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
2000-08-24 19:57:57 C 23 43 59.42 +22 17 58.4 d 557
2000-08-24 20:25:22 C 23 43 54.54 +22 16 46.0 z 151
2000-08-24 20:29:31 C 23 43 53.78 +22 16 35.1 z 151
2000-08-24 20:30:57 C 23 43 53.52 +22 16 31.3 z 151
2000-08-24 20:32:01 C 23 43 53.32 +22 16 28.5 z 151
2000-08-24 20:33:10 C 23 43 53.12 +22 16 25.4 z 151
2000-08-24 20:36:17 C 23 43 52.38 +22 16 16.9 d 557
2000-08-24 20:37:18 C 23 43 52.36 +22 16 14.5 z 151
2000-08-24 21:15:03 C 23 43 45.20 +22 14 33.7 d 557
2000-08-24 21:42:35 C 23 43 40.08 +22 13 20.3 d 557
2000-08-24 21:43:50 C 23 43 40.10 +22 13 17.8 14.1 z 185
2000-08-24 23:21:42 C 23 43 21.77 +22 08 55.6 14.3 z 185
2000-08-24 23:34:02 C 23 43 19.44 +22 08 22.3 14.4 z 185
2000-08-24 23:53:59 C 23 43 15.61 +22 07 30.0 a 130
2000-08-25 00:11:30 C 23 43 12.24 +22 06 43.1 a 130
2000-08-25 00:40:59 C 23 43 06.63 +22 05 22.3 a 130
2000-08-25 05:53:11 C 23 42 10.78 +21 51 09.5 z 762
2000-08-25 05:58:44 C 23 42 09.71 +21 50 54.3 z 762
2000-08-25 06:19:24 C 23 42 05.77 +21 49 57.8 z 762
2000-08-25 20:59:33 C 23 39 25.73 +21 08 53.7 d 557
2000-08-25 21:22:59 C 23 39 21.58 +21 07 47.9 14.4 178
2000-08-25 21:26:50 C 23 39 20.78 +21 07 37.2 14.4 178
2000-08-25 21:33:07 C 23 39 19.56 +21 07 19.3 14.4 178
2000-08-25 21:35:21 C 23 39 18.89 +21 07 13.3 d 557
2000-08-25 21:36:57 C 23 39 18.82 +21 07 08.8 14.4 178
2000-08-25 21:41:35 C 23 39 17.95 +21 06 55.5 14.4 178
2000-08-25 22:33:31 C 23 39 07.75 +21 04 29.6 d 557
2000-08-25 23:27:43 C 23 38 57.32 +21 01 56.3 d 557
2000-08-26 00:21:57 C 23 38 46.81 +20 59 21.9 d 557
2000-08-26 01:10:49 C 23 38 37.35 +20 57 02.1 d 557
2000-08-26 02:14:22 C 23 38 25.05 +20 53 59.3 d 557
2000-08-26 14:12:52 C 23 36 13.14 +20 19 26.7 m 349
2000-08-26 14:19:21 C 23 36 11.84 +20 19 07.6 m 349
2000-08-26 14:20:37 C 23 36 11.62 +20 19 03.7 m 349
2000-08-28 05:07:48 C 23 28 49.01 +18 20 53.3 642
2000-08-28 05:10:46 C 23 28 48.42 +18 20 44.2 642
2000-08-28 05:13:45 C 23 28 47.87 +18 20 34.4 642
2000-08-28 05:16:56 C 23 28 47.22 +18 20 25.2 642
2000-08-28 13:14:14 C 23 27 14.48 +17 55 21.2 z 367
2000-08-28 13:16:14 C 23 27 14.07 +17 55 14.8 z 367
2000-08-28 13:18:14 C 23 27 13.65 +17 55 08.5 z 367
2000-08-29 02:53:00 C 23 24 31.57 +17 11 13.3 14.0 635
2000-08-29 02:56:07 C 23 24 30.90 +17 11 02.8 14.0 635
2000-08-29 03:05:49 C 23 24 28.96 +17 10 31.1 13.9 635
2000-08-29 03:09:38 C 23 24 28.18 +17 10 18.5 14.0 635
2000-08-29 03:18:42 C 23 24 26.36 +17 09 48.9 14.0 635
2000-08-29 03:41:34 C 23 24 21.56 +17 08 32.8 13.9 635
2000-08-29 03:44:16 C 23 24 21.05 +17 08 23.3 14.1 635
2000-08-29 03:51:08 C 23 24 19.63 +17 08 00.7 14.0 635
2000-08-29 03:53:53 C 23 24 19.04 +17 07 51.1 14.0 635
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)