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
2022-07-24 17:36:08 S 00 50 04.318 +43 05 41.53 L C51
2022-07-24 19:10:01 S 00 49 56.38 +43 04 54.9 L C51
2022-07-24 20:44:06 S 00 49 48.38 +43 04 08.5 L C51
2022-07-24 22:17:58 S 00 49 40.39 +43 03 21.8 L C51
2022-07-25 01:25:45 S 00 49 24.36 +43 01 47.5 L C51
2022-07-26 22:20:07 C 00 45 28.81 +42 37 58.6 Y 557
2022-07-26 23:18:03 C 00 45 23.37 +42 37 29.4 Y 557
2022-07-27 00:22:02 C 00 45 17.18 +42 36 56.5 Y 557
2022-07-27 20:53:11 C 00 43 22.45 +42 24 57.5 Y 557
2022-07-27 21:52:35 C 00 43 16.82 +42 24 25.7 Y 557
2022-07-27 22:54:52 C 00 43 10.77 +42 23 52.3 Y 557
2022-07-27 23:51:42 C 00 43 05.13 +42 23 21.3 Y 557
2022-07-28 01:11:22 C 00 42 57.07 +42 22 37.0 Y 557
2022-07-28 01:48:51 C 00 42 53.23 +42 22 15.7 Y 557
2022-07-28 21:04:47 C 00 41 02.078 +42 10 17.83 V K73
2022-07-28 21:08:24 C 00 41 01.651 +42 10 16.82 V K73
2022-07-28 21:12:03 C 00 41 01.289 +42 10 14.02 V K73
2022-07-31 01:09:03 C 00 35 38.39 +41 35 28.7 t B66
2022-07-31 01:32:43 C 00 35 35.66 +41 35 12.5 t B66
2022-08-02 20:12:32 C 00 28 00.36 +40 42 10.7 Y 557
2022-08-02 21:13:31 C 00 27 53.04 +40 41 21.7 Y 557
2022-08-02 22:11:26 C 00 27 45.93 +40 40 34.6 Y 557
2022-08-02 23:09:33 C 00 27 38.67 +40 39 47.0 Y 557
2022-08-03 00:11:44 C 00 27 30.80 +40 38 55.2 Y 557
2022-08-03 01:16:45 C 00 27 22.46 +40 38 00.0 Y 557
2022-08-03 02:14:40 C 00 27 14.96 +40 37 09.9 Y 557
2022-08-03 22:29:28 C 00 24 46.14 +40 18 40.0 Y 557
2022-08-03 23:29:42 C 00 24 38.29 +40 17 46.7 Y 557
2022-08-04 00:30:29 C 00 24 30.25 +40 16 52.0 Y 557
2022-08-04 01:04:15 C 00 24 25.85 +40 16 19.0 V L65
2022-08-04 01:32:55 C 00 24 22.03 +40 15 52.8 V L65
2022-08-04 01:37:32 C 00 24 21.28 +40 15 50.5 Y 557
2022-08-04 01:59:25 C 00 24 18.49 +40 15 28.2 V L65
2022-08-04 20:22:29 C 00 21 58.42 +39 57 28.0 Y 557
2022-08-04 21:24:15 C 00 21 50.32 +39 56 30.3 Y 557
2022-08-04 22:19:19 C 00 21 42.97 +39 55 38.5 Y 557
2022-08-05 00:38:55 C 00 21 23.88 +39 53 24.6 Y 557
2022-08-05 01:22:35 C 00 21 17.82 +39 52 41.7 Y 557
2022-08-05 02:05:16 C 00 21 11.88 +39 51 59.1 Y 557
2022-08-05 20:59:57 C 00 18 42.21 +39 32 06.7 V C23
2022-08-05 21:02:56 C 00 18 41.80 +39 32 03.8 V C23
2022-08-06 02:03:56 C 00 17 59.35 +39 26 52.8 V L65
2022-08-06 02:15:32 C 00 17 57.66 +39 26 40.3 V L65
2022-08-06 02:30:51 C 00 17 55.45 +39 26 23.8 V L65
2022-08-06 12:51:11 C 00 16 30.583 +39 15 21.35 V T08
2022-08-06 12:57:11 C 00 16 29.669 +39 15 14.87 V T08
2022-08-06 13:31:11 C 00 16 24.528 +39 14 37.21 V T08
2022-08-06 20:27:01 C 00 15 28.20 +39 06 13.8 V C23
2022-08-06 20:31:38 C 00 15 27.61 +39 06 08.2 V C23
2022-08-06 20:36:50 C 00 15 26.91 +39 06 02.7 V C23
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)