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
2022-09-04 19:43:14 C 22 01 57.46 +06 46 28.8 V C40
2022-09-04 19:43:56 C 22 01 57.33 +06 46 26.1 V C40
2022-09-04 19:49:24 C 22 01 56.25 +06 46 03.8 V C40
2022-09-04 19:50:06 C 22 01 56.12 +06 46 01.0 V C40
2022-09-04 19:50:46 C 22 01 55.98 +06 45 58.3 V C40
2022-09-04 19:52:08 C 22 01 55.71 +06 45 52.8 V C40
2022-09-04 19:52:50 C 22 01 55.58 +06 45 50.0 V C40
2022-09-04 19:53:30 C 22 01 55.44 +06 45 47.1 V C40
2022-09-04 19:53:50 V 22 01 56.46 +06 45 43.5 V 270
2022-09-04 19:53:50 v 1 004.83137 +47.04037 270
2022-09-04 19:54:53 C 22 01 55.17 +06 45 41.5 V C40
2022-09-04 19:58:18 C 22 01 54.50 +06 45 27.7 V C40
2022-09-04 20:03:10 V 22 01 54.55 +06 45 04.5 V 270
2022-09-04 20:03:10 v 1 006.13170 +48.70661 270
2022-09-04 20:14:03 C 22 01 51.39 +06 44 23.7 V C40
2022-09-04 20:16:08 C 22 01 50.98 +06 44 15.4 V C40
2022-09-04 20:17:30 C 22 01 50.71 +06 44 09.8 V C40
2022-09-04 20:18:52 C 22 01 50.44 +06 44 04.2 V C40
2022-09-04 20:19:30 V 22 01 51.48 +06 44 00.1 V 270
2022-09-04 20:19:30 v 1 004.83137 +47.04037 270
2022-09-04 20:19:33 C 22 01 50.31 +06 44 01.5 V C40
2022-09-04 20:27:46 C 22 01 48.69 +06 43 28.1 V C40
2022-09-04 20:36:41 C 22 01 46.94 +06 42 52.0 V C40
2022-09-04 20:46:31 V 22 01 46.01 +06 42 08.5 V 270
2022-09-04 20:46:31 v 1 006.13170 +48.70661 270
2022-09-04 20:54:45 V 22 01 44.60 +06 41 37.1 V 270
2022-09-04 20:54:45 v 1 004.83137 +47.04037 270
2022-09-04 21:15:38 C 22 01 39.96 +06 40 12.4 V K88
2022-09-04 21:16:00 C 22 01 39.89 +06 40 10.8 V K88
2022-09-04 21:16:23 C 22 01 39.82 +06 40 09.5 V K88
2022-09-04 21:16:45 C 22 01 39.74 +06 40 07.8 V K88
2022-09-04 21:20:18 V 22 01 39.57 +06 39 53.5 V 270
2022-09-04 21:20:18 v 1 004.83137 +47.04037 270
2022-09-04 21:30:17 V 22 01 37.52 +06 39 11.7 V 270
2022-09-04 21:30:17 v 1 006.13170 +48.70661 270
2022-09-04 21:33:21 C 22 01 36.82 +06 38 57.0 V L65
2022-09-04 22:18:16 C 22 01 28.05 +06 35 54.6 V L65
2022-09-04 23:14:49 C 22 01 17.00 +06 32 05.2 V L65
2022-09-05 02:42:00 C 22 00 39.456 +06 19 06.06 V W68
2022-09-05 02:44:36 C 22 00 38.942 +06 18 55.48 V W68
2022-09-05 02:49:08 C 22 00 38.042 +06 18 37.12 V W68
2022-09-05 03:19:16 C 22 00 32.093 +06 16 35.18 V W68
2022-09-05 12:34:13 C 21 58 50.63 +05 38 21.6 V D29
2022-09-05 12:36:35 C 21 58 50.16 +05 38 11.7 V D29
2022-09-05 12:58:00 C 21 58 46.03 +05 36 45.7 V D29
2022-09-05 13:00:23 C 21 58 45.55 +05 36 35.9 V D29
2022-09-05 13:21:47 C 21 58 41.42 +05 35 09.9 V D29
2022-09-05 13:24:10 C 21 58 40.95 +05 35 00.1 V D29
2022-09-06 13:32:42 V 21 54 17.30 +03 58 03.0 V 270
2022-09-06 13:32:42 v 1 140.17427 +36.06256 270
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)