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 13:56:44 V 21 54 12.77 +03 56 27.5 V 270
2022-09-06 13:56:44 v 1 140.17427 +36.06256 270
2022-09-06 14:24:41 V 21 54 07.48 +03 54 36.2 V 270
2022-09-06 14:24:41 v 1 140.17427 +36.06256 270
2022-09-06 14:54:28 V 21 54 01.85 +03 52 36.8 V 270
2022-09-06 14:54:28 v 1 140.17427 +36.06256 270
2022-09-06 16:11:50 C 21 53 49.898 +03 47 26.70 V N44
2022-09-06 16:12:20 C 21 53 49.807 +03 47 24.72 V N44
2022-09-06 16:12:50 C 21 53 49.709 +03 47 22.68 V N44
2022-09-06 16:13:20 C 21 53 49.613 +03 47 20.66 V N44
2022-09-06 16:13:50 C 21 53 49.527 +03 47 18.86 V N44
2022-09-06 16:14:20 C 21 53 49.426 +03 47 16.63 V N44
2022-09-06 16:14:50 C 21 53 49.328 +03 47 14.63 V N44
2022-09-06 16:15:20 C 21 53 49.241 +03 47 12.80 V N44
2022-09-06 16:15:50 C 21 53 49.150 +03 47 10.80 V N44
2022-09-06 16:16:20 C 21 53 49.056 +03 47 08.83 V N44
2022-09-06 16:16:50 C 21 53 48.955 +03 47 06.65 V N44
2022-09-06 16:17:20 C 21 53 48.870 +03 47 04.82 V N44
2022-09-06 16:17:50 C 21 53 48.769 +03 47 02.65 V N44
2022-09-06 16:18:20 C 21 53 48.678 +03 47 00.74 V N44
2022-09-06 16:18:50 C 21 53 48.582 +03 46 58.73 V N44
2022-09-06 16:19:20 C 21 53 48.491 +03 46 56.84 V N44
2022-09-06 16:20:50 C 21 53 48.211 +03 46 50.86 V N44
2022-09-06 16:21:20 C 21 53 48.118 +03 46 48.87 V N44
2022-09-06 16:21:50 C 21 53 48.019 +03 46 46.90 V N44
2022-09-06 16:22:20 C 21 53 47.924 +03 46 44.92 V N44
2022-09-06 16:22:50 C 21 53 47.831 +03 46 42.76 V N44
2022-09-06 16:23:20 C 21 53 47.744 +03 46 41.06 V N44
2022-09-06 16:23:50 C 21 53 47.646 +03 46 38.91 V N44
2022-09-06 16:24:20 C 21 53 47.550 +03 46 36.95 V N44
2022-09-06 16:24:50 C 21 53 47.459 +03 46 34.93 V N44
2022-09-06 16:25:20 C 21 53 47.362 +03 46 32.96 V N44
2022-09-06 16:25:50 C 21 53 47.280 +03 46 31.01 V N44
2022-09-06 16:26:20 C 21 53 47.178 +03 46 28.81 V N44
2022-09-06 16:26:50 C 21 53 47.088 +03 46 26.99 V N44
2022-09-06 16:27:20 C 21 53 46.987 +03 46 24.96 V N44
2022-09-06 16:27:50 C 21 53 46.894 +03 46 23.02 V N44
2022-09-06 16:28:20 C 21 53 46.802 +03 46 20.99 V N44
2022-09-06 16:28:50 C 21 53 46.710 +03 46 19.20 V N44
2022-09-06 16:29:20 C 21 53 46.614 +03 46 17.05 V N44
2022-09-06 16:29:50 C 21 53 46.519 +03 46 14.97 V N44
2022-09-06 16:30:20 C 21 53 46.427 +03 46 13.00 V N44
2022-09-06 16:30:50 C 21 53 46.335 +03 46 11.03 V N44
2022-09-06 16:31:20 C 21 53 46.239 +03 46 09.08 V N44
2022-09-06 16:31:50 C 21 53 46.142 +03 46 07.02 V N44
2022-09-06 16:32:20 C 21 53 46.050 +03 46 05.12 V N44
2022-09-06 16:32:50 C 21 53 45.964 +03 46 03.17 V N44
2022-09-06 16:33:20 C 21 53 45.869 +03 46 01.12 V N44
2022-09-06 16:33:50 C 21 53 45.768 +03 45 59.09 V N44
2022-09-06 16:34:20 C 21 53 45.678 +03 45 57.17 V N44
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)