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
2025-09-04 18:15:12 C 19 21 09.55 +01 27 51.8 X C40
2025-09-04 18:17:23 C 19 21 09.57 +01 27 44.5 X C40
2025-09-04 18:23:03 C 19 21 09.63 +01 27 25.9 X D04
2025-09-04 18:25:36 C 19 21 09.64 +01 27 17.4 X D04
2025-09-04 18:28:09 C 19 21 09.68 +01 27 08.7 X D04
2025-09-04 18:33:15 C 19 21 09.70 +01 26 51.9 X D04
2025-09-04 18:35:47 C 19 21 09.73 +01 26 44.0 X D04
2025-09-04 18:38:14 C 19 21 09.74 +01 26 35.8 X D04
2025-09-04 18:40:34 C 19 21 09.76 +01 26 28.0 X D04
2025-09-04 18:42:54 C 19 21 09.80 +01 26 20.6 X D04
2025-09-04 18:45:14 C 19 21 09.81 +01 26 12.5 X D04
2025-09-04 20:38:58 C 19 21 11.642 +01 20 00.42 c 233
2025-09-04 20:42:04 C 19 21 11.678 +01 19 50.20 c 233
2025-09-04 20:45:43 C 19 21 11.714 +01 19 38.46 c 233
2025-09-04 20:49:51 C 19 21 11.748 +01 19 24.78 c 233
2025-09-05 00:22:16 C 19 21 14.347 +01 07 58.26 V R17
2025-09-05 00:43:51 C 19 21 14.556 +01 06 48.06 V R17
2025-09-05 01:05:41 C 19 21 14.794 +01 05 37.03 V R17
2025-09-05 01:27:22 C 19 21 15.058 +01 04 26.36 V R17
2025-09-05 18:40:49 C 19 21 34.77 +00 09 11.8 X C40
2025-09-05 18:43:13 C 19 21 34.79 +00 09 04.2 X C40
2025-09-05 18:45:38 C 19 21 34.82 +00 08 56.6 X C40
2025-09-05 18:48:03 C 19 21 34.85 +00 08 48.9 X C40
2025-09-05 18:50:27 C 19 21 34.88 +00 08 41.4 X C40
2025-09-05 18:52:51 C 19 21 34.91 +00 08 33.8 X C40
2025-09-05 18:55:16 C 19 21 34.94 +00 08 26.3 X C40
2025-09-05 18:57:41 C 19 21 34.96 +00 08 18.7 X C40
2025-09-05 18:59:59 C 19 21 34.99 +00 08 11.5 X C40
2025-09-05 19:02:10 C 19 21 35.02 +00 08 04.5 X C40
2025-09-05 19:04:22 C 19 21 35.04 +00 07 57.7 X C40
2025-09-05 19:06:35 C 19 21 35.07 +00 07 50.7 X C40
2025-09-05 19:18:55 C 19 21 35.19 +00 07 11.7 X D04
2025-09-05 19:21:28 C 19 21 35.25 +00 07 03.9 X D04
2025-09-05 19:24:02 C 19 21 35.27 +00 06 55.5 X D04
2025-09-05 19:26:34 C 19 21 35.29 +00 06 47.6 X D04
2025-09-05 19:29:08 C 19 21 35.33 +00 06 39.5 X D04
2025-09-05 19:31:42 C 19 21 35.38 +00 06 31.5 X D04
2025-09-05 19:34:16 C 19 21 35.38 +00 06 23.3 X D04
2025-09-05 19:36:49 C 19 21 35.42 +00 06 15.5 X D04
2025-09-05 19:41:36 C 19 21 35.49 +00 06 00.7 X D04
2025-09-05 19:43:56 C 19 21 35.53 +00 05 53.3 X D04
2025-09-05 20:31:14 C 19 21 36.85 +00 03 25.3 X K83
2025-09-05 20:35:29 C 19 21 36.91 +00 03 11.7 X K83
2025-09-05 20:39:22 C 19 21 36.93 +00 02 59.3 X K83
2025-09-05 21:01:37 C 19 21 37.382 +00 01 46.42 Z C23
2025-09-05 21:02:47 C 19 21 37.438 +00 01 43.00 Z C23
2025-09-05 21:13:14 C 19 21 37.550 +00 01 10.27 Z C23
2025-09-05 21:52:23 C 19 21 38.537 -00 00 41.83 V R17
2025-09-05 21:52:50 B 19 21 38.539 -00 00 43.70 X J51
2025-09-05 22:08:28 B 19 21 38.693 -00 01 32.38 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)