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
2003-07-29 21:14:07 C 23 12 00.19 +64 07 15.9 c 196
2003-07-29 21:47:59 C 23 11 45.26 +64 06 19.4 c 196
2003-07-29 22:04:19 C 23 11 38.06 +64 05 52.5 c 196
2003-07-31 23:03:38 C 22 50 43.68 +62 30 11.5 c 127
2003-07-31 23:08:27 C 22 50 41.59 +62 30 01.5 c 127
2003-07-31 23:12:34 C 22 50 39.83 +62 29 52.8 c 127
2003-07-31 23:16:36 C 22 50 38.11 +62 29 44.4 c 127
2003-07-31 23:20:55 C 22 50 36.25 +62 29 35.7 c 127
2003-08-01 00:07:00 C 22 50 16.38 +62 28 02.1 c 204
2003-08-01 00:07:44 C 22 50 16.09 +62 28 00.7 c 204
2003-08-01 00:08:26 C 22 50 15.78 +62 27 59.2 c 204
2003-08-01 00:09:09 C 22 50 15.45 +62 27 57.5 c 204
2003-08-01 00:09:52 C 22 50 15.17 +62 27 56.1 c 204
2003-08-01 00:19:51 C 22 50 10.83 +62 27 34.9 c 204
2003-08-01 00:27:53 C 22 50 07.36 +62 27 18.0 c 204
2003-08-01 21:06:59 C 22 41 39.79 +61 40 39.3 c 196
2003-08-01 21:23:35 C 22 41 32.96 +61 39 57.8 c J93
2003-08-01 21:27:24 C 22 41 31.33 +61 39 49.2 c J93
2003-08-01 21:27:40 C 22 41 31.26 +61 39 52.9 c 196
2003-08-01 21:29:26 C 22 41 30.56 +61 39 44.7 c J93
2003-08-01 21:31:30 C 22 41 29.74 +61 39 39.9 c J93
2003-08-01 21:48:18 C 22 41 22.66 +61 39 07.1 c 196
2003-08-02 23:44:07 C 22 30 58.77 +60 35 50.1 c J93
2003-08-02 23:46:09 C 22 30 58.07 +60 35 45.4 c J93
2003-08-02 23:48:12 C 22 30 57.17 +60 35 40.2 c J93
2003-08-03 21:51:50 C 22 22 25.69 +59 37 17.9 d 170
2003-08-03 21:53:15 C 22 22 25.13 +59 37 14.3 d 170
2003-08-03 22:33:04 C 22 22 08.64 +59 35 24.1 c 127
2003-08-03 22:37:35 C 22 22 06.84 +59 35 12.1 c 127
2003-08-03 22:44:03 C 22 22 04.34 +59 34 54.7 c 127
2003-08-03 22:51:03 C 22 22 01.57 +59 34 35.8 c 127
2003-08-06 00:34:07 C 22 03 44.51 +57 07 30.3 c J93
2003-08-06 00:36:11 C 22 03 44.00 +57 07 24.7 c J93
2003-08-06 00:38:13 C 22 03 43.15 +57 07 18.4 c J93
2003-08-06 13:03:44 C 21 59 25.37 +56 27 18.9 m 379
2003-08-06 13:06:09 C 21 59 24.34 +56 27 10.5 m 379
2003-08-06 13:08:28 C 21 59 23.57 +56 27 04.7 m 379
2003-08-06 13:10:50 C 21 59 22.78 +56 26 57.3 m 379
2003-08-06 13:13:43 C 21 59 21.60 +56 26 46.8 m 379
2003-08-06 13:15:53 C 21 59 20.89 +56 26 40.5 m 379
2003-08-06 13:18:02 C 21 59 20.00 +56 26 32.7 m 379
2003-08-06 13:20:10 C 21 59 19.13 +56 26 26.1 m 379
2003-08-06 13:22:20 C 21 59 18.60 +56 26 20.3 m 379
2003-08-09 14:04:39 C 21 35 46.85 +52 05 55.8 m 379
2003-08-09 14:06:06 C 21 35 46.36 +52 05 50.4 m 379
2003-08-09 14:09:11 C 21 35 45.38 +52 05 38.5 m 379
2003-08-09 14:11:30 C 21 35 44.65 +52 05 29.4 m 379
2003-08-09 14:12:39 C 21 35 44.28 +52 05 25.4 m 379
2003-08-09 14:13:48 C 21 35 43.89 +52 05 20.5 m 379
2003-08-09 14:14:57 C 21 35 43.55 +52 05 16.4 m 379
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)