Goldstone Radar Observations Planning: (163899) 2003 SD220, 4660 Nereus, and 2008 UZ94


Background


(163899) 2003 SD220
2003 SD220 was discovered by LONEOS on September 29, 2003, and subsequently linked with 2000 AD229, 
which was also discovered by LONEOS on 2000 January 6.  Although this object has two provisional designations,
it is currently known as 2003 SD220.  

2003 SD220 has an extremely slow rotation period of roughly 12 days, and lightcurves suggest
non-principal axis rotation (Warner 2016, Carbognani and Buzzi 2016).  Radar images at Goldstone 
and Arecibo in 2015 and 2018 revealed a  
highly-elongated and very-slowly rotating object that is consistent with expectations
from the lightcurves.  The 2015 radar images provided a small number of snapshots that did
not cover much rotation so a significant fraction of the surface has not yet been seen.
Nugent et al. (2016) estimated a diameter of 0.8 +- 0.02 km and
an optical albedo of 0.3 +- 0.04 from thermal IR observations by the NEOWISE spacecraft. 
Vis-IR observations by Perna et al. (2016) place 2003 SD220 in the Sr spectral class.   

2003 SD220 will approach within 0.036 au on 2021 December 17 when it will be one of the strongest 
radar targets of the year, with signal-to-noise ratios per run at Goldstone strong enough for 
high-resolution delay-Doppler imaging.  An extensive campaign is scheduled at Goldstone starting
on November 22 and spanning several weeks. 

2003 SD220 has an orbital period of 0.754 years and is currently close to a 4:3 mean motion 
resonance with Earth; flybys within 0.1 au began in 2015 and will occur at three year 
intervals until 2024.  The repeated opportunities to obtain 
ranging measurements may lead to detection of the Yarkovsky effect for this object.
This asteroid also approaches within 0.1 au of Venus relatively often. 

The Minor Planet Center has classified 2003 SD220 as a "Potentially Hazardous Asteroid."
This asteroid is on NASA's NHATS list of potential spacecraft mission targets, although
no actual mission is planned to visit this asteroid.


(4660) Nereus Nereus was discovered in February, 1982 by E. F. Helin using the 18" Schmidt telescope at Palomar. Some of its physical properties were studied during the most recent close approach in 2002. This object is elongated with an effective diameter of 330 meters, has a rotation period of 15 hours, and is a member of the optically-bright E spectral class. Goldstone and Arecibo radar images in 2002 revealed that Nereus is somewhat angular and that it has a high circular polarization ratio of about 0.7 (Brozovic et al. 2009). This object is elongated with an effective diameter of 330 meters, has a rotation period of 15 hours, and is a member of the optically-bright E spectral class. In 2021 Nereus will approach within 0.0263 au on Dec. 11 and it will be a strong radar target for several weeks. We expect to obtain delay-Doppler images with resolutions several times finer than the most detailed images obtained in 2002. Consequently, it is likely that surface features will be visible that we did not see in 2002. Goldstone observations are scheduled starting on December 5 and will last about two weeks. Due to the long arc of optical and radar observations, a radar ranging detection in 2021 may show the acceleration of the Yarkovsky effect and facilitate estimation of the mass and bulk density. Nereus has been considered as a possible spacecraft target for many years so the 2021 encounter provides an important opporunity to learn more about this important asteroid. Nereus makes close approaches to both Earth and Mars several times each century. The 2021 flyby will be the closest with Earth until 2060 when Nereus will approach within 0.008 au.
(518678) 2008 UZ94 2008 UZ94 was discovered in October 2008 by LINEAR. Its absolute magnitude of 17.4 suggests a diameter of about 1 km but otherwise nothing is known about its physical properties. This asteroid will approach within 0.059 au on December 5 when it will be a moderately strong radar target suitable for CW observations, ranging, and perhaps coarse-resolution imaging. Observations are scheduled at Goldstone on December 1. UZ94 will brighten to about 15th magnitude a few days after the closest approach, although the solar elongations will be only ~70-90 degrees. NASA's NEOWISE spacecraft observed this asteroid in September, 2021. J. Masiero reports a preliminary diameter of 960+-300 m estimated from NEOWISE data.
Orbital and Physical Characteristics  
Name                     2003 SD220                Nereus (1982 DB)      2008 UZ94
Number                   163899                    4660                  518678
Discoverer               LONEOS.                   E. F. Helin           LINEAR
Discovery date           2003 September 29         1982 February 28      2008 Oct 28
orbit type               Aten                      Apollo                Apollo
Close approach dist.     0.036 au                  0.0263 au             0.0593 au
Close approach dist.     14.1 lunar distances      10.2 lunar distances  23.1 lunar distances
Close approach date      2021 December 17          2021 Dec 11           2021 Dec 5

semimajor axis           0.828 au                  1.489 au              2.191 au
eccentricity             0.210                     0.360                 0.572
inclination              8.5 deg                   1.4 deg               30.2
Orbital period           0.754 years               1.82 years            3.24 y
perihelion distance      0.655 au                  0.953 au              0.938 au
aphelion distance        1.002 au                  2.025 au              3.444 au
MOID                     0.0192 au                 0.00325 au            0.024 au

absolute magnitude (H)   17.3                      18.3                  17.4
diameter                 0.8 +- 0.02 km            0.33 km               0.96+-0.3 km (J. Masiero, pers. comm.)
optical albedo           0.3 +- 0.04               0.54                 ~0.2          (J. Masiero, pers. comm.)
rotation period         ~287 h                     15.16 h               unknown
lightcurve amplitude    ~0.7 mag                   0.6 mag               unknown
spectral class           Sr                        Xe                    unknown
                         PHA, NHATS                PHA, NHATS            PHA

Last update: 2021 September 21

Discovery M.P.E.C.


2003 SD220
https://minorplanetcenter.net/mpec/K03/K03S91.html

Nereus (1982 DB)
http://www.cbat.eps.harvard.edu/iauc/03600/03675.html

2008 UZ94
https://www.minorplanetcenter.net/mpec/K08/K08U91.html


SNR Calculations


2003 SD220
GOLDSTONE SNRs
2003 SD220:  D = 0.7 km,  P = 287 h,  OC albedo = 0.1

w  DOY        start date      window      RA, dec   dist  runs   SNR/day  SNR/run
45 314-315  2021 Nov 10-11  08:14-01:20  184, +68  0.116   261     120       9
45 315-316  2021 Nov 11-12  08:10-01:24  185, +68  0.114   269     140       9
45 316-317  2021 Nov 12-13  08:05-01:29  186, +68  0.111   277     150      10
45 317-318  2021 Nov 13-14  08:00-01:35  187, +69  0.109   286     160      11
45 318-319  2021 Nov 14-15  07:55-01:41  188, +69  0.106   296     180      12
46 319-320  2021 Nov 15-16  07:49-01:49  190, +70  0.104   307     200      13
46 320-321  2021 Nov 16-17  07:44-01:58  191, +70  0.101   319     220      14
46 321-322  2021 Nov 17-18  07:38-02:08  192, +71  0.098   332     250      15
46 322-323  2021 Nov 18-19  07:31-02:20  194, +71  0.096   346     280      17
46 323-324  2021 Nov 19-20  07:24-02:34  196, +72  0.093   362     310      18
46 324-325  2021 Nov 20-21  07:17-02:50  197, +72  0.091   380     350      20 
46 325-326  2021 Nov 21-22  07:08-03:11  200, +73  0.088   401     400      22 
47 326-327  2021 Nov 22-23  06:58-03:36  202, +73  0.085   425     450      25  Scheduled 0700-1230 Nov 22          
47 327-328  2021 Nov 23-24  06:45-04:10  205, +74  0.083   454     520      28  Scheduled 0645-1245 Nov 23          
47 328-329  2021 Nov 24-25  06:26-05:16  208, +74  0.080   495     600      31  Scheduled 0630-1300 Nov 24          
47 329-330  2021 Nov 25-26  05:38-03:47  211, +75  0.077   545     700      35  Thanksgiving.  Circumpolar starts
47 330-331  2021 Nov 26-27  07:29-04:23  215, +75  0.075   564     810      39  Thanksgiving evening
47 331-332  2021 Nov 27-28  07:20-05:08  220, +76  0.072   584     930      44
47 332-333  2021 Nov 28-29  07:08-04:52  225, +76  0.069   605    1100      50  
48 333-334  2021 Nov 29-30  08:02-05:31  232, +77  0.067   628    1300      57  Scheduled 0805-1345 Nov 29          
...next two dates are the same...
48 334-335  2021 Nov 30-01  08:09-06:07  239, +77  0.064   653    1500      66  Scheduled 0900-1300 Nov 30          
48 334-335  2021 Nov 30-01  08:09-06:07  239, +77  0.064   653    1500      66  Scheduled 0220-0605 Dec  1 w/UZ94   
...
48 335-336  2021 Dec 01-02  08:26-06:32  246, +77  0.062   679    1700      76  
48 336-337  2021 Dec 02-03  08:59-06:45  255, +77  0.059   707    2000      87  Scheduled 1115-1335 Dec  2          
48 337-338  2021 Dec 03-04  09:49-06:49  264, +76  0.057   737    2400     100
48 338-339  2021 Dec 04-05  10:48-06:50  272, +76  0.054   768    2800     120  Scheduled 1105-1325 Dec  4          
48 339-340  2021 Dec 05-06  11:49-08:20  281, +74  0.052   763    3300     140                Circumpolar ends
49 340-341  2021 Dec 06-07  11:16-07:50  288, +73  0.050   704    3800     160  Scheduled 1120-1320 Dec  6          
49 341-342  2021 Dec 07-08  12:35-07:32  295, +71  0.048   678    4400     190  Scheduled 0630-1310 Dec  8 w/Nereus 
49 342-343  2021 Dec 08-09  13:37-07:17  301, +68  0.046   661    5100     220  Scheduled 0610-1305 Dec  9 w/Nereus 
49 343-344  2021 Dec 09-10  14:27-07:05  306, +66  0.044   649    5900     250  
49 344-345  2021 Dec 10-11  15:09-06:53  310, +62  0.042   639    6700     290 
49 345-346  2021 Dec 11-12  15:45-06:43  314, +59  0.041   630    7600     330 
49 346-347  2021 Dec 12-13  16:15-06:32  317, +55  0.039   621    8500     370 
50 347-348  2021 Dec 13-14  16:42-06:22  320, +51  0.038   611    9200     400 
50 348-349  2021 Dec 14-15  17:06-06:12  323, +46  0.037   600    9900     440 
50 349-350  2021 Dec 15-16  17:26-06:01  325, +42  0.037   585   10000     460 
50 350-351  2021 Dec 16-17  17:45-05:51  327, +37  0.036   568   10000     480  Scheduled 0415-0550                 
50 351-352  2021 Dec 17-18  18:02-05:40  328, +32  0.036   547   10000     480 
50 352-353  2021 Dec 18-19  18:18-05:29  330, +27  0.036   523    9900     470  Scheduled 0100-0525                 
50 353-354  2021 Dec 19-20  18:33-05:18  331, +22  0.037   497    9300     450  Scheduled 0215-0515                 
51 354-355  2021 Dec 20-21  18:46-05:06  332, +17  0.038   469    8500     420 
51 355-356  2021 Dec 21-22  18:59-04:55  334, +13  0.039   440    7500     380 
51 356-357  2021 Dec 22-23  19:11-04:43  335,  +9  0.040   410    6500     350  Scheduled 0240-0440                 
51 357-358  2021 Dec 23-24  19:22-04:31  335,  +5  0.041   380    5500     310 
51 358-359  2021 Dec 24-25  19:33-04:19  336,  +1  0.043   352    4600     270 Christmas Eve
51 359-360  2021 Dec 25-26  19:43-04:07  337,  -2  0.045   324    3800     230 Christmas
51 360-361  2021 Dec 26-27  19:52-03:55  338,  -6  0.047   298    3100     200  Scheduled 2335-0240                 
52 361-362  2021 Dec 27-28  20:01-03:43  338,  -9  0.049   273    2500     170 
52 362-363  2021 Dec 28-29  20:10-03:31  339, -11  0.051   250    2000     140  Scheduled 0130-0320                 
52 363-364  2021 Dec 29-30  20:18-03:19  339, -14  0.053   228    1600     120 
52 364-365  2021 Dec 30-31  20:26-03:06  339, -16  0.056   208    1300     100  Scheduled 0130-0245                 
52 365-  1  2021 Dec 31-01  20:34-02:54  340, -18  0.058   190    1100      84 New Year's Eve
52   1-  2  2022 Jan 01-02  20:41-02:41  340, -20  0.061   172     860      71 New Year's Day
52   2-  3  2022 Jan 02-03  20:48-02:28  340, -22  0.063   156     690      60
 1   3-  4  2022 Jan 03-04  20:55-02:15  341, -23  0.066   141     560      51 
 1   4-  5  2022 Jan 04-05  21:02-02:02  341, -25  0.069   127     450      43 
 1   5-  6  2022 Jan 05-06  21:09-01:48  341, -26  0.072   114     370      36 
 1   6-  7  2022 Jan 06-07  21:16-01:34  341, -28  0.074   101     300      31 
 1   7-  8  2022 Jan 07-08  21:24-01:20  341, -29  0.077    89     240      27
 1   8-  9  2022 Jan 08-09  21:31-01:05  341, -30  0.080    78     190      23
 1   9- 10  2022 Jan 09-10  21:40-00:48  341, -31  0.083    67     160      20
 2  10- 11  2022 Jan 10-11  21:49-00:31  341, -32  0.086    55     120      17
 2  11- 12  2022 Jan 11-12  22:00-00:12  341, -33  0.089    43      96      15


Nereus Goldstone SNRs Nereus: D = 0.33 km, P = 15.1 h, OC albedo = 0.4, pole = ( 25, +80) w DOY start date window RA, dec dist delta runs SNR/day SNR/run 46 322 2021 Nov 18 01:20-13:09 49, +35 0.097 -24 220 69 5 46 323 2021 Nov 19 01:15-13:09 49, +35 0.093 -25 232 83 6 46 324 2021 Nov 20 01:10-13:08 50, +36 0.088 -26 244 100 7 46 325 2021 Nov 21 01:06-13:08 50, +37 0.084 -26 257 120 8 47 326 2021 Nov 22 01:01-13:09 50, +38 0.080 -27 272 150 10 Overlaps 2003 SD220 47 327 2021 Nov 23 00:56-13:10 51, +39 0.076 -28 288 180 12 Overlaps 2003 SD220 47 328 2021 Nov 24 00:51-13:11 52, +40 0.073 -28 306 230 14 Overlaps 2003 SD220 47 329 2021 Nov 25 00:47-13:14 52, +41 0.069 -29 326 290 17 47 330 2021 Nov 26 00:42-13:17 53, +42 0.065 -30 349 360 21 Thanksgiving 47 331 2021 Nov 27 00:37-13:21 54, +44 0.061 -31 374 460 26 Thanksgiving 47 332 2021 Nov 28 00:33-13:27 55, +45 0.058 -32 403 600 32 48 333 2021 Nov 29 00:28-13:35 56, +47 0.054 -34 436 780 41 Overlaps 2003 SD220 48 334 2021 Nov 30 00:24-13:45 58, +49 0.051 -35 473 1000 52 Overlaps 2003 SD220 48 335 2021 Dec 01 00:20-13:58 60, +51 0.047 -37 517 1400 66 Overlaps 2003 SD220 48 336 2021 Dec 02 00:16-14:16 63, +53 0.044 -38 568 1900 86 Overlaps 2003 SD220 48 337 2021 Dec 03 00:14-14:39 66, +56 0.041 -40 628 2600 110 48 338 2021 Dec 04 00:12-15:11 70, +59 0.038 -42 700 3600 150 Overlaps 2003 SD220 48 339 2021 Dec 05 00:13-15:56 77, +62 0.035 -44 787 5000 190 Scheduled 0655-1245 49 340 2021 Dec 06 00:18-16:59 85, +65 0.033 -46 891 6900 250 Overlaps 2003 SD220 49 341 2021 Dec 07 00:32-18:24 98, +68 0.031 -47 1012 9500 330 Scheduled 0615-1315 49 342 2021 Dec 08 01:07-19:52 117, +69 0.029 -48 1121 12000 410 Scheduled 0630-1310 w/2003 SD220 49 343 2021 Dec 09 02:22-20:51 138, +69 0.027 -48 1158 15000 500 Scheduled 0610-1305 w/2003 SD220 49 344 2021 Dec 10 04:13-21:17 158, +65 0.027 -47 1112 17000 550 Scheduled 0640-1305 49 345 2021 Dec 11 05:57-21:25 172, +60 0.026 -45 1033 17000 560 49 346 2021 Dec 12 07:13-21:26 182, +53 0.027 -41 947 15000 520 Scheduled 0940-1310 50 347 2021 Dec 13 08:08-21:23 188, +47 0.027 -37 862 12000 450 Scheduled 0810-0945 50 348 2021 Dec 14 08:48-21:17 193, +40 0.029 -33 779 9600 380 Scheduled 0850-1245 50 349 2021 Dec 15 09:18-21:10 197, +34 0.030 -29 701 7300 300 Scheduled 0930-1240 50 350 2021 Dec 16 09:41-21:03 200, +29 0.032 -25 630 5400 230 50 351 2021 Dec 17 09:59-20:56 202, +24 0.035 -21 566 4000 180 50 352 2021 Dec 18 10:14-20:49 204, +20 0.037 -18 510 2900 140 50 353 2021 Dec 19 10:26-20:41 205, +17 0.040 -15 461 2200 110 51 354 2021 Dec 20 10:36-20:34 207, +13 0.043 -13 418 1600 85 51 355 2021 Dec 21 10:44-20:27 208, +11 0.046 -11 381 1209 67 51 356 2021 Dec 22 10:51-20:21 209, +8 0.049 -9 349 920 53 51 357 2021 Dec 23 10:57-20:14 210, +6 0.052 -7 320 700 42 51 358 2021 Dec 24 11:01-20:08 210, +4 0.056 -6 296 540 34 Christmas Eve 51 359 2021 Dec 25 11:05-20:02 211, +3 0.059 -4 274 430 28 Christmas 51 360 2021 Dec 26 11:09-19:56 212, +1 0.062 -3 255 340 23 52 361 2021 Dec 27 11:11-19:50 212, 0 0.066 -2 238 270 19 52 362 2021 Dec 28 11:14-19:44 213, -2 0.069 -1 223 220 16 52 363 2021 Dec 29 11:15-19:39 213, -3 0.072 0 209 180 13 52 364 2021 Dec 30 11:17-19:34 214, -4 0.076 +1 197 150 11 52 365 2021 Dec 31 11:18-19:28 214, -5 0.079 +1 186 120 10 New Year's Eve 52 1 2022 Jan 01 11:19-19:23 215, -6 0.083 +2 176 100 8 New Year's day 52 2 2022 Jan 02 11:20-19:18 215, -6 0.086 +3 167 85 7 01 3 2022 Jan 03 11:20-19:13 215, -7 0.090 +3 159 72 6 01 4 2022 Jan 04 11:20-19:08 216, -8 0.093 +4 151 61 5 01 5 2022 Jan 05 11:20-19:03 216, -8 0.096 +4 144 53 5 SNRs above use the total power radar albedo because SC/OC = 0.75.
2008 UZ94 2008 UZ94: D = 1 km, P = 2.2 h, OC albedo = 0.1 w DOY start date window RA, dec dist runs SNR/day SNR/run 47 331-332 2021 Nov 27 17:48-04:11 295, +18 0.102 183 26 2 47 332-333 2021 Nov 28 18:02-04:08 298, +14 0.093 195 38 3 48 333-334 2021 Nov 29 18:21-04:03 301, +10 0.084 207 56 4 48 334-335 2021 Nov 30 18:44-03:57 304, +5 0.076 216 80 6 48 335-336 2021 Dec 01 19:15-03:48 308, -2 0.069 220 110 8 Scheduled on Dec. 1 0220-0348 with SD220 48 336-337 2021 Dec 02 19:57-03:35 313, -10 0.064 213 140 10 48 337-338 2021 Dec 03 20:54-03:14 319, -19 0.061 186 140 12 48 338-339 2021 Dec 04 22:20-02:33 325, -28 0.059 126 110 11

Track Assignments


DOY  BOA   BOT   EOT   EOA

...Coming soon...



Goldstone tracks:
     UT                     UT          PST                 Duration Round-trip  
DOY  Date       Target      TX Window   TX Window           hh:mm    time (sec)  SNR/run 
326  Nov 22     2003 SD220  0700-1230   2300-0430 Nov 21-22  5:30     85           25
326  Nov 22     Nereus      0700-1230   2300-0430 Nov 21-22  5:30     80           10

327  Nov 23     2003 SD220  0645-1245   2245-0445 Nov 22-23  6:00     83           28
327  Nov 23     Nereus      0645-1245   2245-0445 Nov 22-23  6:00     76           12

328  Nov 24     2003 SD220  0630-1300   2230-0500 Nov 23-24  6:30     80           31
328  Nov 24     Nereus      0630-1300   2230-0500 Nov 23-24  6:30     73           14

333  Nov 29     2003 SD220  0805-1345   0005-0545 Nov 29     5:40     67           57
333  Nov 29     Nereus      0805-1335   0005-0535 Nov 29     5:30     54           41

334  Nov 30     2003 SD220  0900-1300   0100-0500 Nov 30     4:00     64           66
334  Nov 30     Nereus      0900-1300   0100-0500 Nov 30     4:00     51           52

336  Dec  1     2008 UZ94   0220-0345   1820-1945 Nov 30     1:25     69            8
335  Dec  1     2003 SD220  0220-0605   1820-2205 Nov 30     3:45     64           66
335  Dec  1     Nereus      0220-0605   1820-2205 Nov 30     3:45     47           66

336  Dec  2     2003 SD220  1115-1335   0315-0535 Dec  2     2:20     59           87
336  Dec  2     Nereus      1115-1335   0315-0535 Dec  2     2:20     44           86

338  Dec  4     2003 SD220  1105-1325   0305-0525 Dec  3     2:20     54          120
338  Dec  4     Nereus      1105-1325   0305-0525 Dec  3     2:20     38          150

339  Dec  5     Nereus      0655-1245   2255-0445 Dec  4- 5  5:50     35          190  No overlap with SD220

340  Dec  6     2003 SD220  1120-1320   0320-0520 Dec  6     2:00     52          160  
340  Dec  6     Nereus      1120-1320   0320-0520 Dec  6     2:00     33          250  

341  Dec  7     Nereus      0615-1315   2215-0515 Dec  6- 7  7:00     31          330  
341  Dec  7     2003 SD220  1235-1315   0435-0515 Dec  7     0:40     48          190  Brief overlap

342  Dec  8     2003 SD220  0630-0730   2230-2330 Dec  7     1:00     48          190
342  Dec  8     Nereus      0630-1310   2230-0510 Dec  7- 8  6:40     29          410

343  Dec  9     2003 SD220  0610-0715   2210-2315 Dec  8     1:05     46          220
343  Dec  9     Nereus      0610-1305   2210-0505 Dec  8- 9  6:55     27          500

344  Dec 10     Nereus      0640-1305   2240-0505 Dec 10     6:25     27          550  No overlap with SD220
 
346  Dec 12     Nereus      0940-1310   0140-0510 Dec 12     3:30     27          520  No overlap with SD220

347  Dec 13     Nereus      0810-0945   0010-0145 Dec 13     1:35     27          450  No overlap with SD220

348  Dec 14     Nereus      0850-1245   0050-0445 Dec 14     3:55     29          380  No overlap with SD220

349  Dec 15     Nereus      0930-1240   0130-0440 Dec 15     3:10     30          300  No overlap with SD220

349  Dec 15     Nereus      2230-2330   1430-1530 Dec 15     1:00     30               DSS-43

350  Dec 16     2003 SD220  0635-0830   2235-0030 Dec 15-16  1:55     37               DSS-43

351  Dec 17     2003 SD220  0415-0550   2015-2150 Dec 16     1:35     35          180  No overlap with Nereus

353  Dec 19     2003 SD220  0100-0525   1700-2125 Dec 18     4:25     36          470  No overlap with Nereus

353  Dec 19     2003 SD220  0610-0830   2210-0030 Dec 18-19  2:20     36               DSS-43

353  Dec 19     2003 SD220  0215-0515   1815-2115 Dec 18     3:00     37          450  No overlap with Nereus

355  Dec 21     2003 SD220  0545 0830   2145-0030 Dec 20-21  2:45     38               DSS-43
 
357  Dec 23     2003 SD220  0240 0440   1840-2040 Dec 22     2:00     40          350  No overlap with Nereus
 
360  Dec 26-27  2003 SD220  2335 0240   1535-1840 Dec 26     2:05     47          200  No overlap with Nereus
 
363  Dec 29     2003 SD220  0130 0320   1730-1920 Dec 28     1:50     51          140  No overlap with Nereus
 
365  Dec 31     2003 SD220  0130 0245   1730-1845 Dec 30     1:15     56          100  No overlap with Nereus

Check for high elevation angles with Nereus.

We need DSS-13  for some of the SD220 tracks.



Uncertainties


2003 SD220
JPL/Horizons solution 126, # obs: 1187 (2000-2021)
2021 July 7
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.            delta POS_3sigma  DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2021-Nov-10 00:00 *m  183.87364  67.22654 0.11791055370921      0.306        0.05        0.18       0.000062
 2021-Nov-11 00:00 *m  184.71199  67.59892 0.11545815054862      0.314        0.05        0.19       0.000060
 2021-Nov-12 00:00 *m  185.60824  67.98505 0.11298116533646      0.323        0.05        0.20       0.000058
 2021-Nov-13 00:00 *m  186.56934  68.38566 0.11048103608975      0.331        0.06        0.21       0.000056
 2021-Nov-14 00:00 *m  187.60355  68.80148 0.10795922528765      0.341        0.06        0.22       0.000053
 2021-Nov-15 00:00 *m  188.72058  69.23324 0.10541723791085      0.350        0.06        0.23       0.000051
 2021-Nov-16 00:00 *m  189.93200  69.68160 0.10285663959786      0.361        0.07        0.24       0.000049
 2021-Nov-17 00:00 *m  191.25151  70.14714 0.10027907505770      0.372        0.07        0.26       0.000046
 2021-Nov-18 00:00 *m  192.69553  70.63029 0.09768628724427      0.383        0.07        0.27       0.000043
 2021-Nov-19 00:00 *   194.28374  71.13124 0.09508013783445      0.395        0.08        0.28       0.000040
 2021-Nov-20 00:00 *   196.03984  71.64981 0.09246262945346      0.408        0.08        0.30       0.000037
 2021-Nov-21 00:00 *   197.99250  72.18533 0.08983593000367      0.422        0.09        0.32       0.000034
 2021-Nov-22 00:00 *   200.17643  72.73637 0.08720239946549      0.437        0.09        0.34       0.000031
 2021-Nov-23 00:00 *   202.63374  73.30043 0.08456461967775      0.452        0.10        0.36       0.000027
 2021-Nov-24 00:00 *   205.41530  73.87348 0.08192542783996      0.468        0.10        0.38       0.000023
 2021-Nov-25 00:00 *   208.58209  74.44939 0.07928795474613      0.486        0.11        0.40       0.000019
 2021-Nov-26 00:00 *   212.20603  75.01905 0.07665566897907      0.504        0.12        0.43       0.000015
 2021-Nov-27 00:00 *   216.36929  75.56930 0.07403242838889      0.523        0.13        0.45       0.000011
 2021-Nov-28 00:00 *   221.16060  76.08155 0.07142254007624      0.543        0.13        0.49       0.000006
 2021-Nov-29 00:00 *   226.66581  76.53025 0.06883082973692      0.565        0.14        0.52       0.000005
 2021-Nov-30 00:00 *   232.94955  76.88149 0.06626272057216      0.587        0.15        0.55       0.000008
 2021-Dec-01 00:00 *   240.02612  77.09234 0.06372432112857      0.610        0.16        0.59       0.000013
 2021-Dec-02 00:00 *   247.82350  77.11211 0.06122252076421      0.634        0.17        0.63       0.000019
 2021-Dec-03 00:00 *   256.15572  76.88623 0.05876509159800      0.658        0.19        0.68       0.000026
 2021-Dec-04 00:00 *m  264.72791  76.36281 0.05636079735765      0.683        0.20        0.73       0.000033
 2021-Dec-05 00:00 *m  273.18865  75.49959 0.05401951197685      0.708        0.21        0.78       0.000041
 2021-Dec-06 00:00 *m  281.21192  74.26830 0.05175235164416      0.732        0.23        0.83       0.000049
 2021-Dec-07 00:00 *m  288.56532  72.65438 0.04957181976943      0.754        0.24        0.88       0.000058
 2021-Dec-08 00:00 *m  295.13359  70.65342 0.04749195337120      0.774        0.26        0.93       0.000068
 2021-Dec-09 00:00 *m  300.90095  68.26683 0.04552844378660      0.790        0.27        0.98       0.000078
 2021-Dec-10 00:00 *m  305.91598  65.49911 0.04369868838160      0.801        0.28        1.02       0.000088
 2021-Dec-11 00:00 *m  310.25874  62.35724 0.04202171613324      0.805        0.29        1.04       0.000099
 2021-Dec-12 00:00 *m  314.01820  58.85213 0.04051792084208      0.800        0.29        1.05       0.000110
 2021-Dec-13 00:00 *m  317.27967  55.00118 0.03920853576791      0.786        0.29        1.04       0.000121
 2021-Dec-14 00:00 *m  320.11917  50.83146 0.03811480101193      0.760        0.28        1.00       0.000131
 2021-Dec-15 00:00 *m  322.60184  46.38229 0.03725681970714      0.723        0.26        0.93       0.000142
 2021-Dec-16 00:00 *m  324.78225  41.70671 0.03665217475327      0.676        0.23        0.83       0.000151
 2021-Dec-17 00:00 *m  326.70566  36.87068 0.03631447234406      0.622        0.19        0.70       0.000159
 2021-Dec-18 00:00 *m  328.40939  31.94994 0.03625205868233      0.567        0.15        0.55       0.000166
 2021-Dec-19 00:00 *   329.92420  27.02458 0.03646717697881      0.516        0.11        0.39       0.000171
 2021-Dec-20 00:00 *   331.27549  22.17249 0.03695576250666      0.475        0.06        0.22       0.000175
 2021-Dec-21 00:00 *   332.48428  17.46313 0.03770792602040      0.450        0.02        0.06       0.000176
 2021-Dec-22 00:00 *   333.56804  12.95280 0.03870900737100      0.440        0.03        0.09       0.000177
 2021-Dec-23 00:00 *   334.54137   8.68236 0.03994096181120      0.444        0.06        0.22       0.000176
 2021-Dec-24 00:00 *   335.41650   4.67710 0.04138381138831      0.455        0.09        0.32       0.000173
 2021-Dec-25 00:00 *   336.20374   0.94850 0.04301694463980      0.470        0.11        0.40       0.000170
 2021-Dec-26 00:00 *   336.91179  -2.50312 0.04482013910310      0.485        0.13        0.46       0.000166
 2021-Dec-27 00:00 *   337.54807  -5.68567 0.04677427063862      0.498        0.14        0.51       0.000162
 2021-Dec-28 00:00 *   338.11887  -8.61259 0.04886173680492      0.508        0.15        0.54       0.000157
 2021-Dec-29 00:00 *   338.62955 -11.30058 0.05106665392458      0.515        0.15        0.56       0.000152
 2021-Dec-30 00:00 *   339.08469 -13.76792 0.05337489607818      0.519        0.16        0.57       0.000147
 2021-Dec-31 00:00 *   339.48814 -16.03323 0.05577403874287      0.520        0.16        0.57       0.000142
 2022-Jan-01 00:00 *   339.84316 -18.11470 0.05825325724061      0.519        0.16        0.58       0.000136

Nereus
JPL/Horizons solution 127, # obs: 717 (1981-2020)
2021 July 7
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.            delta POS_3sigma  DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2021-Nov-15 00:00 *m   48.28198  32.59912 0.11109594010871      1.120        0.11        0.39       0.000144
 2021-Nov-16 00:00 *m   48.48782  33.16031 0.10670513294171      1.168        0.10        0.36       0.000148
 2021-Nov-17 00:00 *m   48.71729  33.75840 0.10237644760920      1.220        0.09        0.34       0.000152
 2021-Nov-18 00:00 *m   48.97421  34.39756 0.09810884496069      1.276        0.09        0.31       0.000155
 2021-Nov-19 00:00 *    49.26306  35.08255 0.09390151037627      1.336        0.08        0.28       0.000159
 2021-Nov-20 00:00 *    49.58913  35.81886 0.08975389491552      1.400        0.07        0.25       0.000162
 2021-Nov-21 00:00 *    49.95879  36.61278 0.08566576443134      1.470        0.06        0.22       0.000164
 2021-Nov-22 00:00 *    50.37976  37.47162 0.08163725936534      1.547        0.06        0.21       0.000166
 2021-Nov-23 00:00 *    50.86152  38.40385 0.07766896896231      1.630        0.06        0.22       0.000167
 2021-Nov-24 00:00 *    51.41588  39.41929 0.07376202489504      1.721        0.07        0.27       0.000168
 2021-Nov-25 00:00 *    52.05775  40.52944 0.06991822079903      1.822        0.10        0.35       0.000167
 2021-Nov-26 00:00 *    52.80621  41.74764 0.06614016607445      1.933        0.13        0.46       0.000166
 2021-Nov-27 00:00 *    53.68616  43.08948 0.06243148469126      2.056        0.17        0.60       0.000163
 2021-Nov-28 00:00 *    54.73063  44.57296 0.05879707283716      2.194        0.22        0.78       0.000159
 2021-Nov-29 00:00 *    55.98437  46.21871 0.05524343327723      2.346        0.27        1.00       0.000154
 2021-Nov-30 00:00 *    57.50943  48.04990 0.05177910933542      2.517        0.35        1.26       0.000147
 2021-Dec-01 00:00 *    59.39398  50.09145 0.04841524717541      2.708        0.43        1.58       0.000138
 2021-Dec-02 00:00 *    61.76692  52.36801 0.04516632015881      2.921        0.54        1.96       0.000126
 2021-Dec-03 00:00 *    64.82233  54.89909 0.04205104922665      3.158        0.67        2.42       0.000113
 2021-Dec-04 00:00 *m   68.86115  57.68839 0.03909353786172      3.417        0.82        2.97       0.000100
 2021-Dec-05 00:00 *m   74.36097  60.70109 0.03632458710430      3.694        0.99        3.62       0.000090
 2021-Dec-06 00:00 *m   82.07879  63.81700 0.03378302761881      3.981        1.20        4.35       0.000090
 2021-Dec-07 00:00 *m   93.12340  66.74050 0.03151665470560      4.259        1.41        5.13       0.000107
 2021-Dec-08 00:00 *m  108.62545  68.86965 0.02958195934762      4.499        1.62        5.89       0.000143
 2021-Dec-09 00:00 *m  128.17224  69.28735 0.02804142940038      4.662        1.79        6.52       0.000192
 2021-Dec-10 00:00 *m  148.13964  67.26369 0.02695717289045      4.704        1.89        6.87       0.000249
 2021-Dec-11 00:00 *m  164.47975  62.93766 0.02638072331902      4.594        1.87        6.81       0.000310
 2021-Dec-12 00:00 *m  176.26841  57.10483 0.02634143884750      4.331        1.74        6.33       0.000370
 2021-Dec-13 00:00 *m  184.52366  50.59905 0.02683842060817      3.949        1.51        5.51       0.000424
 2021-Dec-14 00:00 *m  190.40441  44.04057 0.02784036282611      3.507        1.25        4.53       0.000470
 2021-Dec-15 00:00 *m  194.72710  37.82090 0.02929343666620      3.061        0.98        3.57       0.000507
 2021-Dec-16 00:00 *m  198.00958  32.14521 0.03113289695371      2.652        0.76        2.75       0.000536
 2021-Dec-17 00:00 *m  200.57727  27.08676 0.03329341955103      2.299        0.57        2.09       0.000558
 2021-Dec-18 00:00 *m  202.63899  22.63794 0.03571563765447      2.005        0.44        1.59       0.000574
 2021-Dec-19 00:00 *   204.33261  18.74945 0.03834894904566      1.764        0.34        1.23       0.000586
 2021-Dec-20 00:00 *   205.75194  15.35566 0.04115183238943      1.567        0.27        0.97       0.000595
 2021-Dec-21 00:00 *   206.96258  12.38891 0.04409091270376      1.405        0.22        0.79       0.000602
 2021-Dec-22 00:00 *   208.01158   9.78643 0.04713960004932      1.271        0.18        0.65       0.000608
 2021-Dec-23 00:00 *   208.93340   7.49307 0.05027673073977      1.158        0.15        0.56       0.000612
 2021-Dec-24 00:00 *   209.75381   5.46171 0.05348538688579      1.061        0.13        0.48       0.000616
 2021-Dec-25 00:00 *   210.49240   3.65273 0.05675193802407      0.977        0.12        0.43       0.000620
 2021-Dec-26 00:00 *   211.16426   2.03309 0.06006529109946      0.904        0.11        0.38       0.000623
 2021-Dec-27 00:00 *   211.78118   0.57531 0.06341631601344      0.838        0.10        0.35       0.000625
 2021-Dec-28 00:00 *   212.35249  -0.74349 0.06679741202030      0.780        0.09        0.32       0.000628
 2021-Dec-29 00:00 *   212.88560  -1.94236 0.07020218441371      0.727        0.08        0.29       0.000630
 2021-Dec-30 00:00 *   213.38648  -3.03723 0.07362520592391      0.679        0.08        0.27       0.000632
 2021-Dec-31 00:00 *   213.85996  -4.04147 0.07706184078452      0.635        0.07        0.26       0.000635
 2022-Jan-01 00:00 *   214.30998  -4.96636 0.08050811120746      0.594        0.07        0.24       0.000637


2008 UZ94 JPL/Horizons solution 42, # obs: 172 (2008-2021) 2021 August 27 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_S_3sig DOP_X_3sig RT_delay_3sig 2021-Nov-25 00:00 * 289.88949 25.00351 0.13150291623497 2.358 1.04 3.77 0.002267 2021-Nov-26 00:00 * 291.51469 22.99105 0.12122585441696 2.499 1.15 4.19 0.002296 2021-Nov-27 00:00 * 293.35815 20.57686 0.11119912084045 2.652 1.28 4.64 0.002327 2021-Nov-28 00:00 * 295.46743 17.65508 0.10150762730578 2.819 1.41 5.11 0.002358 2021-Nov-29 00:00 * 297.90305 14.09082 0.09226686523559 3.010 1.54 5.60 0.002387 2021-Nov-30 00:00 * 300.74234 9.71865 0.08363502816967 3.248 1.71 6.22 0.002409 2021-Dec-01 00:00 * 304.08386 4.35292 0.07582758919846 3.582 2.05 7.47 0.002414 2021-Dec-02 00:00 * 308.05201 -2.17386 0.06912990337229 4.096 2.85 10.35 0.002388 2021-Dec-03 00:00 * 312.79959 -9.92241 0.06389524017749 4.867 4.32 15.69 0.002310 2021-Dec-04 00:00 *m 318.50358 -18.70532 0.06050539719908 5.866 6.33 23.01 0.002161 2021-Dec-05 00:00 *m 325.34415 -27.96922 0.05927603672094 6.879 8.29 30.14 0.001936 2021-Dec-06 00:00 *m 333.45147 -36.86191 0.06033530554755 7.601 9.45 34.35 0.001654 2021-Dec-07 00:00 *m 342.81005 -44.53895 0.06356289950893 7.855 9.48 34.44 0.001357
Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination: 2003 SD220 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2021-Oct-31 00:00 177.77267 64.10571 0.14078659006226 16.491 4.950 83.3291 /L 50.9/ 28.7324 2021-Nov-02 00:00 178.73888 64.66320 0.13649030058381 16.387 4.932 84.6493 /L 60.7/ 11.4821 2021-Nov-04 00:00 179.82051 65.24868 0.13204615869647 16.279 4.915 85.9448 /L 76.9/ 1.2160 2021-Nov-06 00:00 181.03044 65.86866 0.12746374186813 16.168 4.898 87.2163 /L 95.5/ 1.8672 2021-Nov-08 00:00 182.38665 66.52921 0.12275411651048 16.053 4.882 88.4634 /L 112.4/ 13.8587 2021-Nov-10 00:00 183.91509 67.23606 0.11792892913847 15.934 4.866 89.6841 /L 123.3/ 33.3965 2021-Nov-12 00:00 185.65285 67.99494 0.11299974986535 15.811 4.850 90.8752 /L 125.0/ 55.1708 2021-Nov-14 00:00 187.65195 68.81168 0.10797809294229 15.683 4.835 92.0319 /L 118.4/ 74.8893 2021-Nov-16 00:00 189.98501 69.69204 0.10287587393927 15.550 4.821 93.1486 /L 107.1/ 89.7939 2021-Nov-18 00:00 192.75423 70.64084 0.09770598332121 15.412 4.807 94.2177 /L 94.1/ 98.2842 2021-Nov-20 00:00 196.10564 71.66027 0.09248289604592 15.268 4.793 95.2300 /L 81.7/ 99.6517 2021-Nov-22 00:00 200.25120 72.74641 0.08722336165135 15.119 4.781 96.1730 /L 71.7/ 93.9935 2021-Nov-24 00:00 205.50139 73.88257 0.08194722987035 14.963 4.770 97.0307 /L 65.7/ 82.0851 2021-Nov-26 00:00 212.30610 75.02635 0.07667847735115 14.803 4.760 97.7818 /L 65.3/ 65.2034 2021-Nov-28 00:00 221.27658 76.08575 0.07144654647076 14.637 4.752 98.3975 /L 70.6/ 45.1446 2021-Nov-30 00:00 233.07963 76.88074 0.06628814386360 14.467 4.748 98.8391 /L 80.1/ 24.6511 2021-Dec-02 00:00 247.95693 77.10441 0.06124960647587 14.295 4.746 99.0544 /L 90.9/ 7.9559 2021-Dec-04 00:00 264.84476 76.34719 0.05638981160175 14.125 4.750 98.9726 /T 99.1/ 0.1617 2021-Dec-06 00:00 281.29682 74.24599 0.05178356459493 13.961 4.761 98.4999 /T 100.6/ 4.3407 2021-Dec-08 00:00 295.18671 70.62732 0.04752560435910 13.814 4.781 97.5164 /T 94.4/ 18.8880 2021-Dec-10 00:00 305.94632 65.47261 0.04373492162657 13.695 4.813 95.8820 /T 83.8/ 38.9237 2021-Dec-12 00:00 314.03456 58.82866 0.04055668368831 13.623 4.860 93.4613 /T 73.5/ 59.6460 2021-Dec-14 00:00 320.12752 50.81448 0.03815571830423 13.617 4.927 90.1752 /T 68.8/ 77.7817 2021-Dec-16 00:00 324.78620 41.69928 0.03669446165689 13.697 5.014 86.0733 /T 73.8/ 91.2726 2021-Dec-18 00:00 328.41103 31.95382 0.03629457505750 13.875 5.119 81.3833 /T 88.3/ 98.7433 2021-Dec-20 00:00 331.27605 22.18741 0.03699725512644 14.145 5.238 76.4710 /T 109.1/ 99.3501 2021-Dec-22 00:00 333.56825 12.97670 0.03874842398603 14.485 5.364 71.7098 /T 133.1/ 92.8881 2021-Dec-24 00:00 335.41680 4.70706 0.04142049382237 14.868 5.491 67.3536 /T 156.7/ 79.8873 2021-Dec-26 00:00 336.91243 -2.46981 0.04485382500065 15.267 5.611 63.5000 /T 162.4/ 61.6410 2021-Dec-28 00:00 338.12000 -8.57800 0.04889244730237 15.665 5.725 60.1321 /T 138.7/ 40.3806 2021-Dec-30 00:00 339.08641 -13.73343 0.05340280906793 16. 6. 57.1789 /T 109.7/ 19.7218 2022-Jan-01 00:00 339.84552 -18.08112 0.05827861403009 16. 6. 54.5569 /T 79.0/ 4.7342 2022-Jan-03 00:00 340.42115 -21.76153 0.06343900182430 17. 6. 52.1901 /T 48.2/ 0.1796 2022-Jan-05 00:00 340.82948 -24.89658 0.06882520287257 17. 6. 50.0167 /T 20.0/ 7.2985 2022-Jan-07 00:00 341.08174 -27.58594 0.07439718098094 17. 6. 47.9899 /T 17.4/ 22.9925 Nereus Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2021-Oct-23 00:00 45.59602 24.87654 0.23251911744560 16.485 2.655 158.3613 /L 9.826/ 94.8626 2021-Oct-25 00:00 45.83412 25.33891 0.22022310981799 16.315 2.606 159.7639 /L 29.7/ 83.5882 2021-Oct-27 00:00 46.05763 25.82416 0.20827967657244 16.142 2.556 161.1152 /L 52.4/ 67.5496 2021-Oct-29 00:00 46.26834 26.33559 0.19668328000111 15.966 2.507 162.3953 /L 75.9/ 48.5180 2021-Oct-31 00:00 46.46873 26.87710 0.18542819150948 15.788 2.459 163.5787 /L 100.6/ 28.7324 2021-Nov-02 00:00 46.66222 27.45338 0.17450843590884 15.609 2.414 164.6331 /L 126.9/ 11.4821 2021-Nov-04 00:00 46.85360 28.07016 0.16391752030377 15.430 2.372 165.5200 /L 153.9/ 1.2160 2021-Nov-06 00:00 47.04941 28.73463 0.15364770898487 15.253 2.336 166.1956 /L 167.1/ 1.8672 2021-Nov-08 00:00 47.25818 29.45577 0.14368910348065 15.078 2.307 166.6167 /L 142.8/ 13.8587 2021-Nov-10 00:00 47.49036 30.24476 0.13402944318803 14.907 2.288 166.7479 /L 115.5/ 33.3965 2021-Nov-12 00:00 47.75844 31.11541 0.12465505757023 14.741 2.278 166.5703 /L 89.4/ 55.1708 2021-Nov-14 00:00 48.07762 32.08491 0.11555227319513 14.577 2.278 166.0851 /T 64.9/ 74.8893 2021-Nov-16 00:00 48.46689 33.17491 0.10670858462024 14.415 2.287 165.3103 /T 42.2/ 89.7939 2021-Nov-18 00:00 48.95090 34.41310 0.09811358387334 14.252 2.304 164.2723 /T 22.9/ 98.2842 2021-Nov-20 00:00 49.56300 35.83547 0.08975992713024 14.085 2.328 162.9959 /T 18.5/ 99.6517 2021-Nov-22 00:00 50.35022 37.48946 0.08164458404361 13.913 2.357 161.4954 /T 33.9/ 93.9935 2021-Nov-24 00:00 51.38214 39.43856 0.07377063100764 13.732 2.391 159.7663 /T 53.8/ 82.0851 2021-Nov-26 00:00 52.76714 41.76861 0.06615002645699 13.542 2.431 157.7757 /T 74.6/ 65.2034 2021-Nov-28 00:00 54.68458 44.59601 0.05880813316211 13.343 2.478 155.4486 /T 95.6/ 45.1446 2021-Nov-30 00:00 57.45390 48.07568 0.05179126716056 13.135 2.535 152.6444 /T 116.3/ 24.6511 2021-Dec-02 00:00 61.69804 52.39764 0.04517938456241 12.926 2.606 149.1208 /T 134.5/ 7.9559 2021-Dec-04 00:00 68.77317 57.72430 0.03910715263003 12.730 2.698 144.4853 /T 144.3/ 0.1617 2021-Dec-06 00:00 81.96785 63.86497 0.03379653584939 12.575 2.819 138.1660 /L 140.9/ 4.3407 2021-Dec-08 00:00 108.52782 68.94040 0.02959421996343 12.513 2.978 129.5199 /L 132.2/ 18.8880 2021-Dec-10 00:00 148.16018 67.35164 0.02696650862184 12.618 3.176 118.3187 /L 126.7/ 38.9237 2021-Dec-12 00:00 176.34301 57.18753 0.02634613553351 12.949 3.399 105.5615 /L 126.3/ 59.6460 2021-Dec-14 00:00 190.47426 44.11242 0.02783962210765 13.482 3.625 93.4308 /L 127.1/ 77.7817 2021-Dec-16 00:00 198.06763 32.20535 0.03112709133842 14.104 3.826 83.7161 /L 123.5/ 91.2726 2021-Dec-18 00:00 202.68716 22.68733 0.03570567045952 14.706 3.984 76.8141 /L 113.6/ 98.7433 2021-Dec-20 00:00 205.79255 15.39622 0.04113857343395 15.228 4.096 72.2503 /L 98.5/ 99.3501 2021-Dec-22 00:00 208.04640 9.82008 0.04712371236930 15.657 4.165 69.3860 /L 80.3/ 92.8881 2021-Dec-24 00:00 209.78411 5.49001 0.05346734209687 16.003 4.200 67.7018 /L 59.9/ 79.8873 2021-Dec-26 00:00 211.19094 2.05723 0.06004542267743 16.278 4.210 66.8323 /L 37.8/ 61.6410 2021-Dec-28 00:00 212.37624 -0.72264 0.06677596032410 16.499 4.202 66.5315 /L 14.9/ 40.3806 2021-Dec-30 00:00 213.40778 -3.01901 0.07360234910674 16.676 4.181 66.6351 /L 16.0/ 19.7218 2008 UZ94 Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2021-Nov-16 00:00 280.77494 33.99184 0.22836604969462 17.499 n.a. 70.5881 /T 93.2/ 89.7939 2021-Nov-18 00:00 282.24890 32.82983 0.20664341195647 17.378 n.a. 69.8175 /T 104.1/ 98.2842 2021-Nov-20 00:00 283.96036 31.33192 0.18491931430200 17.244 n.a. 68.9400 /T 114.1/ 99.6517 2021-Nov-22 00:00 285.98850 29.36030 0.16331575717161 17.095 n.a. 67.9218 /T 122.2/ 93.9935 2021-Nov-24 00:00 288.44970 26.69882 0.14200763105550 16.928 n.a. 66.7218 /T 127.3/ 82.0851 2021-Nov-26 00:00 291.51976 22.99559 0.12126612724732 16.741 n.a. 65.3012 /T 127.9/ 65.2034 2021-Nov-28 00:00 295.47260 17.66254 0.10154714282158 16.530 n.a. 63.6643 /T 122.7/ 45.1446 2021-Nov-30 00:00 300.74706 9.73130 0.08367278891163 16.290 n.a. 62.0116 /T 110.7/ 24.6511 2021-Dec-02 00:00 308.05501 -2.15242 0.06916354366827 15.996 n.a. 61.1880 /T 91.8/ 7.9559 2021-Dec-04 00:00 318.50207 -18.67273 0.06053044852028 15.610 n.a. 63.2421 /T 67.8/ 0.1617 2021-Dec-06 00:00 333.44047 -36.82414 0.06034741732355 15.225 n.a. 69.6033 /T 47.1/ 4.3407 2021-Dec-08 00:00 353.12202 -50.45755 0.06864585631093 15.073 n.a. 77.6526 /T 42.5/ 18.8880 2021-Dec-10 00:00 14.31728 -57.19700 0.08286242170446 15.162 n.a. 84.3207 /T 50.3/ 38.9237 2021-Dec-12 00:00 32.19012 -59.19224 0.10045343330116 15.367 n.a. 89.0870 /T 59.9/ 59.6460 2021-Dec-14 00:00 45.10978 -59.03846 0.11987721430178 15.605 n.a. 92.4451 /T 68.1/ 77.7817 2021-Dec-16 00:00 54.06648 -58.14289 0.14030923191675 15.842 n.a. 94.8821 /T 75.0/ 91.2726 2021-Dec-18 00:00 60.37621 -57.06781 0.16130334381571 16.066 n.a. 96.7209 /T 81.1/ 98.7433 2021-Dec-20 00:00 64.97293 -56.00731 0.18260557303116 16.274 n.a. 98.1613 /T 86.9/ 99.3501 2021-Dec-22 00:00 68.44097 -55.01768 0.20406326883450 16.466 n.a. 99.3277 /T 92.6/ 92.8881

Setups



2003 SD220
This object is going to have a narrow bandwidth due to its extremely slow rotation.  
The bandwidth will barely change during individual tracks but could vary by more than 
a factor of two over several days due to the elongated shape and if this asteroid is
in a non-principal axis spin state, which seems likely. 


CW setup for 2003 SD220
TX polarization           RCP
RCV polarization          LCP & RCP
Frequency hops:           no hopping
Bandwidth:               5000 Hz 
TXoffset                  +500 Hz
FFT                      50000 for 0.1 Hz resolution 


Ranging setups:
---------------------------------------------------------------------------
10-usec
baud             10 usec
code            127
PRP            1270 usec
FFT             128   
ncoh              1 
bandwidth       787 Hz   
resolution      12.3 Hz
TXOFF          +100Hz  (echo in bin 32 + 8 = 40)
---------------------------------------------------------------------------
11-usec 
baud             11 usec
code            127
PRP            1397 usec
FFT              64  
ncoh              1 
bandwidth       716 Hz   
resolution      11.2 Hz
TXOFF          +100 Hz  (echo in bin 32 + 9= 41) 
-------------------------------------------------------------------------
1-usec 
baud            1 usec
code            255
FFT             512
ncoh             16
bandwidth        245 Hz   
resolution       0.48 Hz
TXOFF           +50 Hz 
---------------------------------------------------------------------

Instructions

NOTE: Data should be moved to the appropriate subdirectories in aardvark:/export/data0/a163899/raw/

POINTING:

  OSOD and predicts will be on aardvark:

...not available yet...


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

... to be added ...

Transmit offsets are given in millidegrees.  


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

2003 SD220 GOLDSTONE MASTERLOG

============================================================================== Receive TX Setup hops dwell code ncoh FFT runs start -stop OSOD offset Poln Notes ------------------------------------------------------------------------------
Dr. Lance A. M. Benner | PHONE: (818) 354-7412 Mail Stop 183-601 | FAX: (818) 393-4445 Jet Propulsion Laboratory | email: lance.benner@jpl.nasa.gov California Institute of Technology | Plan: To live long and prosper Pasadena, CA 91109-8099 http://echo.jpl.nasa.gov/asteroids/2003SD220/2003SD220_planning.2021.html

Asteroid Radar Astronomy
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