 84.8/ 43.3122 2021-Jan-08 00:00 115.06059 12.01925 0.06082933637913 15.594 n.a. 168.4459 /L 104.5/ 32.1808 2021-Jan-09 00:00 109.86917 8.81992 0.06713811689273 15.880 n.a. 166.7064 /T 122.7/ 21.9020 2021-Jan-10 00:00 105.67767 6.15122 0.07409383044624 16.220 n.a. 163.1967 /T 139.0/ 13.0947 2021-Jan-11 00:00 102.26340 3.94132 0.08154085717222 16.551 n.a. 159.4817 /T 151.9/ 6.2986 2021-Jan-12 00:00 99.45378 2.11127 0.08936514524502 16.858 n.a. 156.0174 /T 157.2/ 1.9060 2021-Jan-13 00:00 97.11816 0.59002 0.09748356161064 17.140 n.a. 152.8917 /T 151.9/ 0.1093 2021-Jan-14 00:00 95.15819 -0.68147 0.10583515060486 17.399 n.a. 150.0906 /T 140.8/ 0.8854 2021-Jan-15 00:00 93.49951 -1.75060 0.11437468286177 17.639 n.a. 147.5745 /T 128.2/ 4.0210 2021-Jan-16 00:00 92.08541 -2.65491 0.12306809955016 17.861 n.a. 145.3013 /T 115.4/ 9.1717 2021-Jan-17 00:00 90.87222 -3.42400 0.13188934401981 18.068 n.a. 143.2335 /T 102.8/ 15.9298 2021-Jan-18 00:00 89.82591 -4.08128 0.14081815912125 18.261 n.a. 141.3390 /T 90.7/ 23.8820 2021-Jan-19 00:00 88.91966 -4.64536 0.14983854423500 18.442 n.a. 139.5913 /T 79.1/ 32.6462 2021-Jan-20 00:00 88.13212 -5.13112 0.15893766219674 18.612 n.a. 137.9685 /T 68.0/ 41.8855 2021-Jan-21 00:00 87.44611 -5.55058 0.16810505544017 18.772 n.a. 136.4526 /T 57.5/ 51.3045 2021-Jan-22 00:00 86.84766 -5.91348 0.17733207743217 18.924 n.a. 135.0289 /T 47.8/ 60.6353 2021-Jan-23 00:00 86.32533 -6.22782 0.18661147629022 19.068 n.a. 133.6849 /T 39.4/ 69.6190 2021-Jan-24 00:00 85.86964 -6.50020 0.19593708764177 19.205 n.a. 132.4104 /T 33.2/ 77.9876 2021-Jan-25 00:00 85.47267 -6.73610 0.20530360698639 19.336 n.a. 131.1968 /T 30.5/ 85.4507 2016 CO247 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2020-Dec-25 00:00 260.27601 20.81951 0.12704455140228 21. n.a. 46.1773 /L 126.0/ 77.1206 2020-Dec-26 00:00 258.45882 21.71636 0.11819543652719 21. n.a. 47.8887 /L 132.1/ 84.5247 2020-Dec-27 00:00 256.33449 22.70154 0.10950752887918 21. n.a. 49.9037 /L 135.3/ 90.7513 2020-Dec-28 00:00 253.82416 23.78937 0.10101195418069 20. n.a. 52.2881 /L 134.6/ 95.5543 2020-Dec-29 00:00 250.82239 24.99344 0.09275182409648 20. n.a. 55.1263 /L 129.6/ 98.6948 2020-Dec-30 00:00 247.18760 26.32272 0.08478712505515 19.640 n.a. 58.5270 /L 121.0/ 99.9604 2020-Dec-31 00:00 242.73086 27.77338 0.07720162131899 19.197 n.a. 62.6288 /L 109.5/ 99.1908 2021-Jan-01 00:00 237.20638 29.31266 0.07011219669062 18.719 n.a. 67.6020 /L 95.7/ 96.3041 2021-Jan-02 00:00 230.31577 30.84990 0.06368025702494 18.212 n.a. 73.6422 /L 80.3/ 91.3179 2021-Jan-03 00:00 221.75506 32.19391 0.05812226431670 17.693 n.a. 80.9384 /L 63.5/ 84.3623 2021-Jan-04 00:00 211.35432 33.01618 0.05371074781427 17.184 n.a. 89.5983 /L 46.4/ 75.6822 2021-Jan-05 00:00 199.32863 32.88630 0.05074926477598 16.721 n.a. 99.5217 /L 32.8/ 65.6315 2021-Jan-06 00:00 186.47896 31.46400 0.04950570780651 16.340 n.a. 110.2783 /L 31.6/ 54.6627 2021-Jan-07 00:00 173.99988 28.77226 0.05011811987759 16.066 n.a. 121.1282 /L 45.2/ 43.3122 2021-Jan-08 00:00 162.90273 25.24914 0.05253406528116 15.906 n.a. 131.2602 /L 64.6/ 32.1808 2021-Jan-09 00:00 153.62742 21.47689 0.05653696215824 15.843 n.a. 140.0850 /L 85.1/ 21.9020 2021-Jan-10 00:00 146.12411 17.89439 0.06183460806064 15.856 n.a. 147.3459 /L 105.1/ 13.0947 2021-Jan-11 00:00 140.11878 14.71735 0.06814147631401 15.923 n.a. 153.0368 /L 124.0/ 6.2986 2021-Jan-12 00:00 135.30108 11.99929 0.07522009261906 16.030 n.a. 157.2727 /L 141.5/ 1.9060 2021-Jan-13 00:00 131.40203 9.71182 0.08288881997875 16.167 n.a. 160.2097 /L 156.6/ 0.1093 2021-Jan-14 00:00 128.21045 7.79711 0.09101417281103 16.328 n.a. 162.0244 /L 165.0/ 0.8854 2021-Jan-15 00:00 125.56691 6.19359 0.09949951092031 16.506 n.a. 162.9190 /L 159.4/ 4.0210 2021-Jan-16 00:00 123.35240 4.84603 0.10827495428530 16.697 n.a. 163.1135 /L 147.3/ 9.1717 2021-Jan-17 00:00 121.47799 3.70820 0.11728967254493 16.893 n.a. 162.8169 /L 134.2/ 15.9298 2021-Jan-18 00:00 119.87672 2.74258 0.12650634801861 17.088 n.a. 162.2008 /T 121.3/ 23.8820 2021-Jan-19 00:00 118.49762 1.91910 0.13589729539340 17.281 n.a. 161.3896 /T 108.7/ 32.6462 2021-Jan-20 00:00 117.30147 1.21373 0.14544175799995 17.467 n.a. 160.4667 /T 96.5/ 41.8855 2021-Jan-21 00:00 116.25770 0.60722 0.15512401689652 17.647 n.a. 159.4852 /T 84.6/ 51.3045 2021-Jan-22 00:00 115.34223 0.08408 0.16493205742232 17.820 n.a. 158.4778 /T 73.0/ 60.6353 2021-Jan-23 00:00 114.53588 -0.36824 0.17485661947137 17.986 n.a. 157.4641 /T 61.8/ 69.6190 2021-Jan-24 00:00 113.82318 -0.75998 0.18489051443522 18.146 n.a. 156.4557 /T 51.0/ 77.9876 2021-Jan-25 00:00 113.19155 -1.09955 0.19502812986222 18.299 n.a. 155.4591 /T 40.9/ 85.4507 2021-Jan-26 00:00 112.63068 -1.39391 0.20526506808727 18.446 n.a. 154.4776 /T 32.3/ 91.6921 2021-Jan-27 00:00 112.13199 -1.64889 0.21559788155280 18.587 n.a. 153.5129 /T 26.9/ 96.3782 2021-Jan-28 00:00 111.68836 -1.86937 0.22602387810260 18.724 n.a. 152.5653 /T 27.2/ 99.1834 2021-Jan-29 00:00 111.29376 -2.05947 0.23654097617026 18.855 n.a. 151.6346 /T 33.1/ 99.8288 2021-Jan-30 00:00 110.94311 -2.22270 0.24714759405833 18.982 n.a. 150.7201 /T 42.6/ 98.1300 2021-Jan-31 00:00 110.63209 -2.36208 0.25784256074110 19.105 n.a. 149.8210 /T 53.9/ 94.0400 2021-Feb-01 00:00 110.35698 -2.48018 0.26862503881430 19.224 n.a. 148.9365 /T 66.1/ 87.6767 2021-Feb-02 00:00 110.11463 -2.57927 0.27949445372840 19.339 n.a. 148.0656 /T 78.7/ 79.3242 2021-Feb-03 00:00 109.90230 -2.66128 0.29045042689664 19.451 n.a. 147.2075 /T 91.4/ 69.4105 2021-Feb-04 00:00 109.71763 -2.72794 0.30149271288668 19.559 n.a. 146.3612 /T 104.1/ 58.4687 2021-Feb-05 00:00 109.55858 -2.78075 0.31262114216108 19.665 n.a. 145.5262 /T 116.6/ 47.0930

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
ncoh              1 
bandwidth       787 Hz   
FFT             128
resolution       6.15 Hz
TXoffset       +100 Hz  (echo in column 80)
---------------------------------------------------------------------------
11-usec 
baud             11 usec
code            127
PRP            1397 usec
ncoh              1 
bandwidth       716 Hz   
FFT             128
resolution      5.6 Hz
TXoffset     +100 Hz  (echo in column 82) 
-------------------------------------------------------------------------
1-usec 
baud              1 usec
code            511
ncoh              4
bandwidth       489.2 Hz   
FFT             128
resolution        3.8 Hz
TXoffset       +100 Hz  (echo in column 91)
---------------------------------------------------------------------

Instructions

NOTE: Data should be moved to the appropriate subdirectories in aardvark:/export/data0/2003af23/raw/

POINTING:

  OSOD and predicts will be on aardvark:

/export/data3/osod/ops/2003af23/EPH.OUT.s???
/export/data3/osod/ops/2003af23/PRDX.OUT.14f-14-14.s???
/export/data3/osod/ops/2003af23/PRDX.OUT.14v-14-14.s???
/export/data3/osod/ops/2003af23/PUNCH.OUT.14f-14-14.s???
/export/data3/osod/ops/2003af23/PUNCH.OUT.14v-14-14.s???


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

...Not available yet...

Transmit offsets are given in millidegrees.  



PRDX.OUT.14f-14-14.?? TARGET IS A#0000 ET-UT(FIRST POINT) = 69.182398682 ET-UT1(FIRST POINT) = 69.357566315 TRANSMITTER: STATION #14, RECEIVER: STATION #14 RECEIVER U.T. RANGE DOPPLER AZI DEC RA EL D-DOP D-RANGE ...Not available yet...

2003 AF23 GOLDSTONE MASTERLOG

============================================================================== Receive TX Setup code ncoh FFT runs start -stop OSOD offset 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 https://echo.jpl.nasa.gov/asteroids/2003AF23/2003af23.2016co247.2021.goldstone.planning.html

Asteroid Radar Astronomy
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