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
2022-08-18 23:06:50 C 23 25 39.69 +30 36 59.2 Y 557
2022-08-19 00:01:02 C 23 25 28.39 +30 34 44.4 Y 557
2022-08-19 00:55:49 C 23 25 16.93 +30 32 27.0 Y 557
2022-08-19 01:56:13 C 23 25 04.33 +30 29 54.3 Y 557
2022-08-19 02:55:06 C 23 24 52.06 +30 27 24.2 Y 557
2022-08-19 05:18:46 C 23 24 26.839 +30 21 24.59 Z U76
2022-08-19 05:36:00 C 23 24 23.273 +30 20 41.89 Z U76
2022-08-19 05:51:49 C 23 24 20.009 +30 20 02.69 Z U76
2022-08-19 12:27:24 C 23 22 57.852 +30 03 25.70 V T05
2022-08-19 12:31:58 C 23 22 56.870 +30 03 13.93 V T05
2022-08-19 12:46:04 C 23 22 53.842 +30 02 37.25 V T05
2022-08-19 13:00:40 C 23 22 50.700 +30 01 59.27 V T05
2022-08-19 21:08:42 V 23 21 14.40 +29 40 26.9 V 270
2022-08-19 21:08:42 v 1 359.62621 +49.20366 270
2022-08-19 22:59:03 V 23 20 51.66 +29 35 30.4 V 270
2022-08-19 22:59:03 v 1 359.62621 +49.20366 270
2022-08-20 00:18:41 V 23 20 34.84 +29 32 01.2 V 270
2022-08-20 00:18:41 v 1 359.62621 +49.20366 270
2022-08-20 01:37:33 V 23 20 18.01 +29 28 32.4 V 270
2022-08-20 01:37:33 v 1 359.62621 +49.20366 270
2022-08-20 11:55:33 C 23 18 11.854 +29 01 09.70 V T08
2022-08-20 12:03:45 C 23 18 10.063 +29 00 47.27 V T08
2022-08-20 12:08:21 C 23 18 09.058 +29 00 34.74 V T08
2022-08-20 12:23:42 C 23 18 05.707 +28 59 52.69 V T08
2022-08-20 20:12:59 C 23 16 31.951 +28 37 57.32 V K73
2022-08-20 20:15:44 C 23 16 31.370 +28 37 49.91 V K73
2022-08-20 20:18:29 C 23 16 30.780 +28 37 42.42 V K73
2022-08-20 20:21:13 C 23 16 30.221 +28 37 35.00 V K73
2022-08-20 20:23:58 C 23 16 29.640 +28 37 27.59 V K73
2022-08-20 20:40:12 C 23 16 25.72 +28 36 40.7 V L18
2022-08-20 20:40:45 C 23 16 25.60 +28 36 39.0 V L18
2022-08-20 20:41:19 C 23 16 25.45 +28 36 37.4 V L18
2022-08-20 20:41:53 C 23 16 25.34 +28 36 35.9 V L18
2022-08-20 20:42:26 C 23 16 25.22 +28 36 34.4 V L18
2022-08-20 21:03:19 V 23 16 20.38 +28 35 28.7 V 270
2022-08-20 21:03:19 v 1 025.76481 +62.27742 270
2022-08-20 21:50:56 V 23 16 10.28 +28 33 17.4 V 270
2022-08-20 21:50:56 v 1 025.76481 +62.27742 270
2022-08-20 22:01:55 V 23 16 07.97 +28 32 47.5 V 270
2022-08-20 22:01:55 v 1 024.63076 +60.79185 270
2022-08-20 22:32:53 V 23 16 01.40 +28 31 20.9 V 270
2022-08-20 22:32:53 v 1 025.76481 +62.27742 270
2022-08-20 22:38:51 V 23 16 00.17 +28 31 05.3 V 270
2022-08-20 22:38:51 v 1 024.63076 +60.79185 270
2022-08-20 23:10:37 V 23 15 53.37 +28 29 36.2 V 270
2022-08-20 23:10:37 v 1 025.76481 +62.27742 270
2022-08-20 23:31:45 V 23 15 48.86 +28 28 38.0 V 270
2022-08-20 23:31:45 v 1 024.63076 +60.79185 270
2022-08-20 23:39:16 C 23 15 47.91 +28 28 27.0 t B66
2022-08-21 00:16:16 V 23 15 39.41 +28 26 33.9 V 270
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)