2100 Ra-Shalom (1978 RA)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4364955679 ± 2.00e+00
Semi-major axis (a)0.8320181223 AU ± 3.00e+00
Inclination (i)15.75890506° ± 4.00e+00
Long. of Asc. Node (Ω)170.76329799° ± 5.00e+00
Arg. of Perihelion (ω)356.08164717° ± 6.00e+00
Mean Anomaly (M)249.10870172° ± 4.17e-06
Mean Motion (n)1.2987127297°/day ± 7.02e+00
Perihelion dist (q)0.46884590 AU ± 2.37e+00
Aphelion dist (Q)1.19519035 AU ± 4.62e+00
Orbital Period0.75892556 yr ± 4.10e+00
NGA Modelr2
A2-1.01979994e-06 AU/d²
Physical Parameters
H (abs. magnitude)16.24
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-26
RMS Residual0.161″
Uncertainty0
Orbit TypeAten
MOID0.149239 AU
Observations Used5029
Radar Obs Used6
Gaia Obs Used44
Oppositions13
Arc Total1975-2026
First Observation Used1975-10-03
Last Observation Used2026-01-06
Observations (5346)
Date Type RA Dec Mag Band Observatory
1997-09-25 06:24:30 C 00 27 54.90 -19 56 00.0 z 712
1997-09-25 08:40:56 C 00 27 23.09 -20 06 26.3 z 758
1997-09-25 08:45:17 C 00 27 22.12 -20 06 46.4 z 758
1997-09-25 08:50:09 C 00 27 21.05 -20 07 08.7 z 758
1997-09-26 01:07:51 C 00 23 52.37 -21 23 06.3 z 046
1997-09-26 01:09:36 C 00 23 51.97 -21 23 14.2 z 046
1997-09-26 01:11:02 C 00 23 51.66 -21 23 20.0 z 046
1997-09-28 11:16:22 C 00 10 48.76 -25 48 04.4 c 608
1997-09-28 11:25:12 C 00 10 46.59 -25 48 44.2 c 608
1997-09-28 22:43:51 C 00 08 10.10 -26 39 08.3 13.8 z 627
1997-09-28 22:48:20 C 00 08 08.97 -26 39 27.8 14.0 z 627
1997-09-28 22:53:20 C 00 08 07.72 -26 39 50.0 14.0 z 627
1997-09-28 22:58:21 C 00 08 06.52 -26 40 12.1 13.9 z 627
1997-09-28 23:03:21 C 00 08 05.28 -26 40 34.1 14.0 z 627
1997-09-29 11:18:38 C 00 05 10.37 -27 34 07.5 c 608
1997-09-29 11:28:03 C 00 05 08.08 -27 34 48.4 c 608
1997-09-30 11:08:32 C 23 59 31.08 -29 15 44.9 14.4 z 422
1997-09-30 11:12:25 C 23 59 30.08 -29 16 01.7 14.4 z 422
1997-09-30 11:17:38 C 23 59 25.65 -29 17 05.1 c 608
1997-09-30 11:35:28 C 23 59 21.09 -29 18 19.2 c 608
1997-10-10 17:23:53 C 22 57 44.51 -43 04 48.9 z 422
1997-10-10 17:25:06 C 22 57 44.19 -43 04 52.2 z 422
1997-10-10 17:26:19 C 22 57 43.91 -43 04 54.9 z 422
1997-10-18 04:17:17 C 22 16 32.82 -48 44 49.8 z 861
1997-10-18 04:22:26 C 22 16 31.72 -48 44 56.4 z 861
1997-10-18 04:41:21 C 22 16 27.62 -48 45 21.3 z 861
1997-10-23 13:01:16 C 21 51 19.45 -51 14 32.7 16.5 z 427
1997-10-23 13:58:25 C 21 51 08.48 -51 15 22.3 16.8 z 427
1997-10-23 14:06:57 C 21 51 06.91 -51 15 29.8 16.5 z 427
1997-10-23 14:10:52 C 21 51 06.20 -51 15 33.2 16.5 z 427
1997-10-23 14:30:55 C 21 51 02.37 -51 15 50.1 16.9 z 427
1997-10-23 14:35:26 C 21 51 01.49 -51 15 54.2 16.9 z 427
1997-10-23 14:40:21 C 21 51 00.63 -51 15 58.3 16.8 z 427
1997-10-23 15:00:26 C 21 50 56.95 -51 16 15.3 16.6 z 427
1997-10-23 15:07:24 C 21 50 55.61 -51 16 21.0 16.5 z 427
1997-10-23 15:16:05 C 21 50 54.00 -51 16 28.7 16.5 z 427
1997-10-24 14:56:11 C 21 46 41.47 -51 37 49.3 16.2 z 427
1997-10-24 15:00:06 C 21 46 40.85 -51 37 52.9 16.4 z 427
1997-10-24 15:11:06 C 21 46 38.79 -51 38 01.2 15.4 z 427
1997-10-24 15:20:05 C 21 46 37.20 -51 38 07.3 16.4 z 427
1997-10-24 15:28:05 C 21 46 35.81 -51 38 13.7 16.3 z 427
1997-10-29 10:48:48 C 21 27 49.60 -53 02 58.9 426
1997-10-29 11:00:27 C 21 27 47.70 -53 03 05.9 426
1997-10-29 11:13:15 C 21 27 45.54 -53 03 13.3 426
1997-10-31 10:52:32 C 21 20 42.63 -53 30 45.9 426
1997-10-31 11:01:18 C 21 20 41.25 -53 30 50.4 426
1997-10-31 11:08:51 C 21 20 40.08 -53 30 53.9 426
1997-11-11 11:08:43 C 20 45 45.03 -55 17 58.2 426
1997-11-11 11:15:46 C 20 45 44.03 -55 17 59.2 426
1997-11-11 11:23:32 C 20 45 42.96 -55 18 01.2 426
Radar Observations (17)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1981-08-25 02:00:00 -18021.4 1 Hz 2380 -1 -1
1981-08-25.083333 -1802140 20 Hz 2380 251 251
1984-08-21 00:00:00 -98092 1 Hz 2380 -1 -1
1984-08-21.000000 -9809200 100 Hz 2380 251 251
2000-08-27 06:00:00 202910964 10 us 2380 -1 -1
2000-08-27.250000 20291096400 10000 us 2380 251 251
2000-08-30 05:00:00 196039017 10 us 2380 -1 -1
2000-08-30.208333 19603901700 10000 us 2380 251 251
2003-08-22 02:10:35 176875273 1.5 us 2380 -1 -1
2003-08-22 02:15:00 176879019.6 0.5 us 2380 -1 -1
2003-08-22.090683 17687527300 1500 us 2380 251 251
2003-08-22.093750 17687901960 500 us 2380 251 251
2016-09-26 08:40:00 178120943.18 10 us 8560 -14 -14
2016-09-27 07:50:00 174259621.3 3 us 8560 -14 -14
2016-09-30 08:50:00 163725075.83 5 us 8560 -14 -14
2019-09-08 06:54:00 206862668.32 6 us 2380 -1 -1
2022-09-03 05:30:00 187861848.74 2 us 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)