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
2025-08-21 00:05:41 C 19 23 52.43 +27 33 46.7 834
2025-08-21 00:49:01 C 19 23 50.20 +27 29 49.5 834
2025-08-21 01:50:51 B 19 23 47.12 +27 23 54.9 Z X33
2025-08-21 01:53:23 B 19 23 46.97 +27 23 41.4 Z X33
2025-08-21 01:55:41 B 19 23 46.81 +27 23 27.9 Z X33
2025-08-21 19:51:43 C 19 23 07.81 +25 45 28.1 X C40
2025-08-21 19:54:10 C 19 23 07.70 +25 45 14.8 X C40
2025-08-21 19:56:34 C 19 23 07.59 +25 45 01.8 X C40
2025-08-21 19:58:59 C 19 23 07.49 +25 44 48.8 X C40
2025-08-21 20:01:24 C 19 23 07.38 +25 44 35.8 X C40
2025-08-21 20:03:48 C 19 23 07.28 +25 44 22.8 X C40
2025-08-21 20:06:13 C 19 23 07.17 +25 44 09.7 X C40
2025-08-21 20:08:38 C 19 23 07.06 +25 43 56.6 X C40
2025-08-21 20:10:57 C 19 23 06.96 +25 43 44.2 X C40
2025-08-21 20:13:09 C 19 23 06.87 +25 43 32.2 X C40
2025-08-21 20:15:21 C 19 23 06.77 +25 43 20.3 X C40
2025-08-21 20:17:33 C 19 23 06.67 +25 43 08.3 X C40
2025-08-21 21:49:31 C 19 23 04.063 +25 34 49.58 Z C23
2025-08-21 22:33:24 C 19 23 02.177 +25 30 53.14 Z C23
2025-08-21 22:59:19 B 19 23 01.118 +25 28 42.10 V R61
2025-08-21 23:06:50 C 19 23 00.790 +25 27 52.85 Z C23
2025-08-21 23:09:22 B 19 23 00.672 +25 27 47.95 V R61
2025-08-21 23:20:54 B 19 23 00.168 +25 26 45.64 V R61
2025-08-21 23:58:27 B 19 23 00.88 +25 24 03.7 X X76
2025-08-22 00:00:43 B 19 23 00.77 +25 23 51.5 X X76
2025-08-22 00:03:16 B 19 23 00.64 +25 23 38.0 X X76
2025-08-22 19:00:12 C 19 22 24.87 +23 42 00.7 V M31
2025-08-22 19:00:35 C 19 22 24.84 +23 41 58.4 V M31
2025-08-22 19:00:59 C 19 22 24.83 +23 41 56.4 V M31
2025-08-22 19:01:24 C 19 22 24.81 +23 41 53.8 V M31
2025-08-22 19:01:50 C 19 22 24.80 +23 41 51.9 V M31
2025-08-22 19:02:14 C 19 22 24.79 +23 41 49.8 V M31
2025-08-22 19:02:39 C 19 22 24.77 +23 41 47.5 V M31
2025-08-22 19:03:01 C 19 22 24.75 +23 41 45.4 V M31
2025-08-22 19:03:25 C 19 22 24.73 +23 41 43.4 V M31
2025-08-22 19:03:50 C 19 22 24.72 +23 41 41.1 V M31
2025-08-22 19:04:14 C 19 22 24.69 +23 41 39.2 V M31
2025-08-22 19:28:38 C 19 22 23.31 +23 39 42.0 X C40
2025-08-22 19:31:03 C 19 22 23.21 +23 39 29.2 X C40
2025-08-22 19:33:27 C 19 22 23.12 +23 39 16.6 X C40
2025-08-22 19:35:52 C 19 22 23.02 +23 39 03.8 X C40
2025-08-22 19:38:16 C 19 22 22.93 +23 38 51.1 X C40
2025-08-22 19:40:41 C 19 22 22.83 +23 38 38.4 X C40
2025-08-22 19:43:06 C 19 22 22.74 +23 38 25.7 X C40
2025-08-22 19:45:31 C 19 22 22.64 +23 38 13.0 X C40
2025-08-22 19:47:48 C 19 22 22.55 +23 38 00.7 X C40
2025-08-22 19:50:02 C 19 22 22.46 +23 37 49.0 X C40
2025-08-22 19:52:14 C 19 22 22.38 +23 37 37.4 X C40
2025-08-22 19:54:27 C 19 22 22.28 +23 37 25.9 X C40
2025-08-22 21:37:07 B 19 22 20.671 +23 28 39.32 X J51
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)