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
2022-08-26 09:35:21 C 22 48 18.432 +21 34 55.85 V T05
2022-08-26 09:40:18 C 22 48 17.311 +21 34 38.39 V T05
2022-08-26 10:28:50 C 22 48 06.271 +21 31 46.63 V T05
2022-08-26 10:45:13 C 22 48 02.542 +21 30 48.49 V T05
2022-08-26 18:13:55 C 22 46 27.32 +21 03 35.0 q 168
2022-08-26 19:43:39 C 22 46 09.02 +20 58 11.4 V C23
2022-08-26 19:48:35 C 22 46 07.93 +20 57 53.7 V C23
2022-08-26 19:53:07 C 22 46 06.93 +20 57 37.7 V C23
2022-08-26 20:26:54 C 22 45 57.86 +20 55 37.8 q 168
2022-08-26 21:26:07 V 22 45 46.45 +20 52 02.2 V 270
2022-08-26 21:26:07 v 1 359.62621 +49.20366 270
2022-08-26 22:38:03 V 22 45 30.73 +20 47 48.6 V 270
2022-08-26 22:38:03 v 1 359.62621 +49.20366 270
2022-08-26 23:09:52 C 22 45 21.80 +20 45 46.9 q 168
2022-08-26 23:50:51 V 22 45 14.53 +20 43 26.3 V 270
2022-08-26 23:50:51 v 1 359.62621 +49.20366 270
2022-08-27 01:09:54 V 22 44 57.17 +20 38 44.1 V 270
2022-08-27 01:09:54 v 1 359.62621 +49.20366 270
2022-08-27 02:58:40 C 22 44 34.39 +20 32 57.4 X X93
2022-08-27 03:00:56 C 22 44 33.91 +20 32 49.5 X X93
2022-08-27 03:02:37 C 22 44 33.52 +20 32 43.5 X X93
2022-08-27 04:47:43 V 22 44 12.83 +20 25 34.4 V 270
2022-08-27 04:47:43 v 1 242.98593 +33.20806 270
2022-08-27 05:13:48 V 22 44 07.02 +20 23 59.9 V 270
2022-08-27 05:13:48 v 1 242.98593 +33.20806 270
2022-08-27 05:41:00 V 22 44 00.97 +20 22 22.0 V 270
2022-08-27 05:41:00 v 1 242.98593 +33.20806 270
2022-08-27 06:07:05 V 22 43 55.10 +20 20 47.8 V 270
2022-08-27 06:07:05 v 1 242.98593 +33.20806 270
2022-08-27 12:50:40 C 22 42 25.831 +19 56 16.51 V T05
2022-08-27 12:55:19 C 22 42 24.778 +19 55 59.34 V T05
2022-08-27 13:05:55 C 22 42 22.392 +19 55 19.85 V T05
2022-08-27 13:21:01 C 22 42 19.001 +19 54 23.62 V T05
2022-08-27 18:01:36 C 22 41 22.03 +19 36 40.8 q 168
2022-08-27 19:21:50 C 22 41 04.34 +19 31 44.3 q 168
2022-08-27 19:53:25 V 22 40 58.22 +19 29 42.9 V 270
2022-08-27 19:53:25 v 1 024.63064 +60.79187 270
2022-08-27 20:31:16 V 22 40 49.93 +19 27 23.0 V 270
2022-08-27 20:31:16 v 1 024.63064 +60.79187 270
2022-08-27 20:35:07 C 22 40 49.69 +19 27 11.9 V L65
2022-08-27 21:01:48 C 22 40 42.24 +19 25 32.9 q 168
2022-08-27 21:12:54 V 22 40 40.77 +19 24 48.8 V 270
2022-08-27 21:12:54 v 1 024.63064 +60.79187 270
2022-08-27 21:53:57 C 22 40 30.71 +19 22 18.1 q 168
2022-08-27 21:57:00 V 22 40 31.04 +19 22 04.2 V 270
2022-08-27 21:57:00 v 1 024.63064 +60.79187 270
2022-08-27 22:34:23 C 22 40 23.38 +19 19 50.3 V L65
2022-08-28 00:24:32 C 22 39 58.94 +19 12 59.6 V L65
2022-08-28 10:52:25 C 22 37 45.367 +18 34 05.45 V T08
2022-08-28 10:57:55 C 22 37 44.126 +18 33 44.68 V T08
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)