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
2022-08-07 01:03:39 V 00 14 48.03 +39 01 09.4 V 270
2022-08-07 01:03:39 v 1 012.49633 +52.59598 270
2022-08-07 01:24:06 V 00 14 44.97 +39 00 46.0 V 270
2022-08-07 01:24:06 v 1 012.49633 +52.59598 270
2022-08-07 01:46:32 V 00 14 41.63 +39 00 20.6 V 270
2022-08-07 01:46:32 v 1 012.49633 +52.59598 270
2022-08-07 02:04:00 C 00 14 39.13 +39 00 00.3 V L65
2022-08-07 02:18:18 V 00 14 36.86 +38 59 44.1 V 270
2022-08-07 02:18:18 v 1 012.49633 +52.59598 270
2022-08-07 02:29:52 C 00 14 35.27 +38 59 30.5 V L65
2022-08-07 02:58:26 C 00 14 30.97 +38 58 56.9 V L65
2022-08-07 20:50:28 C 00 11 59.04 +38 37 29.9 Y 557
2022-08-07 21:51:38 C 00 11 49.97 +38 36 18.6 Y 557
2022-08-07 22:51:35 C 00 11 40.94 +38 35 08.1 Y 557
2022-08-07 23:50:57 C 00 11 31.90 +38 33 57.6 Y 557
2022-08-08 00:24:13 C 00 11 26.97 +38 33 17.0 V 196
2022-08-08 00:45:36 C 00 11 23.68 +38 32 51.3 V 196
2022-08-08 00:52:06 C 00 11 22.49 +38 32 43.8 Y 557
2022-08-08 00:55:22 C 00 11 22.18 +38 32 39.5 V 196
2022-08-08 01:10:49 C 00 11 19.72 +38 32 18.6 V L65
2022-08-08 01:35:55 C 00 11 15.84 +38 31 47.9 V L65
2022-08-08 01:55:49 C 00 11 12.62 +38 31 25.6 Y 557
2022-08-08 01:59:30 C 00 11 12.20 +38 31 19.0 V L65
2022-08-08 23:11:46 C 00 08 03.86 +38 04 08.1 V C23
2022-08-08 23:17:09 C 00 08 03.01 +38 04 01.2 V C23
2022-08-08 23:21:27 C 00 08 02.33 +38 03 55.7 V C23
2022-08-09 01:04:38 C 00 07 45.85 +38 01 42.2 V L65
2022-08-09 01:32:26 C 00 07 41.41 +38 01 05.7 V L65
2022-08-09 01:59:13 C 00 07 37.13 +38 00 30.4 V L65
2022-08-10 00:04:43 C 00 04 13.31 +37 30 11.6 V L65
2022-08-10 00:16:35 C 00 04 11.53 +37 29 55.7 V C23
2022-08-10 00:21:03 C 00 04 10.80 +37 29 49.5 V C23
2022-08-10 00:26:15 C 00 04 09.95 +37 29 42.3 V C23
2022-08-10 00:31:46 C 00 04 08.87 +37 29 33.9 V L65
2022-08-10 00:58:49 C 00 04 04.44 +37 28 56.5 V L65
2022-08-10 20:31:17 C 00 00 59.18 +37 00 15.6 V C23
2022-08-10 20:36:29 C 00 00 58.36 +37 00 08.4 V C23
2022-08-10 20:40:58 C 00 00 57.63 +37 00 02.1 V C23
2022-08-10 21:20:33 C 00 00 51.216 +36 59 03.41 V Z37
2022-08-10 21:23:36 C 00 00 50.719 +36 58 58.66 V Z37
2022-08-10 21:26:40 C 00 00 50.239 +36 58 54.73 V Z37
2022-08-10 21:40:28 V 00 00 48.12 +36 58 37.5 V 270
2022-08-10 21:40:28 v 1 359.09514 +47.06730 270
2022-08-10 21:54:32 C 00 00 45.55 +36 58 16.2 V G33
2022-08-10 21:56:13 C 00 00 45.28 +36 58 13.7 V G33
2022-08-10 21:57:54 C 00 00 44.99 +36 58 11.5 V G33
2022-08-10 21:59:35 C 00 00 44.72 +36 58 08.9 V G33
2022-08-10 22:01:16 C 00 00 44.45 +36 58 06.5 V G33
2022-08-10 22:02:57 C 00 00 44.16 +36 58 04.2 V G33
2022-08-10 22:27:55 V 00 00 40.37 +36 57 29.6 V 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)