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
2022-09-01 22:16:02 v 1 006.13031 +48.70282 270
2022-09-01 22:28:39 C 22 15 25.38 +11 28 35.4 V L65
2022-09-01 22:54:18 V 22 15 19.61 +11 26 48.5 V 270
2022-09-01 22:54:18 v 1 006.90683 +44.69673 270
2022-09-01 23:29:35 C 22 15 12.65 +11 24 27.8 V L65
2022-09-01 23:48:17 V 22 15 08.30 +11 23 09.0 V 270
2022-09-01 23:48:17 v 1 006.90683 +44.69673 270
2022-09-02 00:40:20 V 22 14 57.43 +11 19 36.0 V 270
2022-09-02 00:40:20 v 1 006.90683 +44.69673 270
2022-09-02 01:31:59 V 22 14 49.99 +11 16 13.2 V 270
2022-09-02 01:31:59 v 1 284.88510 +46.38806 270
2022-09-02 01:42:34 V 22 14 47.75 +11 15 29.6 V 270
2022-09-02 01:42:34 v 1 284.88510 +46.38806 270
2022-09-02 01:56:24 V 22 14 44.88 +11 14 33.4 V 270
2022-09-02 01:56:24 v 1 284.88510 +46.38806 270
2022-09-02 02:06:03 V 22 14 42.90 +11 13 54.6 V 270
2022-09-02 02:06:03 v 1 284.88510 +46.38806 270
2022-09-02 08:16:26 C 22 13 28.848 +10 49 07.28 V T08
2022-09-02 08:19:18 C 22 13 28.243 +10 48 55.58 V T08
2022-09-02 08:32:00 C 22 13 25.558 +10 48 04.07 V T08
2022-09-02 08:39:18 C 22 13 24.014 +10 47 34.40 V T08
2022-09-02 10:23:19 C 22 13 02.014 +10 40 30.00 V T05
2022-09-02 10:29:10 C 22 13 00.773 +10 40 06.10 V T05
2022-09-02 11:19:58 C 22 12 50.045 +10 36 38.66 V T05
2022-09-02 15:06:07 C 22 12 06.61 +10 21 07.6 V D29
2022-09-02 15:46:51 C 22 11 58.08 +10 18 21.6 V D29
2022-09-02 19:31:13 C 22 11 15.56 +10 02 51.6 V C23
2022-09-02 19:36:09 C 22 11 14.55 +10 02 31.7 V C23
2022-09-02 19:37:52 C 22 11 13.30 +10 02 30.5 V C40
2022-09-02 19:38:14 C 22 11 13.23 +10 02 29.0 V C40
2022-09-02 19:41:02 C 22 11 12.65 +10 02 17.5 V C40
2022-09-02 19:41:21 V 22 11 12.66 +10 02 06.9 V 270
2022-09-02 19:41:21 v 1 026.21283 +60.73340 270
2022-09-02 19:41:24 C 22 11 12.58 +10 02 16.1 V C40
2022-09-02 19:41:30 C 22 11 13.48 +10 02 10.0 V C23
2022-09-02 19:42:05 C 22 11 12.43 +10 02 13.2 V C40
2022-09-02 19:42:27 C 22 11 12.36 +10 02 11.8 V C40
2022-09-02 19:43:29 C 22 11 12.14 +10 02 07.5 V C40
2022-09-02 19:43:51 C 22 11 12.07 +10 02 06.1 V C40
2022-09-02 19:44:11 C 22 11 12.00 +10 02 04.7 V C40
2022-09-02 19:45:36 C 22 11 11.71 +10 01 59.0 V C40
2022-09-02 19:45:58 C 22 11 11.64 +10 01 57.5 V C40
2022-09-02 19:46:18 C 22 11 11.56 +10 01 56.1 V C40
2022-09-02 19:46:39 C 22 11 11.49 +10 01 54.7 V C40
2022-09-02 19:47:22 C 22 11 11.35 +10 01 51.7 V C40
2022-09-02 19:47:43 C 22 11 11.27 +10 01 50.3 V C40
2022-09-02 19:48:25 C 22 11 11.13 +10 01 47.4 V C40
2022-09-02 19:48:46 C 22 11 11.06 +10 01 46.0 V C40
2022-09-02 19:50:53 C 22 11 10.62 +10 01 37.4 V C40
2022-09-02 19:52:18 C 22 11 10.33 +10 01 31.7 V C40
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)