Goldstone Radar Observations Planning: (5189) 1990 UQ, 2008 GO20, and 2018 LM4


Background


(285571) 2000 PQ9    
2000 PQ9 was discovered in August, 2000 by LINEAR.  Its absolute magnitude of 18.1 suggests
a diameter of roughly 800 meters but otherwise its physical properties are unknown.  

2000 PQ9 will approach within 0.067 au on 2021 July 21.  We expect moderately strong SNRs
suitable for CW observations, ranging, and perhaps coarse-resolution imaging.
Time at Goldstone is scheduled on July 23 and 24.

2000 PQ9 will well-positioned for optical observations in June, July, and August, when it
will reach 13th magnitude at favorable solar elongations.  The rotation period is unknown, 
so photometric observations would be very welcome. 


2008 GO20
2008 GO20 will approach within 0.028 au (10.9 lunar distances) on 2021 July 26.
Nothing is known about its physical properties other than its absolute magnitude of
22.3, which suggests a diameter of about 100 meters.  


The nominal close approach is at 0.028 au, but the 3-sigma limits indicate that the approach
could be within 0.018 au or as distant as 0.038 au.  As such, depending on the close approach
distance, it could be a radar target strong enough for imaging or, conversely, too distant to detect.

As of 2021 May 25, the pointing and orbital uncertainties are large for this object so any astrometry
would be greatly appreciated!   

2008 GO20 will linger near 22nd magnitude until mid-July when it gets too close to the Sun for
optical astrometry.   The best time to obtain astrometry is in the first 2 1/2 weeks of June, 
when the solar elongations exceed 75 degrees, the Moon is between last quarter and first quarter,
when the 3-sigma pointing uncertainties are somewhat manageable (2300 - 5000 arcseconds), 
and the visual magnitude is about 21.9 (which may be as bright as this object gets before the flyby).


2018 LM4
2018 LM4 was discovered on June 11, 2018 by the Mt. Lemmon Survey.  This object has
an absolute magnitude of 18.8, suggesting a diameter within a factor of two of 550 meters,
and a slow rotation period of 40.6 hours (Warner et al. 2021). The lightcurves reveal an
amplitude of 0.2 magnitudes and suggest that the shape has a low elongation.  

2018 LM4 will make a relatively distant flyby within about 0.082 au on August 6, and the
view periods overlap time previously scheduled for 2008 GO20 on three days while the asteroid
is inbound, but not on the dates when the SNRs will be strongest.  2018 LM4 SNRs
should be strong enough for CW observations and ranging but probably not for delay-Doppler
imaging.  

This asteroid will reach 14th magnitude in early August while at solar elongations exceeding
160 degrees for a few days, providing an excellent opportunity for phometry, vis-IR spectroscopy, and 
possibly infrared radiometry.  



Orbital and Physical Characteristics  
Name                     2000 PQ9       2008 GO20           2018 LM4
Asteroid number          285571         not numbered        not numbered       
Discoverer               LINEAR         Mt. Lemmon Survey   Mt. Lemmon Survey
Discovery date           2000 Aug  9    2008 Apr  9         2018 Jun 11
Orbit type               Amor           Apollo              Apollo
Close approach distance  0.0672 au      0.028 au            0.0818 au
Close approach distance  26.1 LD        10.9 LD             31.8 LD
Close approach date      2021 Jul 21    2021 Jul 26         2021 Aug  6

semimajor axis           1.904 au       1.892 au            1.109 au
eccentricity             0.432          0.491               0.201
inclination              13.5 deg       2.2 deg             32.2 deg
Orbital period           2.63 years     2.60 y              1.028 y
perihelion distance      1.081 au       0.963 au            0.814 au
aphelion distance        2.727 au       2.821 au            1.224 au
MOID                     0.066 au       0.0085 au           0.080 au

absolute magnitude (H)   18.1           22.3                18.8
diameter                ~0.8 km        ~0.11 km            ~0.55 km  Warner et al. 2021
optical albedo           unknown        unknown             unknown
rotation period          unknown        unknown             40.6 h
lightcurve amplitude     unknown        unknown             0.17     Warner et al. 2021
spectral class           unknown        unknown             unknown
PHA?                     No             No                  No

Last update: 2021 June 16


Discovery M.P.E.C.


2000 PQ9
https://www.minorplanetcenter.net/mpec/K00/K00P50.html

2008 GO20
https://www.minorplanetcenter.net/mpec/K08/K08G66.html

2018 LM4
https://www.minorplanetcenter.net/mpec/K18/K18L75.html


SNR Calculations

Goldstone SNRs
2000 PQ9
2000 PQ9:  D = 0.76 km,  P = 2.2 h,  OC albedo = 0.1

w  DOY   start date    window      RA, dec   dist  runs  SNR/day SNR/run
28 198  2021 Jul 17  06:30-08:53  293, -33  0.071    60     25      3
28 199  2021 Jul 18  05:44-09:42  294, -29  0.070   102     37      4
29 200  2021 Jul 19  05:13-10:16  296, -25  0.069   132     48      4
29 201  2021 Jul 20  04:48-10:43  297, -21  0.068   157     57      5 
29 202  2021 Jul 21  04:28-11:05  298, -16  0.067   177     65      5 
29 203  2021 Jul 22  04:10-11:25  299, -12  0.067   194     70      6 
29 204  2021 Jul 23  03:54-11:42  301,  -8  0.068   207     73      6  Scheduled
29 205  2021 Jul 24  03:40-11:57  302,  -4  0.069   218     73      5  Scheduled
29 206  2021 Jul 25  03:27-12:10  303,   0  0.070   225     70      5 
30 207  2021 Jul 26  03:15-12:21  304,  +4  0.071   230     66      5 
30 208  2021 Jul 27  03:05-12:32  305,  +8  0.073   232     61      4
30 209  2021 Jul 28  02:55-12:41  306, +11  0.076   232     55      4
30 210  2021 Jul 29  02:46-12:49  307, +14  0.078   231     49      3
30 211  2021 Jul 30  02:38-12:56  307, +17  0.081   229     43      3
30 212  2021 Jul 31  02:30-13:02  308, +20  0.084   225     37      3
30 213  2021 Aug 01  02:23-13:08  309, +22  0.087   221     32      2
31 214  2021 Aug 02  02:16-13:13  310, +25  0.091   217     27      2


2008 GO20 2008 GO20: D = 0.11 km, P = 0.5 h, OC albedo = 0.1 w DOY start date window RA, dec dist runs SNR/day SNR/run 29 203-204 2021 Jul 22-23 15:32-01:40 133, +18 0.035 537 33 2 29 204-205 2021 Jul 23-24 15:02-01:08 126, +18 0.032 588 48 2 29 205-206 2021 Jul 24-25 14:27-00:31 118, +18 0.029 636 65 3 Scheduled 1600-2100 29 206 2021 Jul 25 13:49-23:48 109, +17 0.027 675 84 3 Scheduled 1450-1620 30 207 2021 Jul 26 13:08-23:01 99, +16 0.026 697 99 4 30 208 2021 Jul 27 12:26-22:11 89, +14 0.026 695 100 4 Scheduled 1225-1720 30 209 2021 Jul 28 11:47-21:22 78, +12 0.027 668 94 4 30 210 2021 Jul 29 11:11-20:36 69, +10 0.028 624 76 3 30 211 2021 Jul 30 10:39-19:55 61, +8 0.030 570 57 3 Scheduled 1220-1430; Overlaps 2018 LM4 30 212 2021 Jul 31 10:13-19:19 54, +6 0.033 515 41 2 30 213 2021 Aug 01 09:50-18:48 48, +4 0.036 463 28 1
2018 LM4 2018 LM4: D = 0.55 km, P = 40.6 h, OC albedo = 0.1 start date window RA, dec dist runs SNR/day SNR/run 2021 Jul 27 03:25-13:31 316, +15 0.126 145 17 2 Overlaps 2008 GO20 2021 Jul 28 03:26-13:17 315, +12 0.119 150 21 2 Overlaps 2008 GO20 2021 Jul 29 03:28-13:01 314, +9 0.112 154 27 2 2021 Jul 30 03:31-12:43 314, +6 0.105 158 33 3 Overlaps 2008 GO20 2021 Jul 31 03:36-12:24 313, +2 0.100 160 40 3 2021 Aug 1 03:42-12:01 312, -3 0.094 159 48 4 2021 Aug 2 03:52-11:35 311, -8 0.090 155 54 5 2021 Aug 3 04:05-11:03 310, -14 0.086 146 59 5 2021 Aug 4 04:24-10:25 308, -20 0.084 130 58 6 2021 Aug 5 04:53-09:35 307, -26 0.082 103 51 5 2021 Aug 6 05:49-08:16 305, -32 0.082 54 34 5 After August 6, this object moves too far south for Goldstone to track.

Track Assignments


DOY    BOA   BOT   EOT   EOA
204    0345  0515  0645  0715  GSSR Ast 2000 PQ9
205    0210  0340  0625  0655  GSSR Ast 2000 PQ9
205    1430  1600  2100  2130  GSSR Ast 2008 GO20
206    1310  1450  1620  1650  GSSR Ast 2008 GO20
208    1055  1225  1720  1750  GSSR Ast 2008 GO20 & 2018 LM4
209    1050  1220  1430  1450  GSSR Ast 2008 GO20 & 2018 LM4
211    0925  1055  1535  1605  GSSR Ast 2008 GO20 & 2018 LM4

Goldstone tracks:
        UT                   UT         PDT                 Duration Round-trip     
DOY     Date                 TX Window  TX Window           hh:mm    time (sec)   SNR/run  Observer
204     Jul 23    2000 PQ9   0515-0645  2215-2345 Jul 22     1:30        68          6

205     Jul 24    2000 PQ9   0340-0625  2040-2325 Jul 23     2:45        69          5       

205     Jul 24    2008 GO20  1600-2100  0900-1400 Jul 24     5:00        29          3

206     Jul 25    2008 GO20  1450-1620  0750-0920 Jul 25     1:30        27          3 

208     Jul 27    2008 GO20  1225-1720  0525-1020 Jul 27     4:55        26          4
208     Jul 27    2018 LM4   1225-1330  0525-0630 Jul 27     1:05       126          2    Try to start early

209     Jul 28    2008 GO20  1220-1430  0520-0730 Jul 28     2:10        27          3 
209     Jul 28    2018 LM4   1220-1315  0520-0615 Jul 28     0:55       119          2    Try to start early

211     Jul 30    2008 GO20  1055-1535  0355-0835 Jul 30     4:40        30          3    
211     Jul 30    2018 LM4   1055-1240  0355-0540 Jul 30     1:45       105          3    Try to start early 



Uncertainties

2000 PQ9
JPL/Horizons solution 30, # obs: 211 (2000-2021)
2021 June 16
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.            delta POS_3sigma  DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2021-Jul-19 00:00 *m  295.30516 -26.00836 0.06892086220635      2.963        1.16        4.21       0.000634
 2021-Jul-20 00:00 *m  296.59629 -21.91911 0.06793946720743      3.068        1.22        4.43       0.000623
 2021-Jul-21 00:00 *m  297.84591 -17.72498 0.06737606104073      3.156        1.27        4.60       0.000611
 2021-Jul-22 00:00 *   299.05341 -13.48128 0.06723978084296      3.225        1.29        4.70       0.000600
 2021-Jul-23 00:00 *   300.21848  -9.24652 0.06753177861579      3.272        1.30        4.74       0.000588 *
 2021-Jul-24 00:00 *   301.34107  -5.07810 0.06824507004222      3.296        1.29        4.70       0.000577 *
 2021-Jul-25 00:00 *   302.42139  -1.02819 0.06936512257635      3.298        1.26        4.59       0.000567
 2021-Jul-26 00:00 *   303.45991   2.85947 0.07087106358089      3.280        1.22        4.42       0.000558
 2021-Jul-27 00:00 *   304.45733   6.55144 0.07273728077059      3.244        1.16        4.21       0.000551

JPL/Horizons solution 27, # obs: 191 (2000-2021)
2021 May 20
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.            delta POS_3sigma  DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2021-Jul-19 00:00 *m  295.30560 -26.00783 0.06892087716734     20.956        6.27       22.80       0.001584
 2021-Jul-20 00:00 *m  296.59672 -21.91857 0.06793953042475     21.437        6.71       24.38       0.001396
 2021-Jul-21 00:00 *m  297.84632 -17.72445 0.06737617275101     21.778        7.04       25.59       0.001209
 2021-Jul-22 00:00 *   299.05382 -13.48076 0.06723994030752     21.960        7.24       26.33       0.001036
 2021-Jul-23 00:00 *   300.21887  -9.24601 0.06753198412729     21.975        7.31       26.56       0.000894 *
 2021-Jul-24 00:00 *   301.34145  -5.07761 0.06824531902064     21.826        7.23       26.27       0.000806 *
 2021-Jul-25 00:00 *   302.42175  -1.02773 0.06936541173866     21.526        7.02       25.53       0.000789
 2021-Jul-26 00:00 *   303.46026   2.85991 0.07087138915501     21.096        6.71       24.40       0.000841
 2021-Jul-27 00:00 *   304.45767   6.55184 0.07273763871939     20.561        6.32       22.99       0.000941


2008 GO20 JPL/Horizons solution 20, # obs: 62 (204 days) 2021 Jun 16 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2021-Jun-16 00:00 *m 168.31348 14.40101 0.18420624191863 1996.297 123.19 447.73 8.612255 2021-Jun-17 00:00 *m 168.25103 14.41001 0.18011349197141 2165.438 213.28 775.15 8.607438 2021-Jun-18 00:00 *m 168.17949 14.42177 0.17596920794718 2348.661 307.94 1119.18 8.599451 2021-Jun-19 00:00 *m 168.09719 14.43683 0.17177522009543 2546.843 407.68 1481.69 8.588131 2021-Jun-20 00:00 *m 168.00232 14.45578 0.16753360558315 2761.057 513.08 1864.77 8.573297 2021-Jun-21 00:00 *m 167.89293 14.47923 0.16324669855257 2992.584 624.80 2270.80 8.554747 2021-Jun-22 00:00 *m 167.76688 14.50783 0.15891709220097 3242.927 743.55 2702.41 8.532255 2021-Jun-23 00:00 * 167.62187 14.54226 0.15454762763556 3513.834 870.16 3162.56 8.505571 2021-Jun-24 00:00 * 167.45540 14.58327 0.15014136637098 3807.322 1005.54 3654.59 8.474412 2021-Jun-25 00:00 * 167.26473 14.63161 0.14570154873998 4125.709 1150.73 4182.28 8.438464 2021-Jun-26 00:00 * 167.04690 14.68809 0.14123154715899 4471.660 1306.95 4750.03 8.397374 2021-Jun-27 00:00 * 166.79865 14.75357 0.13673482699255 4848.242 1475.60 5363.01 8.350745 2021-Jun-28 00:00 * 166.51635 14.82897 0.13221492577536 5258.991 1658.40 6027.37 8.298124 2021-Jun-29 00:00 * 166.19595 14.91530 0.12767545507533 5707.998 1857.35 6750.47 8.238996 2021-Jun-30 00:00 * 165.83288 15.01364 0.12312012269165 6200.015 2074.92 7541.22 8.172770 2021-Jul-01 00:00 * 165.42191 15.12520 0.11855276966523 6740.573 2314.07 8410.37 8.098757 2021-Jul-02 00:00 * 164.95706 15.25134 0.11397741713155 7336.138 2578.38 9370.99 8.016159 2021-Jul-03 00:00 * 164.43140 15.39354 0.10939832071383 7994.291 2872.23 10439.00 7.924037 2021-Jul-04 00:00 * 163.83688 15.55345 0.10482003320821 8723.949 3201.01 11633.91 7.821282 2021-Jul-05 00:00 * 163.16410 15.73293 0.10024747893294 9535.630 3571.31 12979.77 7.706576 2021-Jul-06 00:00 * 162.40200 15.93403 0.09568604524882 10441.780 3991.34 14506.35 7.578339 2021-Jul-07 00:00 *m 161.53747 16.15900 0.09114169871065 11457.150 4471.30 16250.74 7.434669 2021-Jul-08 00:00 *m 160.55491 16.41033 0.08662113542944 12599.247 5023.96 18259.34 7.273257 2021-Jul-09 00:00 *m 159.43561 16.69069 0.08213197780504 13888.838 5665.34 20590.42 7.091285 2021-Jul-10 00:00 *m 158.15701 17.00293 0.07768303309379 15350.486 6415.64 23317.34 6.885286 2021-Jul-11 00:00 *m 156.69177 17.34991 0.07328463356917 17013.045 7300.25 26532.42 6.650981 2021-Jul-12 00:00 *m 155.00659 17.73436 0.06894908356920 18909.970 8351.01 30351.38 6.383058 2021-Jul-13 00:00 *m 153.06081 18.15845 0.06469124555037 21079.153 9607.46 34917.87 6.074912 2021-Jul-14 00:00 *m 150.80477 18.62315 0.06052930469668 23561.722 11117.69 40406.73 5.718335 2021-Jul-15 00:00 *m 148.17804 19.12718 0.05648575709332 26398.796 12938.10 47022.93 5.303185 2021-Jul-16 00:00 *m 145.10783 19.66520 0.05258866325088 29624.487 15130.20 54990.03 4.817091 2021-Jul-17 00:00 *m 141.50832 20.22506 0.04887318197445 33252.361 17751.32 64516.34 4.245362 2021-Jul-18 00:00 *m 137.28227 20.78379 0.04538331990608 37251.591 20833.69 75719.09 3.571387 2021-Jul-19 00:00 *m 132.32760 21.30221 0.04217364960798 41509.047 24344.80 88480.06 2.778084 2021-Jul-20 00:00 *m 126.55272 21.71929 0.03931039937345 45777.946 28123.74 102214.44 1.851219 2021-Jul-21 00:00 *m 119.90470 21.94904 0.03687077638153 49627.700 31803.88 115589.73 0.785378 2021-Jul-22 00:00 * 112.41038 21.88620 0.03493882890860 52436.680 34770.04 126370.09 0.407489 2021-Jul-23 00:00 * 104.21850 21.42765 0.03359621885050 53494.000 36245.14 131731.27 1.689710 2021-Jul-24 00:00 * 95.61510 20.50967 0.03290801357578 52245.668 35578.58 129308.71 2.995982 2021-Jul-25 00:00 * 86.98300 19.14448 0.03290730117247 48590.811 32628.51 118586.83 4.244293 2021-Jul-26 00:00 * 78.70962 17.42822 0.03358564181386 43004.741 27924.50 101490.30 5.358197 2021-Jul-27 00:00 * 71.09214 15.50944 0.03489487168438 36353.018 22415.61 81468.49 6.288228 2021-Jul-28 00:00 * 64.29168 13.53914 0.03675929722707 29534.126 17014.04 61836.74 7.019741 2021-Jul-29 00:00 * 58.34475 11.63386 0.03909171070729 23209.548 12295.97 44689.15 7.566058 2021-Jul-30 00:00 * 53.20427 9.86427 0.04180666933418 17733.845 8474.76 30801.12 7.955386 2021-Jul-31 00:00 * 48.78143 8.26193 0.04482829063021 13223.516 5523.25 20073.99 8.219599 JPL/Horizons solution 19, # obs: 50 (124 days) 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-16 00:00 168.66898 13.82207 0.19566885638162 4346.664 68.49 248.91 21.892175 2021-Jun-17 00:00 168.66577 13.80002 0.19157299658179 4705.696 117.30 426.33 21.891309 2021-Jun-18 00:00 168.65708 13.77907 0.18742170906514 5094.032 310.81 1129.64 21.883561 2021-Jun-19 00:00 168.64161 13.75961 0.18321664146604 5513.122 512.84 1863.91 21.868634 2021-Jun-20 00:00 168.61799 13.74207 0.17895966840788 5964.809 724.27 2632.32 21.846205 2021-Jun-21 00:00 168.58472 13.72688 0.17465289922261 6451.341 946.05 3438.37 21.815915 2021-Jun-22 00:00 168.54020 13.71450 0.17029867753155 6975.385 1179.25 4285.92 21.777369 2021-Jun-23 00:00 168.48273 13.70540 0.16589956740483 7540.065 1425.02 5179.19 21.730132 2021-Jun-24 00:00 168.41047 13.70009 0.16145832281323 8148.989 1684.65 6122.79 21.673725 2021-Jun-25 00:00 168.32146 13.69907 0.15697784233130 8806.306 1959.55 7121.89 21.607618 2021-Jun-26 00:00 168.21360 13.70285 0.15246111759532 9516.775 2251.34 8182.39 21.531230 2021-Jun-27 00:00 168.08462 13.71200 0.14791118779812 10285.856 2561.91 9311.16 21.443913 2021-Jun-28 00:00 167.93205 13.72707 0.14333111059123 11119.823 2893.52 10516.37 21.344945 2021-Jun-29 00:00 167.75313 13.74867 0.13872395337037 12025.910 3248.86 11807.82 21.233516 2021-Jun-30 00:00 167.54483 13.77747 0.13409280231810 13012.482 3631.16 13197.30 21.108707 2021-Jul-01 00:00 167.30371 13.81419 0.12944078321835 14089.253 4044.37 14699.07 20.969470 2021-Jul-02 00:00 167.02585 13.85963 0.12477108836072 15267.539 4493.22 16330.40 20.814598 2021-Jul-03 00:00 166.70681 13.91468 0.12008700619819 16560.582 4983.50 18112.31 20.642697 2021-Jul-04 00:00 166.34144 13.98032 0.11539195309245 17983.939 5522.28 20070.49 20.452138 2021-Jul-05 00:00 165.92380 14.05766 0.11068950862205 19555.974 6118.27 22236.58 20.241008 2021-Jul-06 00:00 165.44696 14.14794 0.10598345745503 21298.464 6782.26 24649.81 20.007041 2021-Jul-07 00:00 164.90279 14.25256 0.10127784193968 23237.368 7527.72 27359.14 19.747531 2021-Jul-08 00:00 164.28168 14.37308 0.09657703063625 25403.787 8371.60 30426.20 19.459227 2021-Jul-09 00:00 163.57218 14.51129 0.09188580922873 27835.162 9335.40 33929.10 19.138178 2021-Jul-10 00:00 162.76056 14.66916 0.08720950183806 30576.789 10446.59 37967.64 18.779554 2021-Jul-11 00:00 161.83021 14.84893 0.08255413297558 33683.697 11740.48 42670.23 18.377389 2021-Jul-12 00:00 160.76085 15.05307 0.07792664365941 37222.950 13262.87 48203.28 17.924255 2021-Jul-13 00:00 159.52760 15.28425 0.07333518020628 41276.424 15073.45 54783.76 17.410820 2021-Jul-14 00:00 158.09963 15.54530 0.06878948175463 45943.968 17250.47 62696.04 16.825264 2021-Jul-15 00:00 156.43849 15.83900 0.06430140368587 51346.706 19896.75 72313.82 16.152503 2021-Jul-16 00:00 154.49594 16.16774 0.05988562977441 57629.704 23147.26 84127.66 15.373159 2021-Jul-17 00:00 152.21117 16.53285 0.05556064669160 64962.243 27177.77 98776.36 14.462242 2021-Jul-18 00:00 149.50749 16.93345 0.05135007934178 73531.860 32212.49 117074.79 13.387517 2021-Jul-19 00:00 146.28863 17.36425 0.04728450825802 83524.355 38524.92 140017.04 12.107699 2021-Jul-20 00:00 142.43559 17.81204 0.04340389085999 95074.939 46417.78 168703.29 10.570929 2021-Jul-21 00:00 137.80626 18.24988 0.03976063297671 108165.107 56151.61 204080.42 8.714789 2021-Jul-22 00:00 132.24264 18.62865 0.03642308198874 122430.493 67767.84 246299.08 6.470618 2021-Jul-23 00:00 125.59453 18.86727 0.03347850859423 136858.728 80740.22 293446.60 3.777210 2021-Jul-24 00:00 117.77118 18.84720 0.03103325250977 149450.740 93467.71 339704.09 0.610385 2021-Jul-25 00:00 108.82412 18.42506 0.02920586773089 157160.758 102939.38 374128.42 2.970394 2021-Jul-26 00:00 99.03127 17.47904 0.02810881109503 156680.655 105383.49 383011.44 6.778221 2021-Jul-27 00:00 88.90550 15.98170 0.02781956166153 146244.177 98420.58 357705.06 10.506466 2021-Jul-28 00:00 79.06602 14.04456 0.02835358034220 127213.873 83234.18 302510.79 13.823143 2021-Jul-29 00:00 70.03303 11.87997 0.02965743895548 103611.987 64089.46 232930.18 16.501653 2021-Jul-30 00:00 62.09423 9.70654 0.03162773169610 79864.815 45483.44 165307.47 18.483634 2021-Jul-31 00:00 55.30888 7.67766 0.03414180797975 58970.560 30018.92 109102.39 19.842717 We need help with astrometry!
2018 LM4 JPL/Horizons solution 59, # obs: 255 (2018-2021) 2021 May 20 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2021-Jul-25 00:00 * 316.81169 20.77246 0.14407620672183 0.884 0.46 1.66 0.000406 2021-Jul-26 00:00 * 316.32627 18.64009 0.13617477927337 0.933 0.48 1.74 0.000395 2021-Jul-27 00:00 * 315.78999 16.22801 0.12852499726659 0.988 0.51 1.84 0.000383 2021-Jul-28 00:00 * 315.19688 13.49578 0.12117607790063 1.047 0.54 1.96 0.000371 2021-Jul-29 00:00 * 314.53997 10.39931 0.11418721493428 1.111 0.58 2.11 0.000359 2021-Jul-30 00:00 * 313.81108 6.89280 0.10762909835129 1.180 0.63 2.29 0.000346 2021-Jul-31 00:00 * 313.00056 2.93251 0.10158504091250 1.253 0.69 2.50 0.000332 2021-Aug-01 00:00 * 312.09694 -1.51692 0.09615110505313 1.327 0.75 2.74 0.000318 2021-Aug-02 00:00 * 311.08647 -6.47310 0.09143432067204 1.400 0.82 2.99 0.000302 2021-Aug-03 00:00 * 309.95262 -11.92398 0.08754788929290 1.468 0.89 3.24 0.000286 2021-Aug-04 00:00 * 308.67530 -17.81571 0.08460249328329 1.526 0.95 3.46 0.000270 2021-Aug-05 00:00 *m 307.22997 -24.04484 0.08269385017960 1.567 0.99 3.62 0.000254 2021-Aug-06 00:00 *m 305.58645 -30.46074 0.08188853380524 1.587 1.01 3.67 0.000240 2021-Aug-07 00:00 *m 303.70741 -36.88148 0.08221202771112 1.583 1.00 3.62 0.000228
Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination: 2000 PQ9 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2021-Jun-17 00:00 251.88052 -69.69808 0.20126254512538 16.521 n.a. 132.9555 /T 100.3/ 37.6073 2021-Jun-19 00:00 253.49977 -69.51580 0.19084212622538 16.397 n.a. 133.1233 /T 81.8/ 59.4246 2021-Jun-21 00:00 255.34417 -69.21478 0.18054892774739 16.265 n.a. 133.3988 /T 63.2/ 80.4175 2021-Jun-23 00:00 257.42016 -68.77428 0.17038628432156 16.125 n.a. 133.8045 /T 48.3/ 95.3794 2021-Jun-25 00:00 259.72623 -68.16803 0.16036233467805 15.976 n.a. 134.3669 /T 43.9/ 99.8874 2021-Jun-27 00:00 262.25222 -67.36288 0.15049166148040 15.817 n.a. 135.1187 /T 53.0/ 93.0860 2021-Jun-29 00:00 264.97949 -66.31730 0.14079669416523 15.645 n.a. 136.0997 /T 69.1/ 77.9701 2021-Jul-01 00:00 267.88135 -64.97988 0.13130897955233 15.459 n.a. 137.3588 /T 87.1/ 58.8627 2021-Jul-03 00:00 270.92347 -63.28760 0.12207101632369 15.258 n.a. 138.9557 /T 105.1/ 39.3365 2021-Jul-05 00:00 274.06513 -61.16393 0.11313917114450 15.040 n.a. 140.9634 /T 122.5/ 21.9149 2021-Jul-07 00:00 277.26142 -58.51732 0.10458778670816 14.803 n.a. 143.4695 /T 138.6/ 8.5768 2021-Jul-09 00:00 280.46627 -55.24123 0.09651436601973 14.546 n.a. 146.5763 /T 150.1/ 1.1144 2021-Jul-11 00:00 283.63563 -51.21819 0.08904539035583 14.267 n.a. 150.3967 /T 149.0/ 1.0225 2021-Jul-13 00:00 286.73019 -46.33169 0.08234147291878 13.966 n.a. 155.0410 /T 134.8/ 9.0127 2021-Jul-15 00:00 289.71731 -40.49180 0.07659880955442 13.644 n.a. 160.5874 /T 114.2/ 24.4990 2021-Jul-17 00:00 292.57180 -33.67831 0.07204138310292 13.298 n.a. 167.0207 /T 90.7/ 45.3390 2021-Jul-19 00:00 295.27574 -25.99517 0.06889697916635 12.919 n.a. 174.0172 /T 65.6/ 67.8341 2021-Jul-21 00:00 297.81763 -17.70879 0.06735441267325 12.756 n.a. 176.1996 /T 40.3/ 87.0794 2021-Jul-23 00:00 300.19134 -9.22786 0.06751295244627 13.081 n.a. 168.9181 /T 20.5/ 98.2474 2021-Jul-25 00:00 302.39535 -1.00799 0.06934949829605 13.397 n.a. 161.2405 /T 25.1/ 98.7897 2021-Jul-27 00:00 304.43234 6.57216 0.07272497222812 13.707 n.a. 154.1391 /T 44.3/ 89.6468 2021-Jul-29 00:00 306.30870 13.28794 0.07742555594478 14.013 n.a. 147.8966 /T 63.4/ 74.0388 2021-Jul-31 00:00 308.03354 19.06986 0.08321337871333 14.307 n.a. 142.5953 /T 80.3/ 55.4231 2021-Aug-02 00:00 309.61769 23.95709 0.08986439440015 14.586 n.a. 138.1990 /T 94.9/ 36.5502 2021-Aug-04 00:00 311.07284 28.04455 0.09718713095472 14.845 n.a. 134.6128 /T 107.3/ 19.6411 2021-Aug-06 00:00 312.41100 31.44461 0.10502700197359 15.085 n.a. 131.7228 /T 117.2/ 6.8670 2021-Aug-08 00:00 313.64414 34.26598 0.11326308498526 15.305 n.a. 129.4186 /T 123.4/ 0.5108 2021-Aug-10 00:00 314.78394 36.60469 0.12180225421075 15.506 n.a. 127.6022 /T 124.3/ 2.4962 2021-Aug-12 00:00 315.84153 38.54180 0.13057318140576 15.690 n.a. 126.1903 /T 119.1/ 13.4305 2021-Aug-14 00:00 316.82712 40.14421 0.13952121970294 15.859 n.a. 125.1142 /T 109.1/ 31.8473 2021-Aug-16 00:00 317.74968 41.46637 0.14860444095186 16.015 n.a. 124.3170 /T 96.4/ 54.2660 2021-Aug-18 00:00 318.61680 42.55231 0.15779075746231 16.158 n.a. 123.7528 /T 83.1/ 75.9665 2021-Aug-20 00:00 319.43480 43.43738 0.16705593481056 16.290 n.a. 123.3838 /T 71.2/ 92.1689 2021-Aug-22 00:00 320.20910 44.14984 0.17638227289320 16.413 n.a. 123.1795 /T 63.0/ 99.5134 2021-Aug-24 00:00 320.94473 44.71227 0.18575769177049 16.528 n.a. 123.1148 /T 60.4/ 97.2183 2021-Aug-26 00:00 321.64665 45.14285 0.19517495886563 16.635 n.a. 123.1693 /T 63.6/ 86.9052 Excellent target for photometry: 13th magnitude, visible in small telescopes, and an unusually long apparition.
2008 GO20 JPL/Horizons solution 19 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2021-Jun-01 00:00 168.71028 14.06797 0.24990753371800 21.967 n.a. 93.3314 /T 160.7/ 63.6295 2021-Jun-02 00:00 168.68233 14.06569 0.24671765078440 21.965 n.a. 92.3598 /T 173.2/ 53.2997 2021-Jun-03 00:00 168.66049 14.06043 0.24346824832088 21.963 n.a. 91.3949 /T 172.6/ 43.1426 2021-Jun-04 00:00 168.64427 14.05238 0.24015864830189 21.960 n.a. 90.4362 /T 160.8/ 33.5122 2021-Jun-05 00:00 168.63319 14.04175 0.23678828065249 21.958 n.a. 89.4833 /T 148.8/ 24.6947 2021-Jun-06 00:00 168.62670 14.02875 0.23335669249575 21.955 n.a. 88.5355 /T 136.9/ 16.9298 2021-Jun-07 00:00 168.62424 14.01360 0.22986355487313 21.952 n.a. 87.5923 /T 125.1/ 10.4256 2021-Jun-08 00:00 168.62520 13.99653 0.22630866768919 21.949 n.a. 86.6530 /T 113.3/ 5.3658 2021-Jun-09 00:00 168.62894 13.97777 0.22269196386462 21.945 n.a. 85.7170 /T 101.5/ 1.9101 2021-Jun-10 00:00 168.63478 13.95759 0.21901351360111 21.942 n.a. 84.7835 /T 89.6/ 0.1884 2021-Jun-11 00:00 168.64198 13.93623 0.21527352940922 21.938 n.a. 83.8519 /T 77.7/ 0.2918 2021-Jun-12 00:00 168.64977 13.91398 0.21147237222198 21.934 n.a. 82.9213 /T 65.7/ 2.2643 2021-Jun-13 00:00 168.65730 13.89113 0.20761055861590 21.931 n.a. 81.9909 /T 53.5/ 6.0947 2021-Jun-14 00:00 168.66366 13.86797 0.20368876896878 21.927 n.a. 81.0598 /T 41.2/ 11.7121 2021-Jun-15 00:00 168.66790 13.84484 0.19970785636225 21.923 n.a. 80.1269 /T 28.7/ 18.9826 2021-Jun-16 00:00 168.66898 13.82207 0.19566885615954 21.919 n.a. 79.1912 /T 16.0/ 27.7056 2021-Jun-17 00:00 168.66577 13.80002 0.19157299635959 21.915 n.a. 78.2516 /T 3.972/ 37.6073 2021-Jun-18 00:00 168.65708 13.77907 0.18742170884296 21.911 n.a. 77.3069 /T 11.1/ 48.3309 2021-Jun-19 00:00 168.64161 13.75961 0.18321664124394 21.908 n.a. 76.3557 /T 24.6/ 59.4246 2021-Jun-20 00:00 168.61799 13.74207 0.17895966818589 21.904 n.a. 75.3966 /T 38.7/ 70.3347 2021-Jun-21 00:00 168.58472 13.72688 0.17465289900084 21.901 n.a. 74.4280 /T 53.1/ 80.4175 2021-Jun-22 00:00 168.54020 13.71450 0.17029867731010 21.898 n.a. 73.4484 /T 67.9/ 88.9833 2021-Jun-23 00:00 168.48273 13.70540 0.16589956718378 21.896 n.a. 72.4560 /T 82.9/ 95.3794 2021-Jun-24 00:00 168.41047 13.70009 0.16145832259263 21.894 n.a. 71.4489 /T 97.9/ 99.0999 2021-Jun-25 00:00 168.32146 13.69907 0.15697784211133 21.893 n.a. 70.4250 /T 113.0/ 99.8874 2021-Jun-26 00:00 168.21360 13.70285 0.15246111737604 21.893 n.a. 69.3824 /T 127.8/ 97.7802 2021-Jun-27 00:00 168.08462 13.71200 0.14791118757963 21.894 n.a. 68.3187 /T 142.2/ 93.0860 2021-Jun-28 00:00 167.93205 13.72707 0.14333111037371 21.896 n.a. 67.2314 /T 156.3/ 86.2946 2021-Jun-29 00:00 167.75313 13.74867 0.13872395315390 21.900 n.a. 66.1178 /T 169.8/ 77.9701 2021-Jun-30 00:00 167.54483 13.77747 0.13409280210287 21.906 n.a. 64.9748 /T 175.8/ 68.6638 2021-Jul-01 00:00 167.30371 13.81419 0.12944078300450 21.913 n.a. 63.7990 /T 163.5/ 58.8627 2021-Jul-02 00:00 167.02585 13.85963 0.12477108814839 21.923 n.a. 62.5866 /T 151.0/ 48.9747 2021-Jul-03 00:00 166.70681 13.91468 0.12008700598759 21.936 n.a. 61.3331 /T 138.6/ 39.3365 2021-Jul-04 00:00 166.34144 13.98032 0.11539195288377 21.952 n.a. 60.0336 /T 126.4/ 30.2324 2021-Jul-05 00:00 165.92380 14.05766 0.11068950841549 21.973 n.a. 58.6821 /T 114.1/ 21.9149 2021-Jul-06 00:00 165.44696 14.14794 0.10598345725085 21.998 n.a. 57.2720 /T 101.8/ 14.6201 2021-Jul-07 00:00 164.90279 14.25256 0.10127784173820 22.030 n.a. 55.7952 /T 89.5/ 8.5768 2021-Jul-08 00:00 164.28168 14.37308 0.09657703043775 22. n.a. 54.2425 /T 76.9/ 4.0062 2021-Jul-09 00:00 163.57218 14.51129 0.09188580903353 22. n.a. 52.6028 /T 64.1/ 1.1144 2021-Jul-10 00:00 162.76056 14.66916 0.08720950164659 22. n.a. 50.8630 /T 51.1/ 0.0774 2021-Jul-11 00:00 161.83021 14.84893 0.08255413278831 22. n.a. 49.0069 /T 37.7/ 1.0225 2021-Jul-12 00:00 160.76085 15.05307 0.07792664347688 22. n.a. 47.0154 /T 24.0/ 4.0090 2021-Jul-13 00:00 159.52760 15.28425 0.07333518002915 22. n.a. 44.8646 /T 10.0/ 9.0127 2021-Jul-14 00:00 158.09963 15.54530 0.06878948158368 23. n.a. 42.5256 /T 4.547/ 15.9153 2021-Jul-15 00:00 156.43849 15.83900 0.06430140352203 23. n.a. 39.9620 /T 19.4/ 24.4990 2021-Jul-16 00:00 154.49594 16.16774 0.05988562961881 23. n.a. 37.1289 /T 34.7/ 34.4459 2021-Jul-17 00:00 152.21117 16.53285 0.05556064654566 23. n.a. 33.9697 /T 50.7/ 45.3390 2021-Jul-18 00:00 149.50749 16.93345 0.05135007920725 24. n.a. 30.4138 /T 67.2/ 56.6667 2021-Jul-19 00:00 146.28863 17.36425 0.04728450813707 25. n.a. 26.3734 /T 84.5/ 67.8341 2021-Jul-20 00:00 142.43559 17.81204 0.04340389075536 26. n.a. 21.7406 /T 102.6/ 78.1905 2021-Jul-21 00:00 137.80626 18.24988 0.03976063289177 27. n.a. 16.3887 /T 121.5/ 87.0794 2021-Jul-22 00:00 132.24264 18.62865 0.03642308192758 31. n.a. 10.1827 /T 141.3/ 93.9113 2021-Jul-23 00:00 125.59453 18.86727 0.03347850856156 50. n.a. 3.0883 /T 161.7/ 98.2474 2021-Jul-24 00:00 117.77118 18.84720 0.03103325251054 39. n.a. 5.5618 /L 172.9/ 99.8664 2021-Jul-25 00:00 108.82412 18.42506 0.02920586776933 28. n.a. 14.9170 /L 152.5/ 98.7897 2021-Jul-26 00:00 99.03127 17.47904 0.02810881117339 24. n.a. 25.1996 /L 129.6/ 95.2545 2021-Jul-27 00:00 88.90550 15.98170 0.02781956177878 22. n.a. 35.9393 /L 106.5/ 89.6468 2021-Jul-28 00:00 79.06602 14.04456 0.02835358049385 20. n.a. 46.5692 /L 83.9/ 82.4221 2021-Jul-29 00:00 70.03303 11.87997 0.02965743913472 20. n.a. 56.5668 /L 62.4/ 74.0388 2021-Jul-30 00:00 62.09423 9.70654 0.03162773189555 19.145 n.a. 65.5959 /L 42.4/ 64.9170 2021-Jul-31 00:00 55.30888 7.67766 0.03414180819289 18.842 n.a. 73.5376 /L 24.2/ 55.4231 2021-Aug-01 00:00 49.59066 5.86764 0.03708274062668 18.674 n.a. 80.4320 /L 10.9/ 45.8736 This is going to be a difficult target for astrometry.
2018 LM4 JPL/Horizons solution 23 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2021-Jul-17 00:00 319.35023 31.23045 0.21262310657301 17.536 n.a. 123.2087 /L 117.6/ 45.3390 2021-Jul-18 00:00 319.13396 30.37412 0.20372825693902 17.414 n.a. 124.5883 /L 109.6/ 56.6667 2021-Jul-19 00:00 318.89299 29.42059 0.19489560585537 17.286 n.a. 126.0649 /L 100.3/ 67.8341 2021-Jul-20 00:00 318.62544 28.35728 0.18613748541478 17.151 n.a. 127.6510 /L 90.0/ 78.1905 2021-Jul-21 00:00 318.32916 27.16950 0.17746819121226 17.009 n.a. 129.3611 /L 79.3/ 87.0794 2021-Jul-22 00:00 318.00165 25.84011 0.16890445197381 16.859 n.a. 131.2125 /L 68.4/ 93.9113 2021-Jul-23 00:00 317.64002 24.34909 0.16046601737601 16.701 n.a. 133.2248 /L 58.0/ 98.2474 2021-Jul-24 00:00 317.24094 22.67307 0.15217638505394 16.534 n.a. 135.4213 /L 48.7/ 99.8664 2021-Jul-25 00:00 316.80053 20.78482 0.14406368798970 16.357 n.a. 137.8287 /L 41.8/ 98.7897 2021-Jul-26 00:00 316.31437 18.65287 0.13616176240887 16.169 n.a. 140.4780 /L 38.7/ 95.2545 2021-Jul-27 00:00 315.77727 16.24121 0.12851140943985 15.970 n.a. 143.4039 /L 40.3/ 89.6468 2021-Jul-28 00:00 315.18328 13.50937 0.12116184127197 15.759 n.a. 146.6449 /L 46.2/ 82.4221 2021-Jul-29 00:00 314.52540 10.41324 0.11417224894114 15.534 n.a. 150.2413 /L 55.0/ 74.0388 2021-Jul-30 00:00 313.79545 6.90701 0.10761332382011 15.296 n.a. 154.2320 /L 65.7/ 64.9170 2021-Jul-31 00:00 312.98377 2.94687 0.10156838667607 15.043 n.a. 158.6452 /L 77.6/ 55.4231 2021-Aug-01 00:00 312.07886 -1.50255 0.09613351760935 14.773 n.a. 163.4785 /L 90.4/ 45.8736 2021-Aug-02 00:00 311.06698 -6.45892 0.09141577679839 14.486 n.a. 168.6296 /T 103.9/ 36.5502 2021-Aug-03 00:00 309.93157 -11.91025 0.08752841017505 14.191 n.a. 173.5099 /T 118.1/ 27.7179 2021-Aug-04 00:00 308.65251 -17.80267 0.08458215668591 14.062 n.a. 174.5746 /T 132.8/ 19.6411 2021-Aug-05 00:00 307.20525 -24.03273 0.08267279537194 14.215 n.a. 169.6595 /T 147.6/ 12.5950 2021-Aug-06 00:00 305.55957 -30.44971 0.08186695418382 14.414 n.a. 163.1428 /T 161.3/ 6.8670 2021-Aug-07 00:00 303.67814 -36.87154 0.08219014984699 14.622 n.a. 156.3059 /T 167.0/ 2.7479 2021-Aug-08 00:00 301.51451 -43.11131 0.08362144776365 14.842 n.a. 149.5254 /T 157.3/ 0.5108 2021-Aug-09 00:00 299.01085 -49.00503 0.08609698575458 15.071 n.a. 143.0149 /T 142.9/ 0.3800 2021-Aug-10 00:00 296.09518 -54.43079 0.08952092623374 15.306 n.a. 136.9100 /T 128.0/ 2.4962 2021-Aug-11 00:00 292.67865 -59.31426 0.09377970151522 15.543 n.a. 131.2854 /T 113.4/ 6.8840 2021-Aug-12 00:00 288.65366 -63.62250 0.09875525603969 15.778 n.a. 126.1667 /T 99.5/ 13.4305 2021-Aug-13 00:00 283.89502 -67.35194 0.10433474177708 16.008 n.a. 121.5444 /T 86.6/ 21.8806 2021-Aug-14 00:00 278.26830 -70.51559 0.11041615429005 16.230 n.a. 117.3877 /T 75.1/ 31.8473 2021-Aug-15 00:00 271.65248 -73.13325 0.11691065465599 16.442 n.a. 113.6544 /T 65.4/ 42.8345 2021-Aug-16 00:00 263.98441 -75.22626 0.12374270471017 16.644 n.a. 110.2987 /T 58.2/ 54.2660 2021-Aug-17 00:00 255.32516 -76.81777 0.13084900744485 16.836 n.a. 107.2759 /T 54.2/ 65.5197 2021-Aug-18 00:00 245.92264 -77.93791 0.13817694117322 17.017 n.a. 104.5440 /T 53.7/ 75.9665 2021-Aug-19 00:00 236.21460 -78.63089 0.14568289452364 17.189 n.a. 102.0659 /T 56.6/ 85.0162 2021-Aug-20 00:00 226.72973 -78.95814 0.15333070921639 17.350 n.a. 99.8086 /T 62.0/ 92.1689 2021-Aug-21 00:00 217.92863 -78.99339 0.16109031575905 17.502 n.a. 97.7436 /T 69.0/ 97.0637

Setups




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/a285571/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

2000 PQ9 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/2000PQ9/2000PQ9.2021.goldstone.planning.html

Asteroid Radar Astronomy
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