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
2022-09-12 13:33:24 C 21 31 10.12 -05 02 12.6 V D29
2022-09-12 13:45:45 C 21 31 08.24 -05 02 55.4 V D29
2022-09-12 13:58:07 C 21 31 06.35 -05 03 38.0 V D29
2022-09-12 19:31:55 C 21 30 19.73 -05 22 54.4 X G02
2022-09-12 19:36:14 V 21 30 19.52 -05 23 07.4 V 270
2022-09-12 19:36:14 v 1 004.83098 +47.04034 270
2022-09-12 19:40:18 C 21 30 18.49 -05 23 22.9 X G02
2022-09-12 19:43:43 C 21 30 17.98 -05 23 34.0 X G02
2022-09-12 19:50:32 C 21 30 16.98 -05 23 57.8 X G02
2022-09-12 20:00:25 C 21 30 15.83 -05 24 30.2 V 130
2022-09-12 20:01:30 C 21 30 15.67 -05 24 33.9 V 130
2022-09-12 20:02:35 C 21 30 15.51 -05 24 37.7 V 130
2022-09-12 20:13:22 V 21 30 14.03 -05 25 14.7 V 270
2022-09-12 20:13:22 v 1 004.83098 +47.04034 270
2022-09-12 20:23:05 C 21 30 12.58 -05 25 50.1 V C23
2022-09-12 20:27:36 C 21 30 11.92 -05 26 05.8 V C23
2022-09-12 20:31:43 C 21 30 11.31 -05 26 19.8 V C23
2022-09-12 21:02:59 V 21 30 06.69 -05 28 04.7 V 270
2022-09-12 21:02:59 v 1 004.83098 +47.04034 270
2022-09-12 21:49:20 V 21 29 59.83 -05 30 42.8 V 270
2022-09-12 21:49:20 v 1 004.83098 +47.04034 270
2022-09-13 18:36:08 C 21 27 10.291 -06 40 34.64 V K73
2022-09-13 18:38:42 C 21 27 09.931 -06 40 43.07 V K73
2022-09-13 18:41:28 C 21 27 09.547 -06 40 52.39 V K73
2022-09-14 09:34:46 V 21 25 10.68 -07 28 47.3 V 270
2022-09-14 09:34:46 v 1 175.46575 -37.91873 270
2022-09-14 10:42:58 V 21 25 01.18 -07 32 28.5 V 270
2022-09-14 10:42:58 v 1 175.46575 -37.91873 270
2022-09-14 11:16:56 V 21 24 56.45 -07 34 18.2 V 270
2022-09-14 11:16:56 v 1 175.46575 -37.91873 270
2022-09-14 11:46:55 V 21 24 52.30 -07 35 54.6 V 270
2022-09-14 11:46:55 v 1 175.46575 -37.91873 270
2022-09-14 12:12:59 C 21 24 51.108 -07 37 29.57 V P07
2022-09-14 14:39:34 C 21 24 30.607 -07 45 22.03 V P07
2022-09-14 15:41:48 C 21 24 21.917 -07 48 41.54 V P07
2022-09-14 15:45:13 C 21 24 21.442 -07 48 52.52 V P07
2022-09-14 19:42:36 C 21 23 51.79 -08 02 14.2 V C40
2022-09-14 19:53:32 C 21 23 50.30 -08 02 48.9 V C40
2022-09-14 20:04:11 C 21 23 48.85 -08 03 22.9 V C40
2022-09-14 21:48:02 C 21 23 35.275 -08 08 04.13 V M22
2022-09-14 21:52:37 C 21 23 34.644 -08 08 18.67 V M22
2022-09-14 22:00:25 C 21 23 33.583 -08 08 43.48 V M22
2022-09-14 22:29:13 C 21 23 29.674 -08 10 14.56 V M22
2022-09-15 04:22:54 C 21 22 45.16 -08 29 18.2 V W60
2022-09-15 04:52:25 C 21 22 41.15 -08 30 50.7 V W60
2022-09-15 05:22:56 C 21 22 37.04 -08 32 26.0 V W60
2022-09-15 07:34:10 V 21 22 23.81 -08 38 48.7 V 270
2022-09-15 07:34:10 v 1 174.65781 -36.83545 270
2022-09-15 08:09:30 V 21 22 19.14 -08 40 39.9 V 270
2022-09-15 08:09:30 v 1 174.65781 -36.83545 270
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)