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
2025-08-29 19:27:07 C 19 20 00.69 +10 21 35.6 X D04
2025-08-29 19:27:31 C 19 20 00.69 +10 21 34.1 X C40
2025-08-29 19:29:55 C 19 20 00.68 +10 21 24.1 X C40
2025-08-29 19:32:19 C 19 20 00.65 +10 21 13.9 X C40
2025-08-29 19:34:44 C 19 20 00.63 +10 21 03.7 X C40
2025-08-29 19:37:09 C 19 20 00.61 +10 20 53.6 X C40
2025-08-29 19:39:27 C 19 20 00.59 +10 20 43.8 X C40
2025-08-29 19:41:40 C 19 20 00.57 +10 20 34.5 X C40
2025-08-29 19:43:53 C 19 20 00.55 +10 20 25.3 X C40
2025-08-29 19:46:06 C 19 20 00.53 +10 20 15.9 X C40
2025-08-29 19:59:36 C 19 20 00.953 +10 20 10.46 V M22
2025-08-29 20:03:31 C 19 20 00.907 +10 19 54.05 V M22
2025-08-29 20:10:39 C 19 20 00.828 +10 19 23.88 V M22
2025-08-29 20:38:03 C 19 20 00.535 +10 17 28.82 V M22
2025-08-29 22:14:41 C 19 20 00.970 +10 10 04.04 V R17
2025-08-29 23:34:47 C 19 20 00.110 +10 04 28.67 V R17
2025-08-29 23:59:09 C 19 19 59.878 +10 02 46.68 V R17
2025-08-30 00:25:57 C 19 19 59.635 +10 00 54.43 V R17
2025-08-30 01:32:18 C 19 20 00.64 +09 56 59.5 834
2025-08-30 02:07:49 C 19 20 00.29 +09 54 31.4 834
2025-08-30 19:32:06 C 19 20 01.60 +08 42 19.2 X C40
2025-08-30 19:34:06 C 19 20 01.60 +08 42 11.1 X C40
2025-08-30 19:36:07 C 19 20 01.59 +08 42 02.9 X C40
2025-08-30 19:38:08 C 19 20 01.57 +08 41 54.8 X C40
2025-08-30 19:40:09 C 19 20 01.56 +08 41 46.7 X C40
2025-08-30 19:42:10 C 19 20 01.55 +08 41 38.5 X C40
2025-08-30 19:44:10 C 19 20 01.54 +08 41 30.3 X C40
2025-08-30 19:46:11 C 19 20 01.53 +08 41 22.3 X C40
2025-08-30 19:48:11 C 19 20 01.53 +08 41 14.1 X C40
2025-08-30 19:50:12 C 19 20 01.51 +08 41 06.0 X C40
2025-08-30 19:52:12 C 19 20 01.51 +08 40 57.8 X C40
2025-08-30 19:54:13 C 19 20 01.49 +08 40 49.7 X C40
2025-08-30 21:15:07 B 19 20 01.47 +08 35 19.9 X L99
2025-08-30 21:17:07 B 19 20 01.43 +08 35 11.0 X L99
2025-08-30 21:23:07 B 19 20 01.42 +08 34 47.5 X L99
2025-08-30 21:24:47 B 19 20 01.48 +08 34 41.1 X L99
2025-08-31 17:58:07 C 19 20 07.36 +07 13 18.6 X C40
2025-08-31 18:00:32 C 19 20 07.36 +07 13 09.2 X C40
2025-08-31 18:02:57 C 19 20 07.35 +07 12 59.8 X C40
2025-08-31 18:05:21 C 19 20 07.34 +07 12 50.4 X C40
2025-08-31 18:07:45 C 19 20 07.34 +07 12 41.1 X C40
2025-08-31 18:10:09 C 19 20 07.33 +07 12 31.8 X C40
2025-08-31 18:12:34 C 19 20 07.32 +07 12 22.4 X C40
2025-08-31 18:14:58 C 19 20 07.31 +07 12 13.1 X C40
2025-08-31 18:17:16 C 19 20 07.31 +07 12 04.1 X C40
2025-08-31 18:19:28 C 19 20 07.30 +07 11 55.4 X C40
2025-08-31 18:21:41 C 19 20 07.30 +07 11 46.9 X C40
2025-08-31 18:23:53 C 19 20 07.29 +07 11 38.3 X C40
2025-08-31 19:35:09 C 19 20 07.656 +07 07 50.12 V M22
2025-08-31 19:39:35 C 19 20 07.98 +07 06 44.2 X K83
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)