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
2022-07-07 14:31:18 C 01 19 00.590 +45 34 55.67 V T05
2022-07-07 14:31:57 C 01 19 00.552 +45 34 55.34 V T05
2022-07-07 14:41:09 C 01 18 59.866 +45 34 52.86 V T05
2022-07-07 14:41:48 C 01 18 59.791 +45 34 52.86 V T05
2022-07-07 14:52:22 C 01 18 59.014 +45 34 50.05 V T05
2022-07-08 10:17:32 C 01 17 41.204 +45 28 57.36 V 703
2022-07-08 10:25:11 C 01 17 40.650 +45 28 55.42 V 703
2022-07-08 10:32:50 C 01 17 40.092 +45 28 53.51 V 703
2022-07-08 10:40:28 C 01 17 39.541 +45 28 51.56 V 703
2022-07-14 22:27:59 C 01 07 25.315 +44 39 42.52 V K73
2022-07-14 22:34:45 C 01 07 24.847 +44 39 40.61 V K73
2022-07-16 22:39:40 C 01 04 10.67 +44 23 03.0 V G33
2022-07-16 22:41:21 C 01 04 10.58 +44 23 02.0 V G33
2022-07-16 22:43:00 C 01 04 10.47 +44 23 01.6 V G33
2022-07-16 22:44:43 C 01 04 10.37 +44 23 00.6 V G33
2022-07-16 22:46:24 C 01 04 10.26 +44 23 00.4 V G33
2022-07-16 22:48:05 C 01 04 10.15 +44 22 59.9 V G33
2022-07-16 23:46:40 C 01 04 06.111 +44 22 42.10 X B72
2022-07-16 23:47:41 C 01 04 06.046 +44 22 41.81 X B72
2022-07-16 23:48:42 C 01 04 05.986 +44 22 41.47 X B72
2022-07-16 23:50:44 C 01 04 05.836 +44 22 41.01 X B72
2022-07-16 23:51:45 C 01 04 05.758 +44 22 40.57 X B72
2022-07-16 23:52:46 C 01 04 05.703 +44 22 40.17 X B72
2022-07-16 23:53:47 C 01 04 05.620 +44 22 39.66 X B72
2022-07-16 23:55:49 C 01 04 05.473 +44 22 39.10 X B72
2022-07-17 13:26:59 C 01 03 09.660 +44 18 07.48 U F52
2022-07-17 13:42:41 C 01 03 08.440 +44 18 02.51 U F52
2022-07-17 13:58:20 C 01 03 07.219 +44 17 57.28 U F52
2022-07-17 14:14:04 C 01 03 05.989 +44 17 52.09 U F52
2022-07-17 22:45:15 C 01 02 31.28 +44 14 23.3 Y 557
2022-07-17 23:27:56 C 01 02 28.26 +44 14 10.0 Y 557
2022-07-18 00:10:36 C 01 02 25.18 +44 13 56.4 Y 557
2022-07-18 23:22:22 C 01 00 47.43 +44 05 14.2 Y 557
2022-07-19 00:35:30 C 01 00 42.02 +44 04 49.8 Y 557
2022-07-19 01:57:50 C 01 00 35.75 +44 04 21.5 Y 557
2022-07-19 21:28:28 C 00 59 12.17 +43 56 35.6 Y 557
2022-07-19 22:37:32 C 00 59 07.16 +43 56 12.1 Y 557
2022-07-19 23:51:11 C 00 59 01.65 +43 55 46.8 Y 557
2022-07-20 01:04:16 C 00 58 56.04 +43 55 21.1 Y 557
2022-07-21 22:40:54 C 00 55 31.29 +43 36 26.1 Y 557
2022-07-21 23:37:48 C 00 55 26.78 +43 36 04.7 Y 557
2022-07-22 00:24:45 C 00 55 22.98 +43 35 46.6 Y 557
2022-07-22 01:27:18 C 00 55 17.84 +43 35 22.1 Y 557
2022-07-24 00:54:51 C 00 51 30.56 +43 13 50.7 Y 557
2022-07-24 01:16:12 C 00 51 28.68 +43 13 41.3 Y 557
2022-07-24 01:40:35 C 00 51 26.52 +43 13 30.4 Y 557
2022-07-24 08:12:40 S 00 50 51.67 +43 10 17.2 L C51
2022-07-24 11:20:25 S 00 50 35.96 +43 08 45.8 L C51
2022-07-24 14:28:22 S 00 50 20.16 +43 07 14.1 L C51
2022-07-24 16:02:15 S 00 50 12.254 +43 06 27.90 L C51
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)