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
2022-09-11 00:40:56 C 21 36 35.73 -02 51 15.7 q X33
2022-09-11 12:13:40 C 21 34 52.082 -03 32 33.86 V P07
2022-09-11 13:25:04 C 21 34 40.723 -03 36 49.39 V P07
2022-09-11 14:32:14 C 21 34 30.017 -03 40 48.72 V P07
2022-09-11 15:24:24 C 21 34 21.679 -03 43 54.41 V P07
2022-09-11 16:20:11 C 21 34 12.835 -03 47 12.52 V P07
2022-09-11 17:39:19 C 21 34 03.33 -03 52 38.6 V C40
2022-09-11 18:21:09 C 21 33 56.83 -03 55 07.1 V C40
2022-09-11 19:04:28 C 21 33 50.10 -03 57 40.6 V C40
2022-09-11 19:07:53 C 21 33 49.57 -03 57 52.7 V C40
2022-09-11 19:08:15 C 21 33 49.51 -03 57 54.0 V C40
2022-09-11 19:23:05 C 21 33 47.20 -03 58 46.4 V C40
2022-09-11 19:25:41 V 21 33 47.77 -03 58 57.2 V 270
2022-09-11 19:25:41 v 1 006.13176 +48.70663 270
2022-09-11 19:35:31 C 21 33 46.19 -03 59 31.3 V K83
2022-09-11 19:38:15 V 21 33 45.84 -03 59 43.6 V 270
2022-09-11 19:38:15 v 1 004.83128 +47.04031 270
2022-09-11 19:41:18 C 21 33 45.28 -03 59 51.6 V K83
2022-09-11 19:49:33 C 21 33 44.02 -04 00 20.8 V K83
2022-09-11 20:03:16 V 21 33 41.94 -04 01 12.4 V 270
2022-09-11 20:03:16 v 1 004.83128 +47.04031 270
2022-09-11 20:09:44 V 21 33 40.97 -04 01 34.6 V 270
2022-09-11 20:09:44 v 1 006.13176 +48.70663 270
2022-09-11 20:17:20 C 21 33 39.71 -04 02 02.0 V L65
2022-09-11 20:21:55 C 21 33 39.07 -04 02 17.4 V G33
2022-09-11 20:23:36 C 21 33 38.81 -04 02 23.6 V G33
2022-09-11 20:25:17 C 21 33 38.56 -04 02 29.5 V G33
2022-09-11 20:26:58 C 21 33 38.29 -04 02 35.7 V G33
2022-09-11 20:28:36 C 21 33 38.05 -04 02 41.4 V G33
2022-09-11 20:30:20 C 21 33 37.78 -04 02 47.2 V G33
2022-09-11 20:32:21 C 21 33 37.47 -04 02 54.5 V G33
2022-09-11 20:34:02 C 21 33 37.21 -04 03 00.4 V G33
2022-09-11 20:35:43 C 21 33 36.95 -04 03 06.4 V G33
2022-09-11 20:37:28 C 21 33 36.69 -04 03 12.5 V G33
2022-09-11 20:39:05 C 21 33 36.43 -04 03 18.2 V G33
2022-09-11 20:39:39 V 21 33 36.35 -04 03 20.7 V 270
2022-09-11 20:39:39 v 1 004.83128 +47.04031 270
2022-09-11 20:40:46 C 21 33 36.17 -04 03 24.2 V G33
2022-09-11 20:53:04 V 21 33 34.28 -04 04 06.6 V 270
2022-09-11 20:53:04 v 1 006.13176 +48.70663 270
2022-09-11 21:05:04 V 21 33 32.40 -04 04 50.7 V 270
2022-09-11 21:05:04 v 1 004.83128 +47.04031 270
2022-09-11 21:21:27 C 21 33 29.86 -04 05 48.6 V L65
2022-09-11 21:31:00 V 21 33 28.40 -04 06 20.0 V 270
2022-09-11 21:31:00 v 1 006.13176 +48.70663 270
2022-09-11 22:14:34 C 21 33 21.70 -04 08 56.0 V L65
2022-09-12 09:52:38 C 21 31 40.255 -04 49 20.33 U F51
2022-09-12 10:12:59 C 21 31 37.129 -04 50 30.87 U F51
2022-09-12 10:30:32 C 21 31 34.439 -04 51 31.69 U F51
2022-09-12 10:48:08 C 21 31 31.752 -04 52 32.62 U F51
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)