Goldstone Radar Observations Planning: 2012 BA35


Background


2012 BA35    
2012 BA35 is a object in the realm of 60 meters in diameter that will approach within 
7 lunar distances (0.018 au) on 2021 August 11.  Nothing else is known about its physical
properties.  

This asteroid was discovered by Pan-STARRS 1 in January, 2012. 

We expect signal-to-noise ratios strong enough for CW and ranging echoes
but probably not strong enough for delay-Doppler imaging.

2012 BA35 has an orbit similar to Earth's and is on the NHATS list of 
mission-accessible targets.  

The pointing, Doppler, and time delay uncertainties for this object are large with
JPL/Horizons solution 12 (late May, 2021).  Additional astrometry would be very welcome.


Orbital and Physical Characteristics  
Name                     2012 BA35
Asteroid number          not numbered   
Discoverer               Pan-STARRS 1
Discovery date           2012 Jan 25
Orbit type               Apollo
Close approach distance  0.0176 au
Close approach distance  6.8 lunar distances
Close approach date      2021 Aug 11

semimajor axis           1.072 au
eccentricity             0.118
inclination              5.7 deg
Orbital period           1.11 y
perihelion distance      0.945 au
aphelion distance        1.198 au
MOID                     0.0176 au

absolute magnitude (H)   23.8
diameter                ~60 meters
optical albedo           unknown
rotation period          unknown
lightcurve amplitude     unknown
spectral class           unknown
PHA?                     No

Last update: 2021 May 25


Discovery M.P.E.C.


2012 BA35
https://www.minorplanetcenter.net/mpec/K12/K12B64.html


SNR Calculations

Goldstone SNRs
2012 BA35
2012 BA35:  D = 0.06 km,  P = 0.5 h,  OC albedo = 0.1

w  DOY       start date       window       RA, dec   dist  runs  SNR/day SNR/run
30 213-214  2021 Aug 01-02  21:16-11:36   260, +57  0.028   934     38      1
31 214-215  2021 Aug 02-03  20:44-11:24   255, +59  0.026  1024     50      2
31 215-216  2021 Aug 03-04  20:06-11:08   249, +62  0.025  1128     65      2
31 216-217  2021 Aug 04-05  19:19-10:45   241, +64  0.023  1245     86      3
31 217-218  2021 Aug 05-06  18:23-10:11   231, +65  0.022  1370    110      3
31 218-219  2021 Aug 06-07  17:20-09:19   218, +67  0.020  1486    140      4 
31 219-220  2021 Aug 07-08  16:16-08:09   203, +66  0.019  1566    180      5 *              Scheduled Aug 8 0155-0325
31 220-221  2021 Aug 08-09  15:20-06:46   188, +65  0.018  1586    210      6 *              Scheduled Aug 8 1520-1830
32 221-222  2021 Aug 09-10  14:41-05:25   174, +61  0.018  1552    240      7 
32 222-223  2021 Aug 10-11  14:15-04:13   163, +57  0.018  1484    250      7 
32 223-224  2021 Aug 11-12  13:58-03:13   154, +51  0.018  1395    240      7    el > 75 deg
32 224-225  2021 Aug 12-13  13:48-02:24   147, +45  0.018  1294    210      6 *  1915-2115   Scheduled 1345-1530,2245-0140
32 225-226  2021 Aug 13-14  13:42-01:43   142, +38  0.019  1186    180      6 *  1835-2100   Scheduled 1340-1820,2035-2205
32 226-227  2021 Aug 14-15  13:38-01:08   138, +33  0.020  1077    140      5    1820-2036
32 227-228  2021 Aug 15-16  13:36-00:38   135, +27  0.021   973    110      4 
33 228-229  2021 Aug 16-17  13:34-00:13   132, +22  0.022   876     84      3
33 229      2021 Aug 17     13:33-23:50   130, +18  0.024   789     63      2
33 230      2021 Aug 18     13:32-23:30   129, +14  0.025   711     47      2
33 231      2021 Aug 19     13:31-23:12   127, +11  0.027   643     35      1

The SNRs should be sufficient to detect echoes even if the rotation period is as 
fast as a few minutes (assuming D ~ 60 m and the radar albedo >=0.1).


Track Assignments


DOY    BOA   BOT   EOT   EOA
220    0025  0155  0325  0355  GSSR Ast 2012 BA35
220    1350  1520  1830  1900  GSSR Ast 2012 BA35
225    1215  1345  1530  1600  GSSR Ast 2012 BA35
225    2115  2245  0140  0210  GSSR Ast 2012 BA35
226    1210  1340  1820  1850  GSSR Ast 2012 BA35
226    1905  2035  2205  2235  GSSR Ast 2012 BA35

Goldstone tracks:
        UT                   UT         PDT               Duration Round-trip     
DOY     Date      Target     TX Window  TX Window         hh:mm    time (sec)   SNR/run  Observer
220     Aug  8    2012 BA35  0155-0325  1855-2025 Aug  7   1:30        19          5 

220     Aug  8    2012 BA35  1520-1830  0820-1130 Aug  8   3:10        18          6

223     Aug 11    Perseids   1200-1500  0500-0800 Aug 11   3:00

224     Aug 12    Perseids   1200-1430  0500-0730 Aug 12   2:30        

225     Aug 13    2012 BA35  1345-1530  0645-0830 Aug 13   1:45        19          6
225-226 Aug 13-14 2012 BA35  2245-0140  1545-1840 Aug 13   2:55        19          6

226     Aug 14    2012 BA35  1340-1820  0640-1120 Aug 14   5:40        20          6
226     Aug 14    2012 BA35  2035-2205  1335-1505 Aug 14   1:30        20          6

Gaps in the schedules on Aug 13 and 14 are due to elevations above 75 deg, 
where tracking is difficult.  



Uncertainties

2012 BA35
JPL/Horizons solution 12, # obs: 55 (2011-2012), OCC = 3
2021 May 25
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.            delta POS_3sigma  DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2021-Jun-25 00:00 *   287.00162  26.06036 0.11304625134171    766.126      122.71      445.97       0.028165
 2021-Jun-26 00:00 *   286.90355  26.55471 0.11060224374498    785.195      123.38      448.41       0.023178
 2021-Jun-27 00:00 *   286.79403  27.05052 0.10817382559550    804.898      124.03      450.76       0.018164
 2021-Jun-28 00:00 *   286.67261  27.54801 0.10576049339512    825.271      124.65      453.02       0.013123
 2021-Jun-29 00:00 *   286.53887  28.04739 0.10336179964992    846.355      125.23      455.15       0.008057
 2021-Jun-30 00:00 *   286.39235  28.54886 0.10097733217176    868.194      125.77      457.12       0.002974
 2021-Jul-01 00:00 *   286.23263  29.05268 0.09860669629751    890.836      126.26      458.89       0.002169
 2021-Jul-02 00:00 *   286.05927  29.55913 0.09624950217034    914.331      126.68      460.42       0.007290
 2021-Jul-03 00:00 *   285.87181  30.06853 0.09390535706477    938.739      127.03      461.67       0.012438
 2021-Jul-04 00:00 *   285.66979  30.58128 0.09157386159749    964.120      127.29      462.62       0.017602
 2021-Jul-05 00:00 *   285.45271  31.09783 0.08925460838554    990.546      127.45      463.22       0.022776
 2021-Jul-06 00:00 *   285.22003  31.61872 0.08694718191449   1018.092      127.51      463.42       0.027958
 2021-Jul-07 00:00 *m  284.97118  32.14460 0.08465115876953   1046.845      127.44      463.18       0.033143
 2021-Jul-08 00:00 *m  284.70551  32.67621 0.08236610781171   1076.900      127.24      462.45       0.038326
 2021-Jul-09 00:00 *m  284.42231  33.21444 0.08009159029332   1108.363      126.89      461.16       0.043502
 2021-Jul-10 00:00 *m  284.12075  33.76032 0.07782716027736   1141.353      126.36      459.26       0.048666
 2021-Jul-11 00:00 *m  283.79992  34.31507 0.07557236602292   1176.006      125.65      456.67       0.053811
 2021-Jul-12 00:00 *m  283.45871  34.88012 0.07332675317951   1212.472      124.73      453.32       0.058929
 2021-Jul-13 00:00 *m  283.09585  35.45717 0.07108987066510   1250.922      123.57      449.12       0.064014
 2021-Jul-14 00:00 *m  282.70977  36.04817 0.06886127999472   1291.551      122.16      443.99       0.069057
 2021-Jul-15 00:00 *m  282.29859  36.65541 0.06664056864836   1334.578      120.47      437.83       0.074047
 2021-Jul-16 00:00 *m  281.85996  37.28158 0.06442736791891   1380.255      118.46      430.53       0.078976
 2021-Jul-17 00:00 *m  281.39100  37.92974 0.06222137563652   1428.869      116.11      421.99       0.083832
 2021-Jul-18 00:00 *m  280.88813  38.60345 0.06002238420293   1480.745      113.38      412.06       0.088603
 2021-Jul-19 00:00 *m  280.34684  39.30676 0.05783031434988   1536.260      110.22      400.59       0.093275
 2021-Jul-20 00:00 *m  279.76154  40.04430 0.05564525475704   1595.842      106.59      387.38       0.097833
 2021-Jul-21 00:00 *m  279.12521  40.82133 0.05346750701736   1659.986      102.41      372.20       0.102261
 2021-Jul-22 00:00 *   278.42909  41.64377 0.05129763462179   1729.260       97.60      354.73       0.106539
 2021-Jul-23 00:00 *   277.66225  42.51828 0.04913651429017   1804.319       92.05      334.54       0.110645
 2021-Jul-24 00:00 *   276.81098  43.45236 0.04698538894701   1885.920       85.59      311.06       0.114552
 2021-Jul-25 00:00 *   275.85805  44.45440 0.04484592432897   1974.941       78.01      283.53       0.118227
 2021-Jul-26 00:00 *   274.78163  45.53379 0.04272027498868   2072.403       69.04      250.91       0.121630
 2021-Jul-27 00:00 *   273.55371  46.70098 0.04061116894995   2179.490       58.30      211.88       0.124708
 2021-Jul-28 00:00 *   272.13789  47.96747 0.03852202244192   2297.581       45.31      164.69       0.127395
 2021-Jul-29 00:00 *   270.48605  49.34564 0.03645709713678   2428.270       29.46      107.07       0.129609
 2021-Jul-30 00:00 *   268.53350  50.84816 0.03442171315438   2573.385        9.92       36.06       0.131242
 2021-Jul-31 00:00 *   266.19171  52.48677 0.03242253266686   2734.991       14.37       52.23       0.132153
 2021-Aug-01 00:00 *   263.33735  54.26976 0.03046793117353   2915.348       44.75      162.65       0.132164
 2021-Aug-02 00:00 *   259.79614  56.19700 0.02856847494944   3116.793       82.96      301.50       0.131043
 2021-Aug-03 00:00 *   255.31971  58.25066 0.02673752028843   3341.484      131.10      476.47       0.128492
 2021-Aug-04 00:00 *   249.55713  60.37794 0.02499193599172   3590.877      191.60      696.37       0.124137
 2021-Aug-05 00:00 *m  242.03600  62.46116 0.02335291236453   3864.800      266.94      970.18       0.117514
 2021-Aug-06 00:00 *m  232.21007  64.27222 0.02184673748363   4159.911      358.92     1304.48       0.108082
 2021-Aug-07 00:00 *m  219.71335  65.42665 0.02050527100692   4467.458      467.37     1698.63       0.095256
 2021-Aug-08 00:00 *m  204.93628  65.40561 0.01936562409746   4770.658      588.08     2137.36       0.078511 *
 2021-Aug-09 00:00 *m  189.46286  63.74681 0.01846834107068   5042.988      710.74     2583.17       0.057545
 2021-Aug-10 00:00 *m  175.34821  60.32816 0.01785342434316   5249.882      818.50     2974.81       0.032508
 2021-Aug-11 00:00 *m  163.77891  55.44099 0.01755423532029   5356.307      891.65     3240.68       0.004183
 2021-Aug-12 00:00 *m  154.81209  49.60443 0.01759073477400   5339.161      915.53     3327.46       0.026047
 2021-Aug-13 00:00 *m  147.97243  43.35905 0.01796482727939   5197.683      887.92     3227.12       0.056446 *
 2021-Aug-14 00:00 *m  142.72558  37.15110 0.01866020178868   4954.025      819.85     2979.70       0.085424 *
 2021-Aug-15 00:00 *m  138.64152  31.28866 0.01964671580434   4643.504      729.17     2650.13       0.111873
 2021-Aug-16 00:00 *m  135.40855  25.94418 0.02088699688376   4301.970      632.68     2299.46       0.135277
 2021-Aug-17 00:00 *m  132.80761  21.18340 0.02234250260460   3957.534      541.78     1969.07       0.155603
 2021-Aug-18 00:00 *m  130.68495  17.00212 0.02397753780422   3628.284      462.09     1679.43       0.173108
 2021-Aug-19 00:00 *m  128.93150  13.35785 0.02576115112659   3323.765      395.15     1436.16       0.188176
 2021-Aug-20 00:00 *   127.46862  10.19174 0.02766753876251   3047.621      340.28     1236.75       0.201210


Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination: 2012 BA35 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2021-Jun-25 00:00 286.98675 26.07661 0.11303674875677 21.016 n.a. 128.9666 /L 52.5/ 99.8874 2021-Jun-26 00:00 286.88804 26.57124 0.11059346884636 20.972 n.a. 128.7754 /L 52.1/ 97.7802 2021-Jun-27 00:00 286.77785 27.06734 0.10816578785922 20.928 n.a. 128.5639 /L 54.6/ 93.0860 2021-Jun-28 00:00 286.65574 27.56512 0.10575320235922 20.884 n.a. 128.3317 /L 59.3/ 86.2946 2021-Jun-29 00:00 286.52127 28.06479 0.10335526490272 20.839 n.a. 128.0784 /L 65.4/ 77.9701 2021-Jun-30 00:00 286.37399 28.56655 0.10097156334158 20.795 n.a. 127.8037 /L 72.3/ 68.6638 2021-Jul-01 00:00 286.21347 29.07067 0.09860170304701 20.750 n.a. 127.5070 /L 79.5/ 58.8627 2021-Jul-02 00:00 286.03927 29.57741 0.09624529419707 20.704 n.a. 127.1880 /L 86.7/ 48.9747 2021-Jul-03 00:00 285.85094 30.08710 0.09390194410807 20.658 n.a. 126.8460 /L 93.7/ 39.3365 2021-Jul-04 00:00 285.64800 30.60014 0.09157125345165 20.612 n.a. 126.4807 /L 100.3/ 30.2324 2021-Jul-05 00:00 285.42996 31.11698 0.08925281491860 20.566 n.a. 126.0912 /L 106.3/ 21.9149 2021-Jul-06 00:00 285.19628 31.63817 0.08694621309268 20.519 n.a. 125.6770 /T 111.7/ 14.6201 2021-Jul-07 00:00 284.94637 32.16434 0.08465102468779 20.471 n.a. 125.2372 /T 116.0/ 8.5768 2021-Jul-08 00:00 284.67958 32.69625 0.08236681873122 20.423 n.a. 124.7709 /T 119.1/ 4.0062 2021-Jul-09 00:00 284.39520 33.23476 0.08009315668791 20.374 n.a. 124.2771 /T 120.7/ 1.1144 2021-Jul-10 00:00 284.09240 33.78093 0.07782959289103 20.325 n.a. 123.7546 /T 120.6/ 0.0774 2021-Jul-11 00:00 283.77025 34.33596 0.07557567594138 20.275 n.a. 123.2021 /T 118.9/ 1.0225 2021-Jul-12 00:00 283.42765 34.90129 0.07333095191883 20.224 n.a. 122.6180 /T 115.6/ 4.0090 2021-Jul-13 00:00 283.06331 35.47860 0.07109497028050 20.173 n.a. 122.0005 /T 111.0/ 9.0127 2021-Jul-14 00:00 282.67565 36.06986 0.06886729321247 20.120 n.a. 121.3475 /T 105.4/ 15.9153 2021-Jul-15 00:00 282.26279 36.67736 0.06664750902342 20.067 n.a. 120.6565 /T 99.2/ 24.4990 2021-Jul-16 00:00 281.82237 37.30376 0.06443525002062 20.013 n.a. 119.9247 /T 92.7/ 34.4459 2021-Jul-17 00:00 281.35149 37.95214 0.06223021526417 19.958 n.a. 119.1487 /T 86.2/ 45.3390 2021-Jul-18 00:00 280.84654 38.62604 0.06003219863220 19.903 n.a. 118.3245 /T 80.0/ 56.6667 2021-Jul-19 00:00 280.30302 39.32951 0.05784112260987 19.846 n.a. 117.4476 /T 74.7/ 67.8341 2021-Jul-20 00:00 279.71529 40.06718 0.05565707793509 19.788 n.a. 116.5125 /T 70.5/ 78.1905 2021-Jul-21 00:00 279.07632 40.84428 0.05348036858575 19.730 n.a. 115.5129 /T 67.9/ 87.0794 2021-Jul-22 00:00 278.37733 41.66672 0.05131156077722 19.670 n.a. 114.4415 /T 67.3/ 93.9113 2021-Jul-23 00:00 277.60733 42.54116 0.04915153429397 19.610 n.a. 113.2896 /T 68.6/ 98.2474 2021-Jul-24 00:00 276.75257 43.47505 0.04700153545237 19.550 n.a. 112.0473 /T 71.7/ 99.8664 2021-Jul-25 00:00 275.79579 44.47675 0.04486323367947 19.489 n.a. 110.7025 /T 76.0/ 98.7897 2021-Jul-26 00:00 274.71508 45.55560 0.04273878746662 19.428 n.a. 109.2415 /T 81.1/ 95.2545 2021-Jul-27 00:00 273.48236 46.72201 0.04063092893874 19.368 n.a. 107.6477 /T 86.4/ 89.6468 2021-Jul-28 00:00 272.06117 47.98738 0.03854307843809 19.309 n.a. 105.9014 /T 91.6/ 82.4221 2021-Jul-29 00:00 270.40328 49.36399 0.03647950149777 19.252 n.a. 103.9792 /T 96.2/ 74.0388 2021-Jul-30 00:00 268.44395 50.86434 0.03444552139049 19.198 n.a. 101.8529 /T 99.9/ 64.9170 2021-Jul-31 00:00 266.09456 52.49999 0.03244780196624 19.150 n.a. 99.4887 /T 102.4/ 55.4231 2021-Aug-01 00:00 263.23184 54.27894 0.03049471766997 19.109 n.a. 96.8462 /T 103.4/ 45.8736 2021-Aug-02 00:00 259.68174 56.20074 0.02859682898311 19.080 n.a. 93.8775 /T 102.6/ 36.5502 2021-Aug-03 00:00 255.19659 58.24708 0.02676747855585 19.067 n.a. 90.5264 /T 99.9/ 27.7179 2021-Aug-04 00:00 249.42728 60.36472 0.02502350906382 19.077 n.a. 86.7289 /T 95.4/ 19.6411 2021-Aug-05 00:00 241.90529 62.43571 0.02338606572131 19.121 n.a. 82.4152 /T 89.1/ 12.5950 2021-Aug-06 00:00 232.09170 64.23240 0.02188136439863 19.212 n.a. 77.5158 /T 81.2/ 6.8670 2021-Aug-07 00:00 219.63024 65.37271 0.02054115722149 19.370 n.a. 71.9722 /T 72.1/ 2.7479 2021-Aug-08 00:00 204.91420 65.34278 0.01940240864405 19.623 n.a. 65.7570 /T 62.5/ 0.5108 2021-Aug-09 00:00 189.51054 63.68575 0.01850548572474 20. n.a. 58.9007 /T 53.7/ 0.3800 2021-Aug-10 00:00 175.44820 60.28040 0.01789021344735 21. n.a. 51.5225 /T 47.5/ 2.4962 2021-Aug-11 00:00 163.90447 55.41379 0.01758982873071 21. n.a. 43.8513 /T 46.7/ 6.8840 2021-Aug-12 00:00 154.94363 49.59955 0.01762427741409 22. n.a. 36.2233 /T 52.4/ 13.4305 2021-Aug-13 00:00 148.09986 43.37419 0.01799558282290 24. n.a. 29.0588 /T 63.1/ 21.8806 2021-Aug-14 00:00 142.84483 37.18184 0.01868765535528 25. n.a. 22.8435 /L 76.8/ 31.8473 2021-Aug-15 00:00 138.75154 31.33013 0.01967060783454 27. n.a. 18.1422 /L 91.8/ 42.8345 2021-Aug-16 00:00 135.50957 25.99201 0.02090729207808 28. n.a. 15.5424 /L 107.3/ 54.2660 2021-Aug-17 00:00 132.90033 21.23422 0.02235932559059 28. n.a. 15.2466 /L 122.8/ 65.5197 2021-Aug-18 00:00 130.77023 17.05358 0.02399110677943 28. n.a. 16.6793 /L 137.7/ 75.9665 2021-Aug-19 00:00 129.01017 13.40842 0.02577172599198 27. n.a. 18.9764 /L 151.7/ 85.0162 2021-Aug-20 00:00 127.54142 10.24051 0.02767538707094 26. n.a. 21.5508 /L 162.6/ 92.1689

Setups


We know nothing about the rotation period of 2012 BA35, so we will start with a
standard CW setup with a resolution of 1 Hz.

CW setup:
---------------------------------------------------------------------------
TX polarization           RCP
RCV polarization          LCP & RCP
Frequency hops:           no hopping
Bandwidth:               5000 Hz 
TXoffset                 +500 Hz
FFT                      5000 for 1.0 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            255
ncoh              8
bandwidth       490 Hz   
FFT             128
resolution        3.8 Hz
TXoffset        +50 Hz  (echo in column 77)
---------------------------------------------------------------------

Instructions

NOTE: Data should be moved to the appropriate subdirectories in aardvark:/export/data0/2012ba35/raw/

POINTING:

  OSOD and predicts are on aardvark:



POINTING  

...Not yet available...

Transmit offsets are given in millidegrees.  


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

2012 BA35 GOLDSTONE MASTERLOG

============================================================================== ----------------------------------------------------- ...Not yet available... -----------------------------------------------------
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/2012BA35/2012BA35.2021.goldstone.planning.html

Asteroid Radar Astronomy
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