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
2019-09-01 10:49:34 C 01 06 04.85 +14 16 21.6 V T05
2019-09-01 10:54:35 C 01 06 04.32 +14 16 10.3 V T05
2019-09-01 11:05:44 C 01 06 03.17 +14 15 45.0 V T05
2019-09-01 15:23:47 C 01 05 36.17 +14 05 51.0 V T05
2019-09-04 01:31:50 C 00 59 39.39 +11 42 29.4 q 160
2019-09-04 01:34:49 C 00 59 39.03 +11 42 21.7 q 160
2019-09-04 01:37:46 C 00 59 38.68 +11 42 14.1 q 160
2019-09-05 01:51:34 C 00 56 53.55 +10 37 06.1 q 160
2019-09-05 01:54:32 C 00 56 53.18 +10 36 57.9 q 160
2019-09-05 01:57:27 C 00 56 52.88 +10 36 50.4 q 160
2019-09-05 08:38:59 C 00 56 06.36 +10 18 22.2 V 703
2019-09-05 08:46:33 C 00 56 05.39 +10 18 01.1 V 703
2019-09-05 08:54:08 C 00 56 04.41 +10 17 39.9 V 703
2019-09-05 09:01:42 C 00 56 03.44 +10 17 18.8 V 703
2019-09-05 14:16:57 C 00 55 24.40 +10 02 39.6 V T05
2019-09-05 14:21:43 C 00 55 23.79 +10 02 26.0 V T05
2019-09-05 14:31:10 C 00 55 22.56 +10 01 59.2 V T05
2019-09-05 14:46:29 C 00 55 20.58 +10 01 15.6 V T05
2019-09-05 15:25:52 C 00 55 15.52 +09 59 23.4 V T05
2019-09-05 22:27:16 C 00 54 27.49 +09 39 03.1 V K85
2019-09-05 22:29:03 C 00 54 27.27 +09 38 57.8 V K85
2019-09-08 00:03:40 C 00 48 02.95 +07 09 32.6 q 160
2019-09-08 00:06:39 C 00 48 02.62 +07 09 23.0 q 160
2019-09-08 00:09:35 C 00 48 02.10 +07 09 13.7 q 160
2019-09-08 14:28:07 C 00 46 01.85 +06 23 41.2 V T05
2019-09-08 14:32:47 C 00 46 01.16 +06 23 26.1 V T05
2019-09-08 14:40:24 C 00 46 00.02 +06 23 01.2 V T05
2019-09-08 14:59:06 C 00 45 57.24 +06 22 00.4 V T05
2019-09-08 21:20:28 C 00 45 07.00 +06 00 56.9 V K85
2019-09-08 21:30:33 C 00 45 05.55 +06 00 24.1 V K85
2019-09-10 06:05:52 C 00 40 19.12 +04 10 36.6 u H21
2019-09-10 06:08:23 C 00 40 18.72 +04 10 28.0 u H21
2019-09-10 06:10:54 C 00 40 18.31 +04 10 19.3 u H21
2019-09-10 06:13:25 C 00 40 17.91 +04 10 10.4 u H21
2019-09-10 06:15:56 C 00 40 17.50 +04 10 01.8 u H21
2019-09-10 06:18:28 C 00 40 17.10 +04 09 53.1 u H21
2019-09-10 06:20:59 C 00 40 16.70 +04 09 44.3 u H21
2019-09-10 06:23:30 C 00 40 16.29 +04 09 35.6 u H21
2019-09-10 06:26:01 C 00 40 15.89 +04 09 26.9 u H21
2019-09-10 06:28:32 C 00 40 15.48 +04 09 18.1 u H21
2019-09-10 06:31:03 C 00 40 15.08 +04 09 09.4 u H21
2019-09-10 06:33:34 C 00 40 14.68 +04 09 00.7 u H21
2019-09-10 06:36:05 C 00 40 14.27 +04 08 52.0 u H21
2019-09-10 06:38:37 C 00 40 13.87 +04 08 43.2 u H21
2019-09-10 06:41:08 C 00 40 13.46 +04 08 34.5 u H21
2019-09-10 06:43:39 C 00 40 13.06 +04 08 25.8 u H21
2019-09-10 06:47:12 C 00 40 12.49 +04 08 13.5 u H21
2019-09-10 11:38:32 C 00 39 28.19 +03 51 33.0 V T08
2019-09-10 11:42:48 C 00 39 27.49 +03 51 18.0 V T08
2019-09-10 11:56:07 C 00 39 25.30 +03 50 31.5 V T08
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)