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
2022-09-08 17:29:36 C 21 45 21.72 +00 34 19.6 V C40
2022-09-08 17:30:19 C 21 45 21.59 +00 34 16.8 V C40
2022-09-08 17:31:43 C 21 45 21.35 +00 34 11.4 V C40
2022-09-08 17:34:11 C 21 45 20.92 +00 34 02.0 V C40
2022-09-08 17:34:33 C 21 45 20.86 +00 34 00.6 V C40
2022-09-08 17:35:15 C 21 45 20.74 +00 33 57.9 V C40
2022-09-08 17:36:19 C 21 45 20.55 +00 33 53.8 V C40
2022-09-08 17:37:01 C 21 45 20.43 +00 33 51.1 V C40
2022-09-08 17:37:44 C 21 45 20.31 +00 33 48.4 V C40
2022-09-08 17:38:04 C 21 45 20.25 +00 33 47.1 V C40
2022-09-08 17:40:12 C 21 45 19.88 +00 33 39.0 V C40
2022-09-08 17:44:26 C 21 45 19.15 +00 33 22.7 V C40
2022-09-08 17:44:46 C 21 45 19.09 +00 33 21.4 V C40
2022-09-08 17:47:16 C 21 45 18.65 +00 33 11.8 V C40
2022-09-08 17:47:36 C 21 45 18.60 +00 33 10.6 V C40
2022-09-08 17:48:19 C 21 45 18.47 +00 33 07.8 V C40
2022-09-08 17:48:40 C 21 45 18.41 +00 33 06.4 V C40
2022-09-08 17:49:01 C 21 45 18.35 +00 33 05.1 V C40
2022-09-08 17:51:10 C 21 45 17.98 +00 32 56.9 V C40
2022-09-08 17:51:31 C 21 45 17.92 +00 32 55.6 V C40
2022-09-08 17:51:51 C 21 45 17.86 +00 32 54.3 V C40
2022-09-08 17:52:12 C 21 45 17.80 +00 32 52.7 V C40
2022-09-08 17:52:34 C 21 45 17.74 +00 32 51.5 V C40
2022-09-08 17:52:54 C 21 45 17.67 +00 32 50.2 V C40
2022-09-08 17:53:15 C 21 45 17.61 +00 32 48.9 V C40
2022-09-08 17:54:19 C 21 45 17.43 +00 32 44.8 V C40
2022-09-08 17:54:41 C 21 45 17.37 +00 32 43.4 V C40
2022-09-08 17:58:33 C 21 45 16.70 +00 32 28.5 V C40
2022-09-08 17:59:15 C 21 45 16.57 +00 32 25.9 V C40
2022-09-08 17:59:36 C 21 45 16.51 +00 32 24.5 V C40
2022-09-08 17:59:58 C 21 45 16.45 +00 32 23.2 V C40
2022-09-08 18:00:19 C 21 45 16.39 +00 32 21.8 V C40
2022-09-08 18:02:05 C 21 45 16.08 +00 32 15.1 V C40
2022-09-08 18:02:26 C 21 45 16.02 +00 32 13.7 V C40
2022-09-08 18:03:09 C 21 45 15.90 +00 32 10.9 V C40
2022-09-08 18:05:16 C 21 45 15.53 +00 32 02.8 V C40
2022-09-08 18:07:00 C 21 45 15.23 +00 31 56.2 V C40
2022-09-08 18:07:22 C 21 45 15.16 +00 31 54.8 V C40
2022-09-08 18:07:43 C 21 45 15.10 +00 31 53.4 V C40
2022-09-08 18:08:04 C 21 45 15.04 +00 31 52.1 V C40
2022-09-08 18:15:39 C 21 45 13.72 +00 31 23.0 V C40
2022-09-08 18:15:59 C 21 45 13.66 +00 31 21.6 V C40
2022-09-08 18:16:22 C 21 45 13.60 +00 31 20.3 V C40
2022-09-08 18:16:43 C 21 45 13.54 +00 31 18.9 V C40
2022-09-08 18:17:03 C 21 45 13.48 +00 31 17.6 V C40
2022-09-08 18:18:06 C 21 45 13.30 +00 31 13.6 V C40
2022-09-08 18:18:49 C 21 45 13.17 +00 31 10.9 V C40
2022-09-08 18:19:09 C 21 45 13.11 +00 31 09.5 V C40
2022-09-08 18:19:53 C 21 45 12.99 +00 31 06.7 V C40
2022-09-08 18:20:13 C 21 45 12.93 +00 31 05.5 V C40
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)