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
2003-08-24 02:54:11 C 20 23 31.02 +24 11 58.8 r 649
2003-08-24 02:55:58 C 20 23 30.79 +24 11 49.9 r 649
2003-08-29 12:20:00 C 20 09 56.48 +13 42 07.7 m 379
2003-08-29 12:21:09 C 20 09 56.37 +13 42 02.5 m 379
2003-08-29 12:22:18 C 20 09 56.26 +13 41 57.4 m 379
2003-08-29 12:23:26 C 20 09 56.13 +13 41 51.9 m 379
2003-08-29 12:24:35 C 20 09 56.06 +13 41 46.9 m 379
2003-08-29 12:25:44 C 20 09 55.93 +13 41 41.3 m 379
2003-08-29 12:26:53 C 20 09 55.84 +13 41 36.4 m 379
2003-08-29 12:28:03 C 20 09 55.69 +13 41 31.0 m 379
2003-08-29 12:29:12 C 20 09 55.60 +13 41 25.6 m 379
2003-08-29 12:30:21 C 20 09 55.50 +13 41 20.4 m 379
2003-08-29 12:33:16 C 20 09 55.25 +13 41 07.5 m 379
2003-08-29 12:35:26 C 20 09 55.00 +13 40 57.3 m 379
2003-08-29 12:39:43 C 20 09 54.60 +13 40 37.5 m 379
2003-08-29 12:41:53 C 20 09 54.42 +13 40 28.0 m 379
2003-08-29 12:44:02 C 20 09 54.20 +13 40 18.1 m 379
2003-08-30 12:48:23 C 20 07 58.01 +11 51 46.4 m 379
2003-08-30 12:54:07 C 20 07 57.51 +11 51 20.6 m 379
2003-08-30 12:55:34 C 20 07 57.35 +11 51 14.4 m 379
2003-08-30 12:59:00 C 20 07 57.12 +11 50 58.9 m 379
2003-08-30 13:00:09 C 20 07 57.00 +11 50 53.9 m 379
2003-08-31 11:55:32 C 20 06 16.34 +10 10 36.1 m 379
2003-08-31 11:57:50 C 20 06 16.13 +10 10 26.3 m 379
2003-08-31 12:02:07 C 20 06 15.80 +10 10 08.0 m 379
2003-08-31 12:03:16 C 20 06 15.69 +10 10 03.0 m 379
2003-08-31 12:04:26 C 20 06 15.61 +10 09 58.4 m 379
2003-08-31 12:05:35 C 20 06 15.53 +10 09 52.9 m 379
2003-08-31 23:53:14 C 20 05 25.18 +09 19 18.0 d 557
2003-09-01 00:06:04 C 20 05 24.25 +09 18 23.3 d 557
2003-09-01 00:20:20 C 20 05 23.23 +09 17 22.7 d 557
2003-09-01 19:37:39 C 20 04 10.84 +07 56 54.2 r 170
2003-09-01 19:40:45 C 20 04 10.62 +07 56 41.7 r 170
2003-09-01 19:43:13 C 20 04 10.44 +07 56 31.4 r 170
2003-09-02 11:33:42 C 20 03 12.78 +06 52 06.1 m 379
2003-09-02 11:34:50 C 20 03 12.69 +06 52 01.5 m 379
2003-09-02 11:35:59 C 20 03 12.59 +06 51 56.8 m 379
2003-09-02 11:38:17 C 20 03 12.42 +06 51 47.8 m 379
2003-09-02 21:43:07 C 20 02 37.04 +06 11 23.8 557
2003-09-02 22:44:27 C 20 02 33.21 +06 07 20.8 557
2003-09-03 00:08:39 C 20 02 28.11 +06 01 47.4 557
2003-09-03 06:06:51 C 20 02 09.12 +05 38 30.1 15.4 c 704
2003-09-03 06:24:03 C 20 02 08.03 +05 37 22.7 15.4 c 704
2003-09-03 06:41:20 C 20 02 06.97 +05 36 14.8 15.2 c 704
2003-09-03 06:58:42 C 20 02 05.88 +05 35 06.8 15.2 c 704
2003-09-03 11:46:58 C 20 01 52.22 +05 16 26.1 m 379
2003-09-03 12:42:44 C 20 01 48.76 +05 12 50.4 m 379
2003-09-03 12:45:01 C 20 01 48.61 +05 12 41.1 m 379
2003-09-03 12:46:10 C 20 01 48.57 +05 12 37.3 m 379
2003-09-03 12:47:19 C 20 01 48.49 +05 12 32.6 m 379
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)