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
1994-09-30 02:22:19 C 04 08 58.39 -18 15 01.9 046
1994-09-30 02:29:55 C 04 08 59.19 -18 15 40.6 046
1994-09-30 02:40:20 C 04 09 00.28 -18 16 33.8 046
1994-10-05 02:17:56 C 04 24 09.33 -29 29 41.4 046
1994-10-05 02:21:09 C 04 24 09.73 -29 30 01.1 046
1994-10-05 02:22:37 C 04 24 09.94 -29 30 09.7 046
1994-10-07 15:16:24 04 33 33.96 -35 51 25.8 m 423
1994-10-07 15:38:46 04 33 37.47 -35 53 50.1 m 423
1994-10-07 15:56:53 04 33 40.15 -35 55 48.0 m 423
1994-10-07 16:09:25 04 33 42.13 -35 57 09.8 m 423
1994-10-07 16:21:05 04 33 43.82 -35 58 24.5 m 423
1994-10-07 16:33:31 04 33 45.62 -35 59 44.5 m 423
1994-10-07 16:45:32 04 33 47.53 -36 01 04.4 m 423
1994-10-07 17:01:22 04 33 49.85 -36 02 44.8 m 423
1997-07-10 00:57:46 C 01 13 58.48 +26 55 10.1 z 118
1997-07-10 01:08:10 C 01 13 58.96 +26 55 09.8 z 118
1997-07-14 00:12:50 C 01 18 39.02 +26 49 00.1 557
1997-07-14 00:17:03 C 01 18 39.23 +26 48 59.9 557
1997-07-14 00:21:16 C 01 18 39.42 +26 48 59.5 557
1997-07-23 00:13:58 C 01 28 39.38 +26 22 22.7 z 118
1997-07-23 00:22:18 C 01 28 39.72 +26 22 21.3 z 118
1997-07-27 00:27:15 C 01 32 42.50 +26 02 58.4 z 118
1997-07-27 00:56:00 C 01 32 43.56 +26 02 52.4 z 118
1997-08-02 00:46:23 C 01 38 04.48 +25 21 45.8 z 118
1997-08-02 00:55:49 C 01 38 04.76 +25 21 42.5 z 118
1997-08-08 02:13:41 C 01 42 20.35 +24 20 48.7 z 046
1997-08-08 02:15:54 C 01 42 20.40 +24 20 47.6 z 046
1997-08-08 02:17:43 C 01 42 20.43 +24 20 46.8 z 046
1997-08-09 04:20:29 C 01 42 58.29 +24 07 15.1 784
1997-08-09 04:31:15 C 01 42 58.53 +24 07 09.6 784
1997-08-09 05:34:29 C 01 42 59.87 +24 06 37.5 784
1997-08-10 03:58:45 C 01 43 29.34 +23 54 14.3 784
1997-08-10 04:04:29 C 01 43 29.48 +23 54 11.2 784
1997-08-10 23:08:17 C 01 43 52.41 +23 43 08.3 z 046
1997-08-10 23:12:22 C 01 43 52.49 +23 43 06.0 z 046
1997-08-10 23:14:58 C 01 43 52.53 +23 43 04.5 z 046
1997-08-12 01:33:46 C 01 44 21.16 +23 26 59.6 z 046
1997-08-12 01:36:42 C 01 44 21.20 +23 26 57.7 z 046
1997-08-12 01:39:59 C 01 44 21.24 +23 26 55.6 z 046
1997-08-14 11:09:37 C 01 45 13.36 +22 48 05.5 c 608
1997-08-14 13:40:35 C 01 45 14.33 +22 46 19.3 c 608
1997-08-15 09:40:45 C 01 45 27.80 +22 31 12.6 z 712
1997-08-15 10:05:38 C 01 45 27.92 +22 30 53.8 z 712
1997-08-15 11:27:16 C 01 45 29.61 +22 29 57.2 c 608
1997-08-15 12:23:38 C 01 45 29.84 +22 29 15.1 c 608
1997-08-21 02:14:46 C 01 45 53.37 +20 27 55.0 z 118
1997-08-21 02:19:29 C 01 45 53.33 +20 27 49.9 z 118
1997-08-24 16:54:08 C 01 45 00.73 +18 46 44.5 z 900
1997-08-24 17:07:22 C 01 45 00.43 +18 46 27.4 z 900
1997-08-25 22:34:44 C 01 44 28.34 +18 06 55.8 z 118
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)