Goldstone Radar Observations Planning: (450263) 2003 WD158 and (441987) 2010 NY65


Background


(450263) 2003 WD158    

2003 WD158 was discovered by LINEAR on November 28, 2003.  This object has an
absolute magnitude of 18.8, diameter of 410 m, and an optical 
albedo of 0.34 (Trilling et al. 2010), but otherwise nothing else is known
about its physical properties. 

2003 WD158 will approach within 0.053 au (20.5 lunar distances) on June 15, when it
will be a moderately strong radar target that could be suitable for coarse-resolution
delay-Doppler imaging.



(441987) 2010 NY65
2010 NY65 was discovered by the WISE spacecraft on July 14, 2010.  Data obtained
by the mission suggests a diameter of about 230 meters and a dark optical albedo
of about 0.07.  The rotation period is 4.98 hours and the lightcurve amplitude
is relatively low, suggesting a shape with low elongation.  

This asteroid has been observed extensively with radar during previous apparitions,
and as a result, the orbit has small uncertainties.  We plan to reduce the orbital
uncertainties further, which should increase the SNR of the Yarkovsky effect
detection reported for this object, which will improve constraints on its mass.
Previous radar imaging at Arecibo has revealed a rounded object roughly 300 meters
in diameter.   Given the absolute magnitude of 21.4, the diameter corresponds to 
a dark optical albedo of about 0.06.

NY65 will be a moderately strong radar target in 2021 and possibly suitable for
coarse-resolution imaging.  


Orbital and Physical Characteristics  
Name                     2003 WD158               2010 NY65
Asteroid number          450263                   441987
Discoverer               LINEAR                   WISE
Discovery date           2003 Nov 28              2010 Jul 14
orbit type               Apollo                   Aten
Close approach distance  0.0526 au                0.0399 au
                         20.5 lunar distances     15.5 lunar distances
Close approach date      2021 Jun 15              2021 Jun 25

semimajor axis           1.427 au                 0.9996 au    
eccentricity             0.409                    0.370       
inclination              16.7 deg                 11.7 deg     
Orbital period           1.70 years               0.999 y      
perihelion distance      0.843 au                 0.630 au    
aphelion distance        2.011 au                 1.369 au  
MOID                     0.0465 au                0.0180 au    

absolute magnitude (H)   18.8                     21.4
diameter                 0.4 km                  ~0.3 km     
optical albedo           0.35                     0.06
rotation period          unknown                  4.979 h
lightcurve amplitude     unknown                  0.23 mag 
pole direction           unknown                  unknown    
spectral class           unknown                  unknown; evidently dark
PHA?                     Yes                      Yes                 

Last update: 2021 April 2


Discovery M.P.E.C.


2003 WD158
https://www.minorplanetcenter.net/mpec/K03/K03X07.html

2010 NY65
https://www.minorplanetcenter.net/mpec/K10/K10O14.html


SNR Calculations

Goldstone SNRs
2003 WD158
2003 WD158:  D = 0.41 km,  P = 2.2 h,  OC albedo = 0.1
SNRs assume Ptx = 450 kW and Tsys = 17 K

w  DOY   start date    window       RA, dec   dist  runs  SNR/day SNR/run
23 159  2021 Jun 08  03:20-19:50   317, +67  0.074   407     31      2
23 160  2021 Jun 09  03:33-18:58   312, +63  0.069   408     40      2
23 161  2021 Jun 10  03:43-18:13   308, +58  0.065   410     51      3
23 162  2021 Jun 11  03:51-17:32   305, +53  0.061   412     64      3   
23 163  2021 Jun 12  03:59-16:54   302, +46  0.057   411     77      4   Scheduled 0400-0600
23 164  2021 Jun 13  04:07-16:19   300, +39  0.055   405     89      5   Scheduled 1445-1615. Start early?
24 165  2021 Jun 14  04:16-15:45   297, +32  0.053   393     98      5   Scheduled 0420-0550
24 166  2021 Jun 15  04:25-15:13   295, +24  0.053   373    100      6    
24 167  2021 Jun 16  04:35-14:41   293, +16  0.053   346     94      5
24 168  2021 Jun 17  04:45-14:11   292,  +8  0.055   313     80      5   Scheduled 1240-1410. Start early?
24 169  2021 Jun 18  04:57-13:40   290,  +1  0.057   277     64      4   Scheduled 1120-1310. Start early?
24 170  2021 Jun 19  05:09-13:10   289,  -6  0.061   240     47      3
24 171  2021 Jun 20  05:22-12:41   288, -11  0.065   204     33      3
25 172  2021 Jun 21  05:35-12:11   287, -16  0.070   171     23      2

Elevations > 75 deg:
Jun 12 0940-1125
Jun 13 0905-1130
Jun 14 0855-1115
Jun 15 0910-1035


2010 NY65 2010 NY65: D = 0.3 km, P = 4.979 h, OC albedo = 0.07 DOY start date window RA, dec dist runs SNR/day SNR/run 169-170 2021 Jun 18-19 16:50-02:56 118, +14 0.063 277 26 2 170-171 2021 Jun 19-20 17:01-03:17 123, +15 0.057 309 38 2 171-172 2021 Jun 20-21 17:15-03:43 129, +17 0.052 345 57 3 172-173 2021 Jun 21-22 17:34-04:16 137, +19 0.047 385 83 5 Scheduled 173-174 2021 Jun 22-23 18:00-04:56 146, +21 0.043 423 110 6 174-175 2021 Jun 23-24 18:33-05:42 157, +23 0.041 454 150 7 Scheduled 175-176 2021 Jun 24-25 19:14-06:29 169, +24 0.040 469 160 8 176-177 2021 Jun 25-26 19:59-07:14 182, +24 0.040 464 150 8 Scheduled 177-178 2021 Jun 26-27 20:44-07:52 193, +23 0.042 440 130 7 Scheduled 178-179 2021 Jun 27-28 21:25-08:23 203, +22 0.046 405 95 5 Scheduled 179-180 2021 Jun 28-29 22:00-08:46 211, +20 0.050 367 66 4 180-181 2021 Jun 29-30 22:28-09:03 218, +19 0.055 330 45 3 181-182 2021 Jun 30-01 22:51-09:16 223, +17 0.061 296 31 2 Detailed Schedule: This avoids high elevations when we can't track well: Jun 21 1735-1905 Start during precal? Jun 23 2130-2335 Start during precal? Jun 24 0125-0325 Avoids high elevations. Jun 25-26 2330-0045 Start during precal? Jun 26-27 2300-0100 Start during precal? Jun 27 0300-0725 Jun 27-28 2330-0125 Start during precal? Jun 28 0325-0525

Track Assignments


DOY    BOA   BOT   EOT   EOA
163          0400  0600  0630  GSSR AST 2003 WD158
164          1445  1615  1645  GSSR AST 2003 WD158
165          0420  0550  0620  GSSR AST 2003 WD158
168          1240  1410  1440  GSSR AST 2003 WD158
169          1120  1310  1340  GSSR AST 2003 WD158
172          1735  1905  1935  GSSR AST 2010 NY65
174          2130  2335  0005  GSSR AST 2010 NY65
175          0125  0325  0355  GSSR AST 2010 NY65
176          2330  0045  0115  GSSR AST 2010 NY65
177          2300  0100  0130  GSSR AST 2010 NY65
178          0300  0725  0755  GSSR AST 2010 NY65
178          2330  0125  0155  GSSR AST 2010 NY65
179          0325  0525  0555  GSSR AST 2010 NY65

Goldstone tracks:
        UT                       UT          PDT                 Duration Round-trip     
DOY     Date                     TX Window   TX Window           hh:mm    time (sec)  SNR/run
163     Jun 12    2003 WD158     0400-0600   2100-2300 Jun 11     2:00       57         4
164     Jun 13    2003 WD158     1445-1615   0745-0915 Jun 13     1:30       55         5
165     Jun 14    2003 WD158     0420-0550   2120-2250 Jun 13     1:30       53         5
168     Jun 17    2003 WD158     1240-1410   0540-0710 Jun 17     1:30       55         5
169     Jun 18    2003 WD158     1120-1310   0420-0610 Jun 18     1:50       57         4

172     Jun 21    2010 NY65      1735-1905   1035-1205 Jun 21     1:30       47         5

174     Jun 23    2010 NY65      2130-2335   1430-1635 June 23    2:05 *     41         7
175     Jun 24    2010 NY65      0125-0325   1825-2025 Jun 23     2:00

176-177 Jun 25-26 2010 NY65      2330-0045   1630-1745 Jun 25     1:15       40         8

177-178 Jun 26-27 2010 NY65      2300-0100   1600-1800 Jun 26     2:00       42         7
178     Jun 27    2010 NY65      0300-0725   2000-0025 Jun 26-27  4:25 *

178-179 Jun 27-28 2010 NY65      2330-0125   1630-1825 Jun 27     1:55 *     46         5
179     Jun 28    2010 NY65      0325-0525   2025-2225 Jun 27     2:00

Do we need the full precal time between tracks on 174-175, 177-178, and 178-179?
Those correspond to dates when the elevations are so high that tracking will be difficult.



Uncertainties

2003 WD158
JPL/Horizons solution 83, # obs: 375 (2003-2021)
2021 Apr 2
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.            delta POS_3sigma  DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2021-Jun-09 00:00 *m  314.50258  64.52488 0.07153063476415      3.264        1.43        5.21       0.000191
 2021-Jun-10 00:00 *m  310.24402  60.18035 0.06669252200842      3.499        1.58        5.73       0.000195
 2021-Jun-11 00:00 *m  306.57567  55.06951 0.06236737398519      3.731        1.71        6.23       0.000214
 2021-Jun-12 00:00 *m  303.40129  49.15231 0.05867524974075      3.943        1.82        6.62       0.000246
 2021-Jun-13 00:00 *m  300.63832  42.44144 0.05574972989303      4.112        1.87        6.79       0.000289
 2021-Jun-14 00:00 *m  298.21806  35.03581 0.05372497677567      4.215        1.82        6.62       0.000337
 2021-Jun-15 00:00 *m  296.08424  27.14157 0.05271464985322      4.236        1.67        6.06       0.000385
 2021-Jun-16 00:00 *m  294.19111  19.05890 0.05278755323819      4.169        1.42        5.16       0.000427
 2021-Jun-17 00:00 *m  292.50147  11.12637 0.05395031918356      4.029        1.13        4.11       0.000459
 2021-Jun-18 00:00 *m  290.98510   3.64483 0.05614653670389      3.838        0.86        3.12       0.000480
 2021-Jun-19 00:00 *m  289.61729  -3.17959 0.05927271704458      3.620        0.66        2.38       0.000491
 2021-Jun-20 00:00 *m  288.37775  -9.25032 0.06320215101964      3.393        0.54        1.98       0.000493


2010 NY65 JPL/Horizons solution 146, # obs: 835 (2010-2020) Includes: radar(12 delay, 3 Dop.) 2021 Apr 3 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2021-Jun-18 00:00 *m 114.68945 12.33588 0.06876021405632 0.102 0.03 0.12 0.000019 2021-Jun-19 00:00 *m 118.72373 13.77630 0.06253510759785 0.103 0.03 0.13 0.000020 2021-Jun-20 00:00 *m 123.65452 15.44355 0.05673556774256 0.103 0.04 0.13 0.000022 2021-Jun-21 00:00 *m 129.72261 17.32943 0.05148964515235 0.100 0.04 0.13 0.000023 2021-Jun-22 00:00 *m 137.18862 19.36781 0.04696771274680 0.096 0.03 0.11 0.000024 2021-Jun-23 00:00 * 146.25438 21.39084 0.04338204801275 0.090 0.02 0.06 0.000025 2021-Jun-24 00:00 * 156.90164 23.10351 0.04096579152100 0.086 0.01 0.03 0.000025 2021-Jun-25 00:00 * 168.69689 24.14592 0.03992019990952 0.087 0.03 0.11 0.000024 2021-Jun-26 00:00 * 180.76610 24.27538 0.04034256149189 0.093 0.05 0.20 0.000023 2021-Jun-27 00:00 * 192.11216 23.53002 0.04218177232616 0.101 0.07 0.25 0.000021 2021-Jun-28 00:00 * 202.04873 22.18595 0.04526069111491 0.106 0.07 0.27 0.000018 2021-Jun-29 00:00 * 210.35626 20.56840 0.04934506559141 0.107 0.07 0.26 0.000015 2021-Jun-30 00:00 * 217.14457 18.91662 0.05420702174040 0.106 0.07 0.24 0.000013
Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination: 2003 WD158 2021-May-31 00:00 22.41148 78.82414 0.12662631653798 18.564 n.a. 60.5473 /L 107.1/ 73.6894 2021-Jun-02 00:00 5.58173 78.53742 0.11336881157274 18.213 n.a. 63.3176 /L 92.9/ 53.2997 2021-Jun-04 00:00 347.71974 76.95017 0.10050662538687 17.797 n.a. 66.9389 /L 80.8/ 33.5122 2021-Jun-06 00:00 331.86370 73.62659 0.08821734756969 17.308 n.a. 71.7271 /L 73.8/ 16.9298 2021-Jun-08 00:00 319.45711 68.19729 0.07679033470927 16.741 n.a. 78.1333 /L 74.8/ 5.3658 2021-Jun-10 00:00 310.23224 60.21627 0.06669690886413 16.107 n.a. 86.7550 /L 84.9/ 0.1884 2021-Jun-12 00:00 303.38341 49.19213 0.05867251534998 15.440 n.a. 98.2034 /L 102.2/ 2.2643 2021-Jun-14 00:00 298.19727 35.07621 0.05371381932452 14.819 n.a. 112.5923 /L 120.9/ 11.7121 2021-Jun-16 00:00 294.16917 19.09443 0.05276814695399 14.351 n.a. 128.7066 /L 128.0/ 27.7056 2021-Jun-18 00:00 290.96297 3.67164 0.05612097333169 14.094 n.a. 144.0657 /L 112.9/ 48.3309 2021-Jun-20 00:00 288.35594 -9.23203 0.06317316501616 14.025 n.a. 156.5253 /L 85.0/ 70.3347 2021-Jun-22 00:00 286.19809 -19.14765 0.07293768666403 14.090 n.a. 165.1133 /L 53.3/ 88.9833 2021-Jun-24 00:00 284.38581 -26.53287 0.08455482777483 14.288 n.a. 169.1908 /L 21.2/ 99.0999 2021-Jun-26 00:00 282.84588 -32.03099 0.09743677589066 14.626 n.a. 168.9177 /L 11.8/ 97.7802 2021-Jun-28 00:00 281.52610 -36.17434 0.11121668350974 15.017 n.a. 166.5497 /L 40.6/ 86.2946 2021-Jun-30 00:00 280.38941 -39.34474 0.12567089938283 15.391 n.a. 163.7915 /L 67.7/ 68.6638 2021-Jul-02 00:00 279.40956 -41.80543 0.14066219737816 15.733 n.a. 161.1651 /T 92.6/ 48.9747 2021-Jul-04 00:00 278.56761 -43.73772 0.15610487199283 16.046 n.a. 158.7698 /T 115.9/ 30.2324 2021-Jul-06 00:00 277.84952 -45.26829 0.17194434627899 16.332 n.a. 156.5954 /T 137.5/ 14.6201 2021-Jul-08 00:00 277.24454 -46.48742 0.18814522606975 16.596 n.a. 154.6083 /T 154.9/ 4.0062 2021-Jul-10 00:00 276.74413 -47.46083 0.20468407215887 16.841 n.a. 152.7742 /T 155.8/ 0.0774 2021-Jul-12 00:00 276.34122 -48.23736 0.22154484723970 17.070 n.a. 151.0640 /T 138.4/ 4.0090 2021-Jul-14 00:00 276.02965 -48.85407 0.23871599494588 17.286 n.a. 149.4538 /T 115.6/ 15.9153 2021-Jul-16 00:00 275.80383 -49.33954 0.25618863694922 17.489 n.a. 147.9247 /T 91.0/ 34.4459 2021-Jul-18 00:00 275.65838 -49.71617 0.27395560447979 17.681 n.a. 146.4617 /T 65.7/ 56.6667 2021-Jul-20 00:00 275.58800 -50.00175 0.29201112082260 17.864 n.a. 145.0527 /T 41.4/ 78.1905 2021-Jul-22 00:00 275.58736 -50.21051 0.31035099392639 18.038 n.a. 143.6878 /T 25.2/ 93.9113 2010 NY65 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2021-Jun-15 00:00 106.22276 9.17578 0.08920980148430 25. 9. 25.8385 /T 34.1/ 18.9826 2021-Jun-16 00:00 108.58202 10.06931 0.08217107982561 25. 9. 26.4226 /T 43.0/ 27.7056 2021-Jun-17 00:00 111.37101 11.11874 0.07534953337459 24. 9. 27.3511 /T 52.4/ 37.6073 2021-Jun-18 00:00 114.70635 12.35079 0.06879335525440 24. 9. 28.7572 /T 62.0/ 48.3309 2021-Jun-19 00:00 118.74096 13.79171 0.06256967653166 23. 9. 30.8143 /T 71.5/ 59.4246 2021-Jun-20 00:00 123.67149 15.45919 0.05677176027839 23. 8. 33.7366 /T 80.8/ 70.3347 2021-Jun-21 00:00 129.73824 17.34489 0.05152758765289 22. 8. 37.7654 /T 89.7/ 80.4175 2021-Jun-22 00:00 137.20117 19.38257 0.04700736671584 21. 8. 43.1308 /T 98.0/ 88.9833 2021-Jun-23 00:00 146.26136 21.40447 0.04342307421142 20. 7. 49.9712 /T 105.4/ 95.3794 2021-Jun-24 00:00 156.90025 23.11603 0.04100742747688 19.251 6.913 58.2089 /T 111.5/ 99.0999 2021-Jun-25 00:00 168.68522 24.15814 0.03996128119342 18.578 6.575 67.4376 /T 116.2/ 99.8874 2021-Jun-26 00:00 180.74459 24.28854 0.04038179357380 18.086 6.302 76.9517 /T 119.9/ 97.7802 2021-Jun-27 00:00 192.08353 23.54493 0.04221813469279 17.775 6.089 85.9818 /T 122.9/ 93.0860 2021-Jun-28 00:00 202.01648 22.20253 0.04529368244206 17.617 5.926 93.9779 /T 126.0/ 86.2946 2021-Jun-29 00:00 210.32320 20.58599 0.04937466907016 17.569 5.801 100.7185 /T 129.4/ 77.9701 2021-Jun-30 00:00 217.11241 18.93449 0.05423352163054 17.596 5.705 106.2352 /T 133.4/ 68.6638 2021-Jul-01 00:00 222.62745 17.37842 0.05968081528167 17.670 5.631 110.6841 /T 137.7/ 58.8627 2021-Jul-02 00:00 227.12488 15.97028 0.06557136600239 17.772 5.573 114.2525 /T 142.1/ 48.9747 2021-Jul-03 00:00 230.82582 14.71967 0.07179826739768 17.890 5.529 117.1138 /T 146.0/ 39.3365 2021-Jul-04 00:00 233.90598 13.61644 0.07828401861876 18.017 5.494 119.4126 /T 149.0/ 30.2324 2021-Jul-05 00:00 236.50038 12.64336 0.08497254640999 18.147 5.467 121.2638 /T 150.3/ 21.9149 2021-Jul-06 00:00 238.71167 11.78203 0.09182306364680 18.279 5.447 122.7572 /T 149.2/ 14.6201 2021-Jul-07 00:00 240.61786 11.01540 0.09880563346884 18.409 5.431 123.9620 /T 145.7/ 8.5768 2021-Jul-08 00:00 242.27863 10.32863 0.10589804631065 18.537 5.420 124.9320 /T 140.1/ 4.0062 2021-Jul-09 00:00 243.74005 9.70918 0.11308363676138 18.662 5.412 125.7093 /T 133.0/ 1.1144 2021-Jul-10 00:00 245.03801 9.14658 0.12034975385731 18.785 5.406 126.3267 /T 124.8/ 0.0774

Setups



2003 WD158:
Expected bandwidth: ~20 Hz...?


2010 NY65:
Expected bandwidth: 6 Hz



CW setup:
---------------------------------------------------------------------------
TX polarization           RCP
RCV polarization          LCP & RCP
Frequency hops:           no hopping
Bandwidth:               5000 Hz 
TXoffset                 +500 Hz
FFT                      2500 for 2.0 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       245 Hz   
FFT             128
resolution        3.8 Hz
TXoffset        +50 Hz  (echo in column 116)
---------------------------------------------------------------------

Instructions

NOTE: Data should be moved to the appropriate subdirectories in aardvark:/export/data0/a450263/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

2003 WD158 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/2003WD158/2003WD158.2021.goldstone.planning.html

Asteroid Radar Astronomy
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