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
2022-09-03 13:57:40 V 22 07 38.46 +08 47 49.1 V 270
2022-09-03 13:57:40 v 1 114.16981 +22.37600 270
2022-09-03 14:38:42 V 22 07 30.46 +08 45 10.7 V 270
2022-09-03 14:38:42 v 1 114.16981 +22.37600 270
2022-09-03 19:08:32 V 22 06 38.50 +08 26 23.8 V 270
2022-09-03 19:08:32 v 1 026.21274 +60.73341 270
2022-09-03 19:51:43 V 22 06 29.96 +08 23 28.2 V 270
2022-09-03 19:51:43 v 1 026.21274 +60.73341 270
2022-09-03 20:10:47 V 22 06 26.73 +08 22 14.5 V 270
2022-09-03 20:10:47 v 1 011.61719 +52.12496 270
2022-09-03 20:27:46 V 22 06 23.65 +08 21 08.0 V 270
2022-09-03 20:27:46 v 1 004.83110 +47.04032 270
2022-09-03 20:33:51 V 22 06 21.55 +08 20 37.2 V 270
2022-09-03 20:33:51 v 1 026.21274 +60.73341 270
2022-09-03 20:49:11 V 22 06 19.05 +08 19 38.4 V 270
2022-09-03 20:49:11 v 1 011.61719 +52.12496 270
2022-09-03 21:06:17 V 22 06 15.95 +08 18 31.9 V 270
2022-09-03 21:06:17 v 1 004.83110 +47.04032 270
2022-09-03 21:12:14 V 22 06 13.93 +08 18 01.0 V 270
2022-09-03 21:12:14 v 1 026.21274 +60.73341 270
2022-09-03 21:12:39 C 22 06 12.89 +08 17 59.9 q 168
2022-09-03 21:31:28 C 22 06 10.65 +08 16 45.3 V L65
2022-09-03 21:33:30 V 22 06 10.18 +08 16 38.4 V 270
2022-09-03 21:33:30 v 1 011.61719 +52.12496 270
2022-09-03 21:55:52 V 22 06 05.97 +08 15 10.0 V 270
2022-09-03 21:55:52 v 1 004.83110 +47.04032 270
2022-09-03 22:20:31 V 22 06 00.73 +08 13 26.2 V 270
2022-09-03 22:20:31 v 1 011.61719 +52.12496 270
2022-09-03 22:23:16 C 22 06 00.27 +08 13 14.4 V L65
2022-09-03 22:34:15 V 22 05 58.22 +08 12 33.2 V 270
2022-09-03 22:34:15 v 1 004.83110 +47.04032 270
2022-09-03 22:45:03 C 22 05 54.62 +08 11 42.2 q 168
2022-09-03 23:24:23 C 22 05 48.04 +08 09 05.1 V L65
2022-09-04 02:19:01 C 22 05 15.65 +07 57 54.8 q X33
2022-09-04 02:40:38 C 22 05 11.29 +07 56 26.7 q X33
2022-09-04 02:48:35 C 22 05 09.66 +07 55 54.7 q X33
2022-09-04 09:48:18 C 22 03 49.128 +07 27 06.55 V T08
2022-09-04 09:54:13 C 22 03 47.930 +07 26 42.50 V T08
2022-09-04 10:02:05 C 22 03 46.339 +07 26 10.46 V T08
2022-09-04 10:17:40 C 22 03 43.178 +07 25 06.96 V T08
2022-09-04 19:25:02 V 22 02 01.91 +06 47 38.6 V 270
2022-09-04 19:25:02 v 1 006.13170 +48.70661 270
2022-09-04 19:35:43 C 22 01 58.95 +06 46 59.4 V C40
2022-09-04 19:36:23 C 22 01 58.82 +06 46 56.7 V C40
2022-09-04 19:37:05 C 22 01 58.68 +06 46 53.9 V C40
2022-09-04 19:38:27 C 22 01 58.41 +06 46 48.3 V C40
2022-09-04 19:39:50 C 22 01 58.14 +06 46 42.7 V C40
2022-09-04 19:40:30 C 22 01 58.01 +06 46 39.9 V C40
2022-09-04 19:41:12 C 22 01 57.87 +06 46 37.2 V C40
2022-09-04 19:41:52 C 22 01 57.73 +06 46 34.4 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)