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
2022-09-06 18:01:03 C 21 53 30.76 +03 40 07.5 V C40
2022-09-06 18:01:46 C 21 53 30.62 +03 40 04.7 V C40
2022-09-06 18:05:11 C 21 53 29.99 +03 39 51.1 V C40
2022-09-06 18:06:33 C 21 53 29.74 +03 39 45.7 V C40
2022-09-06 18:09:58 C 21 53 29.11 +03 39 32.1 V C40
2022-09-06 18:11:20 C 21 53 28.85 +03 39 26.6 V C40
2022-09-06 18:12:42 C 21 53 28.59 +03 39 21.2 V C40
2022-09-06 18:13:24 C 21 53 28.47 +03 39 18.4 V C40
2022-09-06 18:14:04 C 21 53 28.34 +03 39 15.7 V C40
2022-09-06 18:15:27 C 21 53 28.09 +03 39 10.4 V C40
2022-09-06 18:16:09 C 21 53 27.96 +03 39 07.6 V C40
2022-09-06 18:16:50 C 21 53 27.83 +03 39 04.8 V C40
2022-09-06 18:18:52 C 21 53 27.45 +03 38 56.7 V C40
2022-09-06 18:19:34 C 21 53 27.32 +03 38 53.9 V C40
2022-09-06 18:21:36 C 21 53 26.95 +03 38 45.9 V C40
2022-09-06 18:39:55 C 21 53 23.54 +03 37 33.1 V C40
2022-09-06 18:40:38 C 21 53 23.41 +03 37 30.2 V C40
2022-09-06 18:42:00 C 21 53 23.15 +03 37 24.8 V C40
2022-09-06 18:48:10 C 21 53 22.01 +03 37 00.4 V C40
2022-09-06 18:48:50 C 21 53 21.88 +03 36 57.7 V C40
2022-09-06 18:49:32 C 21 53 21.75 +03 36 54.9 V C40
2022-09-06 18:52:16 C 21 53 21.24 +03 36 44.0 V C40
2022-09-06 18:56:23 C 21 53 20.48 +03 36 27.7 V C40
2022-09-06 19:03:13 C 21 53 19.21 +03 36 00.5 V C40
2022-09-06 19:12:07 C 21 53 17.55 +03 35 25.1 V C40
2022-09-06 19:15:33 C 21 53 16.91 +03 35 11.4 V C40
2022-09-06 20:24:34 C 21 53 04.841 +03 31 33.74 V M22
2022-09-06 20:29:49 C 21 53 03.852 +03 31 12.94 V M22
2022-09-06 20:39:44 C 21 53 01.994 +03 30 33.44 V M22
2022-09-06 20:47:33 C 21 53 00.523 +03 30 02.52 V M22
2022-09-06 21:30:06 C 21 52 52.74 +03 26 14.0 Y 557
2022-09-06 22:28:49 C 21 52 41.89 +03 22 21.1 Y 557
2022-09-06 23:30:40 C 21 52 30.48 +03 18 15.7 Y 557
2022-09-07 00:30:16 C 21 52 19.55 +03 14 19.0 Y 557
2022-09-07 01:22:42 C 21 52 10.02 +03 10 51.0 Y 557
2022-09-07 02:41:54 C 21 51 58.07 +03 05 38.8 q X04
2022-09-07 03:11:31 C 21 51 52.59 +03 03 42.0 q X04
2022-09-07 03:42:22 C 21 51 46.94 +03 01 39.8 q X04
2022-09-07 10:59:07 V 21 50 32.60 +02 33 03.8 V 270
2022-09-07 10:59:07 v 1 134.35900 +35.08986 270
2022-09-07 11:31:14 V 21 50 27.35 +02 31 09.9 V 270
2022-09-07 11:31:14 v 1 134.35900 +35.08986 270
2022-09-07 12:07:07 V 21 50 20.24 +02 28 36.8 V 270
2022-09-07 12:07:07 v 1 134.35900 +35.08986 270
2022-09-07 12:55:26 V 21 50 11.39 +02 25 27.3 V 270
2022-09-07 12:55:26 v 1 134.35900 +35.08986 270
2022-09-07 18:27:48 C 21 49 14.49 +02 03 37.6 V C40
2022-09-07 19:08:12 C 21 49 07.21 +02 00 59.7 V C40
2022-09-07 19:49:49 C 21 48 59.70 +01 58 16.9 V C40
2022-09-08 17:26:05 C 21 45 22.32 +00 34 33.2 V C40
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)