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
2022-09-06 16:34:50 C 21 53 45.578 +03 45 55.08 V N44
2022-09-06 16:38:50 C 21 53 44.834 +03 45 39.31 V N44
2022-09-06 16:39:20 C 21 53 44.737 +03 45 37.22 V N44
2022-09-06 16:39:50 C 21 53 44.651 +03 45 35.26 V N44
2022-09-06 16:40:20 C 21 53 44.553 +03 45 33.21 V N44
2022-09-06 16:40:50 C 21 53 44.453 +03 45 31.26 V N44
2022-09-06 16:41:20 C 21 53 44.356 +03 45 29.23 V N44
2022-09-06 16:41:26 C 21 53 45.44 +03 45 23.9 V C40
2022-09-06 16:41:50 C 21 53 44.264 +03 45 27.35 V N44
2022-09-06 16:42:06 C 21 53 45.32 +03 45 21.3 V C40
2022-09-06 16:42:20 C 21 53 44.170 +03 45 25.34 V N44
2022-09-06 16:42:50 C 21 53 44.073 +03 45 23.12 V N44
2022-09-06 16:43:20 C 21 53 43.974 +03 45 21.10 V N44
2022-09-06 16:43:28 C 21 53 45.07 +03 45 15.8 V C40
2022-09-06 16:43:50 C 21 53 43.890 +03 45 19.31 V N44
2022-09-06 16:44:20 C 21 53 43.797 +03 45 17.36 V N44
2022-09-06 16:44:50 C 21 53 43.707 +03 45 15.33 V N44
2022-09-06 16:45:20 C 21 53 43.612 +03 45 13.38 V N44
2022-09-06 16:45:50 C 21 53 43.504 +03 45 11.32 V N44
2022-09-06 16:46:13 C 21 53 44.56 +03 45 04.8 V C40
2022-09-06 16:46:20 C 21 53 43.422 +03 45 09.30 V N44
2022-09-06 16:50:19 C 21 53 43.81 +03 44 48.6 V C40
2022-09-06 17:02:50 C 21 53 41.51 +03 43 58.9 V C40
2022-09-06 17:03:32 C 21 53 41.38 +03 43 56.2 V C40
2022-09-06 17:04:54 C 21 53 41.13 +03 43 50.7 V C40
2022-09-06 17:08:19 C 21 53 40.50 +03 43 37.1 V C40
2022-09-06 17:14:29 C 21 53 39.36 +03 43 12.5 V C40
2022-09-06 17:15:11 C 21 53 39.24 +03 43 09.9 V C40
2022-09-06 17:15:51 C 21 53 39.11 +03 43 07.2 V C40
2022-09-06 17:19:18 C 21 53 38.48 +03 42 53.5 V C40
2022-09-06 17:22:01 C 21 53 37.97 +03 42 42.7 V C40
2022-09-06 17:24:05 C 21 53 37.60 +03 42 34.4 V C40
2022-09-06 17:24:45 C 21 53 37.47 +03 42 31.8 V C40
2022-09-06 17:26:50 C 21 53 37.09 +03 42 23.6 V C40
2022-09-06 17:28:12 C 21 53 36.83 +03 42 18.1 V C40
2022-09-06 17:28:52 C 21 53 36.71 +03 42 15.4 V C40
2022-09-06 17:30:14 C 21 53 36.46 +03 42 10.0 V C40
2022-09-06 17:32:59 C 21 53 35.95 +03 41 59.1 V C40
2022-09-06 17:36:24 C 21 53 35.32 +03 41 45.5 V C40
2022-09-06 17:37:06 C 21 53 35.19 +03 41 42.7 V C40
2022-09-06 17:37:46 C 21 53 35.07 +03 41 40.0 V C40
2022-09-06 17:41:53 C 21 53 34.31 +03 41 23.7 V C40
2022-09-06 17:42:35 C 21 53 34.18 +03 41 21.0 V C40
2022-09-06 17:45:18 C 21 53 33.67 +03 41 10.1 V C40
2022-09-06 17:48:03 C 21 53 33.17 +03 40 59.2 V C40
2022-09-06 17:50:07 C 21 53 32.78 +03 40 51.0 V C40
2022-09-06 17:51:29 C 21 53 32.53 +03 40 45.5 V C40
2022-09-06 17:54:55 C 21 53 31.89 +03 40 31.9 V C40
2022-09-06 17:55:35 C 21 53 31.77 +03 40 29.2 V C40
2022-09-06 17:59:41 C 21 53 31.01 +03 40 12.9 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)