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
2022-08-10 22:27:55 v 1 359.09514 +47.06730 270
2022-08-10 23:07:22 V 00 00 33.81 +36 56 31.5 V 270
2022-08-10 23:07:22 v 1 359.09514 +47.06730 270
2022-08-10 23:45:05 V 00 00 27.39 +36 55 36.1 V 270
2022-08-10 23:45:05 v 1 359.09514 +47.06730 270
2022-08-11 00:04:32 C 00 00 23.74 +36 55 05.3 V L65
2022-08-11 00:32:04 C 00 00 19.07 +36 54 24.4 V L65
2022-08-11 00:58:31 C 00 00 14.58 +36 53 44.9 V L65
2022-08-12 00:04:28 C 23 56 26.60 +36 17 32.6 V L65
2022-08-12 00:34:11 C 23 56 21.41 +36 16 45.1 V L65
2022-08-12 00:57:59 C 23 56 17.24 +36 16 07.1 V L65
2022-08-12 12:20:59 C 23 54 21.955 +35 57 44.28 V T08
2022-08-12 12:23:37 C 23 54 21.470 +35 57 39.82 V T08
2022-08-12 12:27:36 C 23 54 20.734 +35 57 33.26 V T08
2022-08-12 12:35:28 C 23 54 19.303 +35 57 20.16 V T08
2022-08-12 20:50:34 C 23 52 55.69 +35 42 49.0 c M31
2022-08-12 21:03:00 C 23 52 53.52 +35 42 28.3 c M31
2022-08-12 21:17:07 C 23 52 51.77 +35 42 05.9 V G33
2022-08-12 21:18:48 C 23 52 51.49 +35 42 03.2 V G33
2022-08-12 21:20:29 C 23 52 51.19 +35 42 00.4 V G33
2022-08-12 21:22:10 C 23 52 50.88 +35 41 57.6 V G33
2022-08-12 21:23:51 C 23 52 50.59 +35 41 54.9 V G33
2022-08-12 21:25:32 C 23 52 50.31 +35 41 52.0 V G33
2022-08-12 22:53:37 C 23 52 34.761 +35 39 25.78 X B72
2022-08-12 22:54:49 C 23 52 34.559 +35 39 23.63 X B72
2022-08-12 22:56:00 C 23 52 34.342 +35 39 21.51 X B72
2022-08-12 22:57:11 C 23 52 34.123 +35 39 19.53 X B72
2022-08-12 22:58:21 C 23 52 33.914 +35 39 17.55 X B72
2022-08-12 22:59:32 C 23 52 33.700 +35 39 15.46 X B72
2022-08-12 23:00:44 C 23 52 33.491 +35 39 13.57 X B72
2022-08-12 23:01:55 C 23 52 33.269 +35 39 11.53 X B72
2022-08-12 23:03:06 C 23 52 33.071 +35 39 09.49 X B72
2022-08-12 23:04:17 C 23 52 32.842 +35 39 07.51 X B72
2022-08-12 23:05:28 C 23 52 32.636 +35 39 05.47 X B72
2022-08-12 23:34:36 C 23 52 27.35 +35 38 15.4 V L65
2022-08-13 00:17:32 C 23 52 19.64 +35 37 02.3 V L65
2022-08-13 00:58:01 C 23 52 12.33 +35 35 53.1 V L65
2022-08-13 11:18:21 C 23 50 25.258 +35 18 04.25 V T08
2022-08-13 11:23:21 C 23 50 24.322 +35 17 55.57 V T08
2022-08-13 11:27:57 C 23 50 23.455 +35 17 47.33 V T08
2022-08-13 11:46:34 C 23 50 19.975 +35 17 14.75 V T08
2022-08-13 20:18:57 C 23 48 51.16 +35 01 16.6 V C23
2022-08-13 20:24:10 C 23 48 50.24 +35 01 07.1 V C23
2022-08-13 20:28:39 C 23 48 49.41 +35 00 59.4 V C23
2022-08-13 21:13:02 C 23 48 41.42 +34 59 41.3 V G33
2022-08-13 21:14:43 C 23 48 41.10 +34 59 38.3 V G33
2022-08-13 21:16:24 C 23 48 40.82 +34 59 35.5 V G33
2022-08-13 21:18:10 C 23 48 40.50 +34 59 32.1 V G33
2022-08-13 21:19:46 C 23 48 40.20 +34 59 29.2 V G33
2022-08-13 21:21:27 C 23 48 39.92 +34 59 26.5 V G33
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)