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
2022-08-13 21:24:58 V 23 48 38.56 +34 59 18.0 V 270
2022-08-13 21:24:58 v 1 025.76486 +62.27741 270
2022-08-13 22:06:11 V 23 48 30.64 +34 58 00.2 V 270
2022-08-13 22:06:11 v 1 025.76486 +62.27741 270
2022-08-13 22:11:26 C 23 48 31.02 +34 58 02.5 V M26
2022-08-13 22:13:29 C 23 48 30.65 +34 57 58.9 V M26
2022-08-13 22:15:17 C 23 48 30.33 +34 57 55.6 V M26
2022-08-13 22:49:23 V 23 48 22.92 +34 56 43.0 V 270
2022-08-13 22:49:23 v 1 025.76486 +62.27741 270
2022-08-13 23:28:52 V 23 48 15.96 +34 55 33.7 V 270
2022-08-13 23:28:52 v 1 025.76486 +62.27741 270
2022-08-14 13:18:29 C 23 45 46.714 +34 30 04.57 V T05
2022-08-14 13:23:37 C 23 45 45.710 +34 29 54.67 V T05
2022-08-14 14:54:30 C 23 45 28.234 +34 26 57.34 V T05
2022-08-14 15:04:03 V 23 45 30.54 +34 26 33.0 V 270
2022-08-14 15:04:03 v 1 114.16842 +22.37460 270
2022-08-14 15:24:06 V 23 45 26.77 +34 25 56.6 V 270
2022-08-14 15:24:06 v 1 114.16842 +22.37460 270
2022-08-14 15:51:19 V 23 45 21.50 +34 25 05.5 V 270
2022-08-14 15:51:19 v 1 114.16842 +22.37460 270
2022-08-14 17:06:41 V 23 45 07.07 +34 22 43.3 V 270
2022-08-14 17:06:41 v 1 114.16842 +22.37460 270
2022-08-14 20:07:40 C 23 44 35.17 +34 16 24.0 V G34
2022-08-14 20:09:46 C 23 44 34.79 +34 16 19.7 V G34
2022-08-14 20:12:17 C 23 44 34.30 +34 16 15.1 V G34
2022-08-14 20:14:32 C 23 44 33.90 +34 16 11.0 V G34
2022-08-14 20:16:22 C 23 44 33.59 +34 16 07.4 V G34
2022-08-14 20:18:37 C 23 44 33.15 +34 16 03.4 V G34
2022-08-14 20:21:25 C 23 44 32.63 +34 15 58.0 V G34
2022-08-14 22:40:32 V 23 44 06.63 +34 11 35.4 V 270
2022-08-14 22:40:32 v 1 016.33597 +48.20424 270
2022-08-14 23:18:04 V 23 43 59.52 +34 10 22.9 V 270
2022-08-14 23:18:04 v 1 016.33597 +48.20424 270
2022-08-15 00:27:02 V 23 43 46.31 +34 08 08.2 V 270
2022-08-15 00:27:02 v 1 016.33597 +48.20424 270
2022-08-15 01:22:37 V 23 43 35.71 +34 06 20.0 V 270
2022-08-15 01:22:37 v 1 016.33597 +48.20424 270
2022-08-15 11:02:41 C 23 41 50.472 +33 47 16.69 V T05
2022-08-15 11:37:55 C 23 41 43.524 +33 46 06.31 V T05
2022-08-15 11:42:12 C 23 41 42.677 +33 45 57.82 V T05
2022-08-15 11:46:09 C 23 41 41.894 +33 45 49.79 V T05
2022-08-16 00:13:45 C 23 39 22.74 +33 19 47.7 Y 557
2022-08-16 01:01:45 C 23 39 13.33 +33 18 07.4 Y 557
2022-08-16 01:46:39 C 23 39 04.51 +33 16 32.6 Y 557
2022-08-16 02:31:35 C 23 38 55.70 +33 14 57.3 Y 557
2022-08-16 11:37:53 C 23 37 14.076 +32 55 53.33 V T08
2022-08-16 11:41:12 C 23 37 13.409 +32 55 46.20 V T08
2022-08-16 11:45:12 C 23 37 12.598 +32 55 37.60 V T08
2022-08-16 12:07:39 C 23 37 08.045 +32 54 49.28 V T08
2022-08-16 19:30:31 C 23 35 45.79 +32 38 10.7 V M34
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)