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
2022-10-17 00:48:19 C 20 49 59.160 -29 23 15.54 V W68
2022-10-17 01:02:48 C 20 49 59.297 -29 23 25.40 V W68
2022-10-18 01:03:56 C 20 50 23.196 -29 39 36.47 V W68
2022-10-18 01:05:53 C 20 50 23.239 -29 39 37.73 V W68
2022-10-18 01:11:12 C 20 50 23.282 -29 39 41.29 V W68
2022-10-18 01:11:51 C 20 50 23.290 -29 39 41.62 V W68
2022-10-18 01:17:05 C 20 50 23.352 -29 39 45.00 V W68
2022-10-18 01:21:04 C 20 50 23.414 -29 39 47.56 V W68
2022-10-18 01:31:34 C 20 50 23.508 -29 39 54.29 V W68
2022-10-18 01:36:12 C 20 50 23.592 -29 39 57.17 V W68
2022-10-19 01:51:36 C 20 50 51.976 -29 55 52.86 V 703
2022-10-19 01:59:50 C 20 50 52.058 -29 55 57.83 V 703
2022-10-19 02:08:04 C 20 50 52.177 -29 56 03.19 V 703
2022-10-19 02:16:18 C 20 50 52.303 -29 56 07.91 V 703
2022-10-19 18:28:14 C 20 51 12.098 -30 05 47.51 V M22
2022-10-19 18:31:42 C 20 51 12.137 -30 05 49.78 V M22
2022-10-19 18:38:55 C 20 51 12.254 -30 05 54.02 V M22
2022-10-19 18:58:44 C 20 51 12.554 -30 06 05.87 V M22
2022-10-21 01:17:13 C 20 51 53.897 -30 23 58.56 V W68
2022-10-21 01:21:48 C 20 51 53.988 -30 24 01.19 V W68
2022-10-21 01:29:43 C 20 51 54.118 -30 24 05.40 V W68
2022-10-21 01:46:14 C 20 51 54.449 -30 24 14.69 V W68
2022-10-22 00:26:28 C 20 52 28.898 -30 36 57.28 V W68
2022-10-22 00:31:39 C 20 52 29.006 -30 36 59.94 V W68
2022-10-22 00:40:18 C 20 52 29.184 -30 37 04.73 V W68
2022-10-22 00:54:31 C 20 52 29.465 -30 37 12.29 V W68
2022-10-23 19:19:10 C 20 53 39.521 -30 59 28.72 V M22
2022-10-23 19:27:31 C 20 53 39.732 -30 59 32.86 V M22
2022-10-23 19:32:08 C 20 53 39.842 -30 59 35.12 V M22
2022-10-23 19:45:57 C 20 53 40.181 -30 59 41.82 V M22
2022-10-23 19:47:14 C 20 53 40.207 -30 59 42.36 V M22
2022-10-23 19:52:38 C 20 53 40.337 -30 59 44.95 V M22
2022-10-23 20:03:50 C 20 53 40.613 -30 59 50.28 V M22
2022-10-23 20:19:49 C 20 53 40.992 -30 59 57.34 V M22
2022-10-25 00:19:58 C 20 54 32.491 -31 13 45.12 V W68
2022-10-25 00:24:39 C 20 54 32.618 -31 13 47.35 V W68
2022-10-25 00:33:21 C 20 54 32.854 -31 13 51.38 V W68
2022-10-25 00:48:40 C 20 54 33.240 -31 13 58.58 V W68
2022-10-26 01:20:39 C 20 55 20.359 -31 25 24.10 V W68
2022-10-26 01:25:23 C 20 55 20.491 -31 25 26.08 V W68
2022-10-26 01:34:02 C 20 55 20.734 -31 25 29.96 V W68
2022-10-26 01:48:37 C 20 55 21.139 -31 25 36.44 V W68
2022-10-26 20:02:39 C 20 55 57.828 -31 33 44.71 V M22
2022-10-26 20:08:36 C 20 55 57.994 -31 33 47.23 V M22
2022-10-26 20:19:13 C 20 55 58.320 -31 33 51.48 V M22
2022-10-26 21:04:59 C 20 55 59.731 -31 34 10.31 V M22
2022-10-27 18:26:32 C 20 56 45.161 -31 43 25.39 V M22
2022-10-27 18:31:08 C 20 56 45.307 -31 43 27.08 V M22
2022-10-27 18:39:08 C 20 56 45.547 -31 43 30.54 V M22
2022-10-27 18:53:35 C 20 56 45.994 -31 43 36.52 V M22
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)