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
2022-08-21 00:16:16 v 1 024.63076 +60.79185 270
2022-08-21 00:58:26 C 23 15 30.77 +28 24 45.9 t B66
2022-08-21 11:45:09 C 23 13 16.874 +27 54 29.48 V T08
2022-08-21 11:49:12 C 23 13 15.984 +27 54 17.89 V T08
2022-08-21 12:02:04 C 23 13 13.130 +27 53 40.85 V T08
2022-08-21 12:46:55 C 23 13 03.218 +27 51 31.18 V T08
2022-08-22 10:08:54 C 23 08 37.361 +26 48 38.02 V T05
2022-08-22 10:13:28 C 23 08 36.341 +26 48 24.30 V T05
2022-08-22 10:21:00 C 23 08 34.668 +26 48 01.91 V T05
2022-08-22 11:11:48 C 23 08 23.321 +26 45 29.66 V T05
2022-08-22 17:56:49 C 23 06 59.17 +26 24 30.5 q 168
2022-08-22 19:56:36 C 23 06 34.59 +26 18 22.9 V C23
2022-08-22 20:01:14 C 23 06 33.60 +26 18 08.8 V C23
2022-08-22 20:06:26 C 23 06 32.48 +26 17 53.2 V C23
2022-08-22 20:31:55 C 23 06 25.42 +26 16 38.9 q 168
2022-08-22 22:53:58 C 23 05 54.36 +26 09 20.5 q 168
2022-08-22 23:14:22 C 23 05 51.497 +26 08 23.24 V K74
2022-08-22 23:16:06 C 23 05 51.108 +26 08 17.92 V K74
2022-08-22 23:17:50 C 23 05 50.734 +26 08 12.66 V K74
2022-08-22 23:19:33 C 23 05 50.347 +26 08 07.33 V K74
2022-08-22 23:21:15 C 23 05 49.982 +26 08 02.18 V K74
2022-08-22 23:22:59 C 23 05 49.582 +26 07 56.68 V K74
2022-08-23 21:06:14 C 23 01 14.41 +24 59 23.0 V L65
2022-08-23 22:34:24 C 23 00 55.05 +24 54 41.6 V L65
2022-08-24 00:54:50 C 23 00 23.98 +24 47 08.7 V L65
2022-08-24 11:11:04 C 22 58 13.001 +24 14 00.17 V T08
2022-08-24 11:20:48 C 22 58 10.795 +24 13 27.95 V T08
2022-08-24 11:25:25 C 22 58 09.749 +24 13 12.76 V T08
2022-08-24 11:40:47 C 22 58 06.262 +24 12 21.85 V T08
2022-08-24 18:07:53 C 22 56 45.21 +23 50 26.5 q 168
2022-08-24 20:01:35 C 22 56 21.67 +23 44 06.0 V C23
2022-08-24 20:06:31 C 22 56 20.59 +23 43 49.6 V C23
2022-08-24 20:07:50 V 22 56 20.55 +23 43 48.9 V 270
2022-08-24 20:07:50 v 1 005.51473 +44.40828 270
2022-08-24 20:07:51 V 22 56 20.50 +23 43 49.6 V 270
2022-08-24 20:07:51 v 1 000.58000 +45.17000 270
2022-08-24 20:11:28 C 22 56 19.52 +23 43 33.5 V C23
2022-08-24 20:23:51 V 22 56 17.03 +23 42 56.3 V 270
2022-08-24 20:23:51 v 1 005.51473 +44.40828 270
2022-08-24 20:27:18 V 22 56 16.26 +23 42 45.6 V 270
2022-08-24 20:27:18 v 1 000.58000 +45.17000 270
2022-08-24 20:30:53 C 22 56 13.63 +23 42 30.5 q 168
2022-08-24 20:39:44 V 22 56 13.54 +23 42 04.1 V 270
2022-08-24 20:39:44 v 1 005.51473 +44.40828 270
2022-08-24 20:53:34 V 22 56 10.49 +23 41 18.3 V 270
2022-08-24 20:53:34 v 1 000.58000 +45.17000 270
2022-08-24 21:01:53 V 22 56 08.69 +23 40 50.9 V 270
2022-08-24 21:01:53 v 1 005.51473 +44.40828 270
2022-08-24 21:04:45 C 22 56 07.70 +23 40 36.3 V L65
2022-08-24 21:12:53 V 22 56 06.24 +23 40 14.5 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)