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
2022-08-30 21:44:35 C 22 25 22.481 +14 44 55.76 V 089
2022-08-30 21:47:27 C 22 25 21.853 +14 44 44.21 V 089
2022-08-30 21:50:19 C 22 25 21.234 +14 44 32.72 V 089
2022-08-30 21:53:11 C 22 25 20.615 +14 44 21.47 V 089
2022-08-30 21:56:03 C 22 25 19.989 +14 44 09.97 V 089
2022-08-30 21:58:55 C 22 25 19.366 +14 43 58.51 V 089
2022-08-30 22:01:47 C 22 25 18.728 +14 43 47.08 V 089
2022-08-30 22:04:39 C 22 25 18.118 +14 43 35.62 V 089
2022-08-30 22:07:31 C 22 25 17.501 +14 43 24.50 V 089
2022-08-30 22:17:08 C 22 25 16.24 +14 42 41.8 V L65
2022-08-30 23:16:52 C 22 25 03.68 +14 38 45.8 q J69
2022-08-30 23:22:32 C 22 25 02.46 +14 38 23.2 q J69
2022-08-30 23:28:12 C 22 25 01.24 +14 38 00.6 q J69
2022-08-30 23:33:52 C 22 25 00.02 +14 37 38.0 q J69
2022-08-30 23:53:50 C 22 24 55.37 +14 36 17.0 V L65
2022-08-31 03:17:55 C 22 24 13.87 +14 23 26.6 q X33
2022-08-31 03:25:00 C 22 24 12.32 +14 22 58.4 q X33
2022-08-31 03:32:16 C 22 24 10.71 +14 22 29.5 q X33
2022-08-31 09:20:10 C 22 22 59.292 +13 58 59.99 V T08
2022-08-31 09:24:07 C 22 22 58.421 +13 58 44.11 V T08
2022-08-31 09:33:18 C 22 22 56.407 +13 58 07.43 V T08
2022-08-31 10:10:17 C 22 22 48.300 +13 55 39.43 V T08
2022-08-31 10:26:06 C 22 22 44.866 +13 54 35.06 V T05
2022-08-31 10:30:50 C 22 22 43.826 +13 54 16.06 V T05
2022-08-31 10:50:44 V 22 22 40.77 +13 53 39.3 V 270
2022-08-31 10:50:44 v 1 175.46569 -37.91877 270
2022-08-31 10:55:08 C 22 22 38.508 +13 52 38.57 V T05
2022-08-31 10:56:09 V 22 22 39.63 +13 53 16.5 V 270
2022-08-31 10:56:09 v 1 175.46569 -37.91877 270
2022-08-31 11:06:33 V 22 22 37.36 +13 52 35.5 V 270
2022-08-31 11:06:33 v 1 175.46569 -37.91877 270
2022-08-31 11:12:12 V 22 22 36.12 +13 52 12.9 V 270
2022-08-31 11:12:12 v 1 175.46569 -37.91877 270
2022-08-31 11:36:32 C 22 22 29.465 +13 49 52.03 V T05
2022-08-31 12:16:05 C 22 22 24.38 +13 46 55.2 W P22
2022-08-31 12:56:05 C 22 22 15.88 +13 44 15.3 W P22
2022-08-31 13:36:04 C 22 22 07.33 +13 41 36.5 W P22
2022-08-31 16:39:18 C 22 21 29.586 +13 29 22.21 V N44
2022-08-31 16:39:45 C 22 21 29.478 +13 29 20.36 V N44
2022-08-31 16:40:12 C 22 21 29.381 +13 29 18.44 V N44
2022-08-31 16:40:39 C 22 21 29.290 +13 29 16.66 V N44
2022-08-31 16:41:06 C 22 21 29.192 +13 29 14.83 V N44
2022-08-31 16:41:33 C 22 21 29.100 +13 29 12.93 V N44
2022-08-31 16:42:00 C 22 21 28.997 +13 29 11.32 V N44
2022-08-31 16:42:27 C 22 21 28.903 +13 29 09.53 V N44
2022-08-31 16:42:54 C 22 21 28.803 +13 29 07.66 V N44
2022-08-31 16:43:21 C 22 21 28.708 +13 29 06.02 V N44
2022-08-31 16:43:48 C 22 21 28.604 +13 29 04.04 V N44
2022-08-31 16:44:15 C 22 21 28.509 +13 29 02.36 V N44
2022-08-31 16:44:42 C 22 21 28.415 +13 29 00.54 V N44
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)