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
2003-08-09 14:21:33 C 21 35 41.42 +52 04 51.0 m 379
2003-08-09 14:22:42 C 21 35 41.07 +52 04 46.7 m 379
2003-08-09 14:23:51 C 21 35 40.70 +52 04 42.3 m 379
2003-08-09 14:26:08 C 21 35 39.97 +52 04 33.0 m 379
2003-08-09 14:27:17 C 21 35 39.59 +52 04 28.7 m 379
2003-08-10 21:53:57 C 21 26 30.05 +49 58 21.3 c 240
2003-08-10 21:55:33 C 21 26 29.58 +49 58 14.7 c 240
2003-08-10 21:57:29 C 21 26 29.01 +49 58 06.8 c 240
2003-08-10 21:59:58 C 21 26 28.26 +49 57 56.8 c 240
2003-08-10 22:02:40 C 21 26 27.47 +49 57 45.6 c 240
2003-08-10 22:03:44 C 21 26 27.14 +49 57 41.3 c 240
2003-08-10 22:07:31 C 21 26 26.03 +49 57 25.8 c 240
2003-08-11 21:46:01 C 21 19 56.03 +48 17 52.3 c 204
2003-08-11 21:47:04 C 21 19 55.73 +48 17 47.9 c 204
2003-08-11 21:48:08 C 21 19 55.42 +48 17 43.0 c 204
2003-08-11 21:50:15 C 21 19 54.77 +48 17 34.4 c 204
2003-08-11 22:03:01 C 21 19 51.23 +48 16 40.0 c 204
2003-08-11 22:04:24 C 21 19 50.83 +48 16 34.1 c 204
2003-08-12 04:01:18 C 21 18 16.76 +47 50 55.1 c 649
2003-08-12 04:03:58 C 21 18 16.02 +47 50 43.9 c 649
2003-08-12 04:06:37 C 21 18 15.29 +47 50 32.3 c 649
2003-08-12 04:09:17 C 21 18 14.55 +47 50 21.0 c 649
2003-08-13 22:07:56 C 21 07 38.65 +44 42 15.3 r 938
2003-08-13 22:09:57 C 21 07 38.16 +44 42 05.8 r 938
2003-08-13 22:12:00 C 21 07 37.62 +44 41 56.7 r 938
2003-08-13 22:16:01 C 21 07 36.64 +44 41 38.3 r 938
2003-08-13 22:42:57 C 21 07 29.77 +44 39 35.1 r 938
2003-08-13 22:44:59 C 21 07 29.21 +44 39 26.4 r 938
2003-08-13 22:46:58 C 21 07 28.74 +44 39 17.1 r 938
2003-08-13 22:48:59 C 21 07 28.21 +44 39 07.8 r 938
2003-08-13 22:51:00 C 21 07 27.68 +44 38 58.5 r 938
2003-08-15 02:39:48 C 21 01 00.59 +42 28 08.6 i 726
2003-08-15 02:44:49 C 21 00 59.27 +42 27 46.6 i 726
2003-08-15 02:49:49 C 21 00 58.10 +42 27 23.3 i 726
2003-08-15 02:54:48 C 21 00 56.93 +42 26 59.8 i 726
2003-08-15 02:59:48 C 21 00 55.75 +42 26 36.3 i 726
2003-08-15 03:04:48 C 21 00 54.55 +42 26 12.9 i 726
2003-08-16 02:51:56 C 20 55 42.61 +40 31 16.0 i 726
2003-08-16 02:56:55 C 20 55 41.48 +40 30 52.4 i 726
2003-08-16 03:01:55 C 20 55 40.14 +40 30 23.9 i 726
2003-08-16 03:06:55 C 20 55 39.23 +40 30 04.1 i 726
2003-08-16 03:11:56 C 20 55 38.12 +40 29 39.8 i 726
2003-08-16 03:16:56 C 20 55 37.01 +40 29 16.0 i 726
2003-08-16 23:03:33 C 20 51 29.38 +38 51 53.8 o 620
2003-08-16 23:04:49 C 20 51 29.09 +38 51 47.5 o 620
2003-08-16 23:06:01 C 20 51 28.83 +38 51 41.4 o 620
2003-08-16 23:07:16 C 20 51 28.57 +38 51 35.2 o 620
2003-08-16 23:12:12 C 20 51 27.50 +38 51 10.8 o 620
2003-08-16 23:22:41 C 20 51 25.21 +38 50 18.6 o 620
2003-08-16 23:26:25 C 20 51 24.41 +38 50 00.4 o 620
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)