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
2022-09-01 04:01:37 V 22 19 11.07 +12 43 31.3 V 270
2022-09-01 04:01:37 v 1 238.23504 +36.50771 270
2022-09-01 04:09:26 V 22 19 09.41 +12 43 00.0 V 270
2022-09-01 04:09:26 v 1 238.23504 +36.50771 270
2022-09-01 06:31:00 C 22 18 37.061 +12 34 19.81 V W68
2022-09-01 08:58:29 C 22 18 09.420 +12 23 46.72 V T08
2022-09-01 09:01:06 C 22 18 08.851 +12 23 36.10 V T08
2022-09-01 09:06:21 C 22 18 07.718 +12 23 14.89 V T08
2022-09-01 09:54:26 C 22 17 57.341 +12 20 00.46 V T08
2022-09-01 12:52:05 C 22 17 22.95 +12 07 42.6 W P22
2022-09-01 13:32:05 C 22 17 14.55 +12 05 01.0 W P22
2022-09-01 14:12:04 C 22 17 06.12 +12 02 19.2 W P22
2022-09-01 14:52:04 C 22 16 57.59 +11 59 38.3 W P22
2022-09-01 15:14:46 C 22 16 52.78 +11 58 11.4 V D29
2022-09-01 15:16:03 C 22 16 52.52 +11 58 06.4 V D29
2022-09-01 15:35:08 C 22 16 48.43 +11 56 49.0 V D29
2022-09-01 15:36:25 C 22 16 48.17 +11 56 43.7 V D29
2022-09-01 15:55:30 C 22 16 44.08 +11 55 26.4 V D29
2022-09-01 15:56:46 C 22 16 43.82 +11 55 21.2 V D29
2022-09-01 15:58:34 V 22 16 44.00 +11 55 00.2 V 270
2022-09-01 15:58:34 v 1 103.84311 +51.88084 270
2022-09-01 16:42:49 V 22 16 34.69 +11 52 01.0 V 270
2022-09-01 16:42:49 v 1 103.84311 +51.88084 270
2022-09-01 17:26:08 V 22 16 25.56 +11 49 05.1 V 270
2022-09-01 17:26:08 v 1 103.84311 +51.88084 270
2022-09-01 18:04:39 V 22 16 17.49 +11 46 28.5 V 270
2022-09-01 18:04:39 v 1 103.84311 +51.88084 270
2022-09-01 19:20:41 V 22 16 04.77 +11 41 19.5 V 270
2022-09-01 19:20:41 v 1 004.83116 +47.04033 270
2022-09-01 19:52:27 V 22 15 58.22 +11 39 11.5 V 270
2022-09-01 19:52:27 v 1 004.83116 +47.04033 270
2022-09-01 20:30:29 V 22 15 50.08 +11 36 35.3 V 270
2022-09-01 20:30:29 v 1 006.13031 +48.70282 270
2022-09-01 20:30:44 V 22 15 50.24 +11 36 36.5 V 270
2022-09-01 20:30:44 v 1 004.83116 +47.04033 270
2022-09-01 21:02:38 V 22 15 43.37 +11 34 25.9 V 270
2022-09-01 21:02:38 v 1 006.13031 +48.70282 270
2022-09-01 21:09:38 V 22 15 42.12 +11 33 59.5 V 270
2022-09-01 21:09:38 v 1 004.83116 +47.04033 270
2022-09-01 21:32:14 C 22 15 37.17 +11 32 24.4 V L65
2022-09-01 21:39:35 V 22 15 35.68 +11 31 56.1 V 270
2022-09-01 21:39:35 v 1 006.13031 +48.70282 270
2022-09-01 21:44:08 V 22 15 34.43 +11 31 32.8 V 270
2022-09-01 21:44:08 v 1 006.90683 +44.69673 270
2022-09-01 21:50:16 C 22 15 33.47 +11 31 12.1 V G33
2022-09-01 21:51:57 C 22 15 33.12 +11 31 05.2 V G33
2022-09-01 21:53:38 C 22 15 32.76 +11 30 58.5 V G33
2022-09-01 21:55:19 C 22 15 32.40 +11 30 51.7 V G33
2022-09-01 21:57:00 C 22 15 32.05 +11 30 44.7 V G33
2022-09-01 22:16:02 V 22 15 28.08 +11 29 29.2 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)