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
2022-08-24 21:12:53 v 1 000.58000 +45.17000 270
2022-08-24 22:57:58 C 22 55 41.10 +23 34 15.1 q 168
2022-08-24 23:17:14 C 22 55 38.40 +23 33 14.3 V L65
2022-08-25 00:53:16 C 22 55 17.04 +23 27 50.5 V L65
2022-08-25 01:50:37 C 22 55 04.04 +23 24 42.0 X L63
2022-08-25 01:57:00 C 22 55 02.62 +23 24 20.2 X L63
2022-08-25 02:03:02 C 22 55 01.27 +23 23 59.7 X L63
2022-08-25 05:08:19 C 22 54 23.64 +23 13 35.9 q W29
2022-08-25 05:18:23 C 22 54 21.29 +23 13 02.3 q W29
2022-08-25 05:26:19 C 22 54 19.51 +23 12 35.4 q W29
2022-08-25 10:54:13 C 22 53 08.971 +22 54 10.76 V T08
2022-08-25 10:58:58 C 22 53 07.889 +22 53 54.46 V T08
2022-08-25 11:09:50 C 22 53 05.417 +22 53 17.12 V T08
2022-08-25 11:24:33 C 22 53 02.064 +22 52 26.54 V T08
2022-08-25 18:09:49 C 22 51 36.71 +22 28 37.4 q 168
2022-08-25 19:46:02 V 22 51 17.21 +22 23 06.2 V 270
2022-08-25 19:46:02 v 1 005.51478 +44.40826 270
2022-08-25 19:47:37 V 22 51 15.85 +22 22 53.8 V 270
2022-08-25 19:47:37 v 1 024.63071 +60.79185 270
2022-08-25 20:24:29 V 22 51 08.77 +22 20 53.5 V 270
2022-08-25 20:24:29 v 1 005.51478 +44.40826 270
2022-08-25 20:27:43 V 22 51 07.39 +22 20 40.8 V 270
2022-08-25 20:27:43 v 1 024.63071 +60.79185 270
2022-08-25 20:34:54 C 22 51 04.55 +22 20 14.8 q 168
2022-08-25 20:35:23 C 22 51 06.00 +22 20 12.0 V L65
2022-08-25 21:08:13 V 22 50 58.07 +22 18 15.1 V 270
2022-08-25 21:08:13 v 1 024.63071 +60.79185 270
2022-08-25 21:09:21 V 22 50 58.88 +22 18 19.6 V 270
2022-08-25 21:09:21 v 1 005.51478 +44.40826 270
2022-08-25 21:10:16 V 22 50 58.54 +22 18 10.6 V 270
2022-08-25 21:10:16 v 1 357.84027 +52.36593 270
2022-08-25 21:46:22 C 22 50 50.34 +22 16 06.7 V L65
2022-08-25 21:48:55 V 22 50 50.02 +22 15 57.1 V 270
2022-08-25 21:48:55 v 1 357.84027 +52.36593 270
2022-08-25 21:51:05 V 22 50 48.62 +22 15 46.6 V 270
2022-08-25 21:51:05 v 1 024.63071 +60.79185 270
2022-08-25 21:53:59 V 22 50 48.93 +22 15 45.7 V 270
2022-08-25 21:53:59 v 1 005.51478 +44.40826 270
2022-08-25 22:15:35 C 22 50 43.68 +22 14 27.4 Y 557
2022-08-25 22:33:44 V 22 50 40.15 +22 13 22.2 V 270
2022-08-25 22:33:44 v 1 357.84027 +52.36593 270
2022-08-25 23:03:56 C 22 50 31.55 +22 11 32.9 q 168
2022-08-25 23:15:07 C 22 50 30.40 +22 11 00.2 Y 557
2022-08-25 23:18:11 C 22 50 29.92 +22 10 47.4 V L65
2022-08-25 23:20:11 V 22 50 29.86 +22 10 40.6 V 270
2022-08-25 23:20:11 v 1 357.84027 +52.36593 270
2022-08-26 00:15:09 C 22 50 16.99 +22 07 29.9 Y 557
2022-08-26 00:44:48 C 22 50 10.35 +22 05 45.5 Y 557
2022-08-26 01:47:24 C 22 49 56.43 +22 02 04.8 Y 557
2022-08-26 02:46:50 C 22 49 43.30 +21 58 34.4 Y 557
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)