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
2000-09-05 11:46:54 C 22 48 46.07 +06 27 28.5 c 467
2000-09-05 11:52:23 C 22 48 44.91 +06 27 07.1 c 467
2000-09-05 12:02:24 C 22 48 42.78 +06 26 28.2 c 467
2000-09-08 20:28:24 C 22 32 38.48 +01 09 15.5 c 195
2000-09-08 21:01:30 C 22 32 31.74 +01 07 05.3 c 195
2000-09-09 19:50:02 C 22 28 06.19 -00 22 00.8 c 195
2000-09-09 20:29:43 C 22 27 58.22 -00 24 34.8 c 195
2000-09-10 00:55:27 C 22 27 04.96 -00 41 48.1 c 113
2000-09-10 00:58:32 C 22 27 04.35 -00 41 59.9 c 113
2000-09-10 01:04:54 C 22 27 03.07 -00 42 24.7 c 113
2000-09-11 19:20:08 C 22 19 07.05 -03 24 25.2 544
2000-09-11 19:26:30 C 22 19 05.88 -03 24 49.4 544
2000-09-11 19:34:58 C 22 19 04.26 -03 25 21.1 544
2000-09-11 19:53:48 C 22 19 00.62 -03 26 32.1 544
2000-09-15 13:08:23 C 22 03 15.39 -08 49 35.8 m 349
2000-09-15 13:09:29 C 22 03 15.19 -08 49 39.6 m 349
2000-09-15 13:13:13 C 22 03 14.52 -08 49 52.4 m 349
2000-09-15 13:15:28 C 22 03 14.14 -08 50 00.0 m 349
2000-09-16 22:25:24 C 21 57 49.59 -10 41 36.4 952
2000-09-16 22:30:11 C 21 57 48.75 -10 41 52.4 952
2000-09-16 22:32:11 C 21 57 48.38 -10 41 59.6 952
2000-09-16 22:34:14 C 21 57 48.02 -10 42 06.3 952
2000-09-20 02:03:45 C 21 46 28.71 -14 35 21.7 i 808
2000-09-20 03:01:40 C 21 46 19.97 -14 38 07.1 i 808
2000-09-21 04:53:43 C 21 42 47.29 -15 52 11.1 14.0 c 704
2000-09-21 05:14:59 C 21 42 44.23 -15 53 09.8 14.4 c 704
2000-09-21 05:32:17 C 21 42 43.75 -15 53 47.0 15.8 c 608
2000-09-21 05:36:13 C 21 42 41.18 -15 54 08.0 14.7 c 704
2000-09-21 05:47:52 C 21 42 41.53 -15 54 30.0 15.9 c 608
2000-09-21 05:57:30 C 21 42 38.13 -15 55 06.7 14.3 c 704
2000-09-21 06:03:25 C 21 42 39.30 -15 55 13.7 16.1 c 608
2000-09-21 06:18:46 C 21 42 35.10 -15 56 04.9 c 704
2000-09-23 18:19:28 C 21 35 03.68 -18 32 51.4 151
2000-09-23 18:22:52 C 21 35 03.27 -18 32 59.7 151
2000-09-23 18:28:39 C 21 35 02.55 -18 33 14.0 151
2000-09-23 18:30:15 C 21 35 02.34 -18 33 18.3 151
2000-09-23 20:26:44 C 21 34 47.32 -18 38 05.5 056
2000-09-23 20:41:24 C 21 34 45.52 -18 38 41.0 056
2000-09-24 04:18:02 C 21 33 52.76 -18 57 06.2 14.7 c 704
2000-09-24 04:40:03 C 21 33 50.01 -18 57 59.1 14.7 c 704
2000-09-24 05:02:55 C 21 33 47.15 -18 58 54.4 14.7 c 704
2000-09-24 05:26:03 C 21 33 44.26 -18 59 49.7 14.7 c 704
2000-09-24 05:48:12 C 21 33 41.50 -19 00 42.6 14.6 c 704
2000-09-24 12:43:36 C 21 32 54.41 -19 17 15.9 900
2000-09-24 12:54:23 C 21 32 53.08 -19 17 41.6 900
2000-09-24 22:01:30 C 21 31 51.11 -19 39 10.9 056
2000-09-24 22:23:04 C 21 31 48.59 -19 39 59.3 056
2000-09-25 01:26:04 C 21 31 28.50 -19 46 30.4 z 859
2000-09-25 01:28:07 C 21 31 28.28 -19 46 34.9 z 859
2000-09-25 01:30:11 C 21 31 28.03 -19 46 39.5 z 859
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)