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
2022-08-28 11:05:17 C 22 37 42.458 +18 33 16.70 V T08
2022-08-28 11:24:47 V 22 37 41.01 +18 31 45.0 V 270
2022-08-28 11:24:47 v 1 134.35900 +35.08986 270
2022-08-28 11:56:13 C 22 37 30.958 +18 30 03.35 V T08
2022-08-28 12:05:55 V 22 37 31.59 +18 29 05.0 V 270
2022-08-28 12:05:55 v 1 134.35900 +35.08986 270
2022-08-28 12:48:26 V 22 37 23.00 +18 26 39.5 V 270
2022-08-28 12:48:26 v 1 134.35900 +35.08986 270
2022-08-28 13:30:19 V 22 37 13.21 +18 23 54.5 V 270
2022-08-28 13:30:19 v 1 134.35900 +35.08986 270
2022-08-28 15:26:41 V 22 36 46.89 +18 16 33.7 V 270
2022-08-28 15:26:41 v 1 140.17000 +36.06000 270
2022-08-28 15:53:41 V 22 36 40.85 +18 14 49.6 V 270
2022-08-28 15:53:41 v 1 140.17000 +36.06000 270
2022-08-28 16:25:49 V 22 36 33.65 +18 12 46.5 V 270
2022-08-28 16:25:49 v 1 140.17000 +36.06000 270
2022-08-28 17:08:10 V 22 36 24.33 +18 10 06.2 V 270
2022-08-28 17:08:10 v 1 140.17000 +36.06000 270
2022-08-28 17:55:48 C 22 36 16.65 +18 06 49.5 q 168
2022-08-28 19:33:59 V 22 35 56.77 +18 00 36.9 V 270
2022-08-28 19:33:59 v 1 004.03770 +48.95065 270
2022-08-28 19:59:08 V 22 35 51.32 +17 59 01.6 V 270
2022-08-28 19:59:08 v 1 004.03770 +48.95065 270
2022-08-28 20:29:45 V 22 35 44.66 +17 57 06.1 V 270
2022-08-28 20:29:45 v 1 004.03770 +48.95065 270
2022-08-28 20:37:58 C 22 35 41.04 +17 56 32.3 q 168
2022-08-28 20:44:19 C 22 35 41.15 +17 56 10.8 Y 557
2022-08-28 20:54:46 V 22 35 39.19 +17 55 30.8 V 270
2022-08-28 20:54:46 v 1 004.03770 +48.95065 270
2022-08-28 21:44:39 C 22 35 27.88 +17 52 21.5 Y 557
2022-08-28 22:44:56 C 22 35 14.56 +17 48 31.6 Y 557
2022-08-28 22:55:58 C 22 35 10.82 +17 47 42.7 q 168
2022-08-28 23:16:13 V 22 35 07.97 +17 46 36.1 V 270
2022-08-28 23:16:13 v 1 006.90666 +44.69672 270
2022-08-28 23:34:37 V 22 35 03.86 +17 45 25.3 V 270
2022-08-28 23:34:37 v 1 006.90666 +44.69672 270
2022-08-28 23:44:09 C 22 35 01.47 +17 44 44.8 Y 557
2022-08-28 23:54:13 V 22 34 59.62 +17 44 02.1 V 270
2022-08-28 23:54:13 v 1 006.90666 +44.69672 270
2022-08-29 00:15:56 V 22 34 54.66 +17 42 46.4 V 270
2022-08-29 00:15:56 v 1 006.90666 +44.69672 270
2022-08-29 03:59:11 V 22 34 10.05 +17 28 34.4 V 270
2022-08-29 03:59:11 v 1 248.27677 +33.41218 270
2022-08-29 04:25:00 V 22 34 04.41 +17 26 56.1 V 270
2022-08-29 04:25:00 v 1 248.27677 +33.41218 270
2022-08-29 04:54:01 V 22 33 58.01 +17 25 05.1 V 270
2022-08-29 04:54:01 v 1 248.27677 +33.41218 270
2022-08-29 05:19:26 V 22 33 52.33 +17 23 27.9 V 270
2022-08-29 05:19:26 v 1 248.27677 +33.41218 270
2022-08-29 08:40:39 C 22 33 09.696 +17 10 42.49 V T08
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)