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
2025-10-09 07:09:51 C 19 59 03.590 -22 02 16.91 V T05
2025-10-09 07:22:39 C 19 59 04.378 -22 02 26.30 V T05
2025-10-09 07:27:19 C 19 59 04.661 -22 02 29.98 V T05
2025-10-09 07:49:21 C 19 59 06.031 -22 02 45.67 V T05
2025-10-10 01:04:37 B 20 00 15.365 -22 15 09.50 X X24
2025-10-10 01:18:51 B 20 00 16.236 -22 15 19.87 X X24
2025-10-10 01:32:01 B 20 00 17.081 -22 15 29.09 X X24
2025-10-10 18:51:36 C 20 01 27.175 -22 27 44.96 V M22
2025-10-10 19:14:55 C 20 01 28.646 -22 28 00.80 V M22
2025-10-10 19:19:17 C 20 01 28.930 -22 28 03.76 V M22
2025-10-10 19:27:18 C 20 01 29.431 -22 28 09.44 V M22
2025-10-12 01:28:40 C 20 03 31.994 -22 48 33.23 V W68
2025-10-12 01:32:41 C 20 03 32.268 -22 48 35.93 V W68
2025-10-12 01:39:59 C 20 03 32.741 -22 48 40.54 V W68
2025-10-12 01:55:29 C 20 03 33.756 -22 48 50.40 V W68
2025-10-13 06:23:03 C 20 05 31.730 -23 07 25.00 V T08
2025-10-13 06:27:00 C 20 05 31.987 -23 07 27.16 V T08
2025-10-13 06:34:15 C 20 05 32.462 -23 07 31.62 V T08
2025-10-13 06:48:07 C 20 05 33.338 -23 07 40.55 V T08
2025-10-14 02:56:28 B 20 06 57.238 -23 19 49.80 X X24
2025-10-14 03:19:24 B 20 06 58.778 -23 20 03.59 X X24
2025-10-14 03:41:22 B 20 07 00.266 -23 20 15.36 X X24
2025-10-16 18:43:10 C 20 11 29.251 -23 56 15.50 V M22
2025-10-16 18:48:06 C 20 11 29.582 -23 56 18.06 V M22
2025-10-16 19:24:15 C 20 11 32.038 -23 56 37.00 V M22
2025-10-16 19:32:07 C 20 11 32.566 -23 56 41.28 V M22
2025-10-18 00:53:26 C 20 13 40.092 -24 12 03.02 V W68
2025-10-18 00:57:26 C 20 13 40.358 -24 12 05.00 V W68
2025-10-18 01:05:03 C 20 13 40.884 -24 12 08.82 V W68
2025-10-18 01:25:29 C 20 13 42.293 -24 12 19.04 V W68
2025-10-19 18:39:39 C 20 16 43.800 -24 32 27.92 V M22
2025-10-19 19:09:31 C 20 16 45.888 -24 32 41.93 V M22
2025-10-19 19:16:49 C 20 16 46.399 -24 32 45.17 V M22
2025-10-24 00:16:31 C 20 24 21.941 -25 15 46.58 V W68
2025-10-24 00:21:06 C 20 24 22.265 -25 15 48.38 V W68
2025-10-24 00:30:02 C 20 24 22.922 -25 15 51.77 V W68
2025-10-24 00:44:55 C 20 24 24.005 -25 15 56.99 V W68
2025-10-28 18:02:13 C 20 33 11.582 -25 54 40.32 V M22
2025-10-28 18:10:23 C 20 33 12.175 -25 54 43.16 V M22
2025-10-28 18:24:33 C 20 33 13.296 -25 54 46.98 V M22
2025-11-03 07:07:30 C 20 43 49.349 -26 29 24.22 V T05
2025-11-03 07:12:52 C 20 43 49.826 -26 29 26.23 V T05
2025-11-03 07:21:26 C 20 43 50.489 -26 29 27.74 V T05
2025-11-03 07:37:51 C 20 43 51.770 -26 29 30.95 V T05
2025-11-05 00:59:21 C 20 47 13.682 -26 37 58.30 V W68
2025-11-05 01:03:22 C 20 47 14.002 -26 37 58.19 V W68
2025-11-05 01:25:18 C 20 47 15.698 -26 38 02.94 V W68
2025-11-05 01:34:07 C 20 47 16.387 -26 38 04.67 V W68
2025-11-11 01:06:58 C 20 59 06.535 -27 01 08.22 V W68
2025-11-11 01:25:07 C 20 59 07.944 -27 01 09.41 V W68
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)