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
2019-08-26 10:44:46 C 01 17 09.33 +18 56 29.8 V 703
2019-08-26 10:52:23 C 01 17 08.80 +18 56 17.4 V 703
2019-08-26 10:54:12 C 01 17 10.24 +18 56 19.6 V T08
2019-08-26 10:58:16 C 01 17 09.96 +18 56 13.1 V T08
2019-08-26 11:24:26 C 01 17 08.16 +18 55 30.9 V T08
2019-08-26 11:31:54 C 01 17 07.64 +18 55 18.8 V T08
2019-08-27 00:56:25 C 01 16 16.94 +18 32 47.7 q 160
2019-08-27 00:59:22 C 01 16 16.72 +18 32 42.7 q 160
2019-08-27 01:02:17 C 01 16 16.52 +18 32 37.8 q 160
2019-08-27 01:13:07 C 01 16 15.09 +18 32 19.1 V 094
2019-08-27 01:19:29 C 01 16 14.64 +18 32 08.4 V 094
2019-08-27 01:32:13 C 01 16 13.72 +18 31 46.7 V 094
2019-08-27 01:38:34 C 01 16 13.27 +18 31 35.9 V 094
2019-08-28 01:28:19 C 01 14 38.05 +17 50 05.1 V 094
2019-08-28 01:34:41 C 01 14 37.57 +17 49 53.9 V 094
2019-08-28 01:41:04 C 01 14 37.06 +17 49 42.2 V 094
2019-08-28 01:47:26 C 01 14 36.58 +17 49 30.6 V 094
2019-08-28 06:30:17 C 01 14 19.04 +17 41 01.0 q U76
2019-08-28 07:20:23 C 01 14 15.31 +17 39 31.8 q U76
2019-08-28 07:25:43 C 01 14 14.88 +17 39 21.9 q U76
2019-08-28 08:20:51 C 01 14 10.65 +17 37 43.7 q U76
2019-08-28 10:47:14 C 01 14 00.48 +17 33 24.4 V T05
2019-08-28 10:52:35 C 01 14 00.06 +17 33 14.6 V T05
2019-08-28 11:21:50 C 01 13 57.73 +17 32 21.7 V T05
2019-08-28 11:43:20 C 01 13 56.01 +17 31 42.6 V T05
2019-08-29 01:15:10 C 01 12 55.50 +17 06 15.5 V 094
2019-08-29 01:23:38 C 01 12 54.82 +17 05 59.7 V 094
2019-08-29 01:40:30 C 01 12 53.43 +17 05 27.5 V 094
2019-08-29 01:48:57 C 01 12 52.75 +17 05 11.5 V 094
2019-08-30 00:13:00 C 01 11 09.50 +16 21 33.3 V 094
2019-08-30 00:21:25 C 01 11 08.77 +16 21 16.8 V 094
2019-08-30 00:38:19 C 01 11 07.28 +16 20 42.5 V 094
2019-08-30 00:46:46 C 01 11 06.59 +16 20 26.6 V 094
2019-08-30 01:22:33 C 01 11 04.12 +16 19 14.9 q 160
2019-08-30 01:24:19 C 01 11 03.97 +16 19 11.5 q 160
2019-08-30 01:26:04 C 01 11 03.82 +16 19 07.9 q 160
2019-08-30 09:35:59 C 01 10 24.03 +16 02 42.6 V 703
2019-08-30 09:43:36 C 01 10 23.36 +16 02 26.5 V 703
2019-08-30 09:51:12 C 01 10 22.57 +16 02 11.2 V 703
2019-08-30 09:58:49 C 01 10 21.88 +16 01 55.3 V 703
2019-08-30 22:03:11 C 01 09 22.72 +15 36 40.4 V K85
2019-08-30 22:45:28 C 01 09 18.81 +15 35 12.9 V G34
2019-08-30 22:47:41 C 01 09 18.59 +15 35 08.3 V G34
2019-08-30 22:49:55 C 01 09 18.40 +15 35 03.5 V G34
2019-08-30 22:53:56 C 01 09 18.04 +15 34 55.6 V G34
2019-08-30 23:04:45 C 01 09 17.24 +15 34 32.2 V K85
2019-08-31 00:37:32 C 01 09 08.71 +15 31 21.9 q 160
2019-08-31 00:40:27 C 01 09 08.44 +15 31 15.8 q 160
2019-08-31 00:43:21 C 01 09 08.17 +15 31 09.7 q 160
2019-09-01 10:35:09 C 01 06 06.33 +14 16 54.3 V T05
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)