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
2022-07-02 03:31:12 C 01 28 24.586 +46 12 11.65 X Z19
2022-07-02 03:32:06 C 01 28 24.518 +46 12 11.47 X Z19
2022-07-02 03:33:01 C 01 28 24.443 +46 12 11.28 X Z19
2022-07-02 03:33:55 C 01 28 24.372 +46 12 11.08 X Z19
2022-07-02 03:34:48 C 01 28 24.297 +46 12 10.87 X Z19
2022-07-02 04:25:19 C 01 28 20.189 +46 11 59.74 X Z19
2022-07-02 04:26:13 C 01 28 20.116 +46 11 59.53 X Z19
2022-07-02 04:27:07 C 01 28 20.036 +46 11 59.32 X Z19
2022-07-02 04:28:01 C 01 28 19.969 +46 11 59.14 X Z19
2022-07-02 04:29:49 C 01 28 19.820 +46 11 58.72 X Z19
2022-07-02 04:30:43 C 01 28 19.748 +46 11 58.52 X Z19
2022-07-02 04:31:37 C 01 28 19.666 +46 11 58.30 X Z19
2022-07-02 04:32:31 C 01 28 19.597 +46 11 58.11 X Z19
2022-07-02 04:33:25 C 01 28 19.516 +46 11 57.90 X Z19
2022-07-02 04:36:09 C 01 28 19.301 +46 11 57.30 X Z19
2022-07-02 04:37:03 C 01 28 19.222 +46 11 57.08 X Z19
2022-07-02 04:37:57 C 01 28 19.150 +46 11 56.88 X Z19
2022-07-02 04:39:45 C 01 28 19.004 +46 11 56.50 X Z19
2022-07-02 04:40:39 C 01 28 18.926 +46 11 56.26 X Z19
2022-07-02 04:41:33 C 01 28 18.851 +46 11 56.07 X Z19
2022-07-02 04:42:27 C 01 28 18.775 +46 11 55.86 X Z19
2022-07-02 04:43:21 C 01 28 18.703 +46 11 55.66 X Z19
2022-07-02 04:44:15 C 01 28 18.629 +46 11 55.46 X Z19
2022-07-02 04:45:10 C 01 28 18.551 +46 11 55.24 X Z19
2022-07-02 04:46:04 C 01 28 18.478 +46 11 55.04 X Z19
2022-07-02 04:46:59 C 01 28 18.399 +46 11 54.81 X Z19
2022-07-02 04:47:53 C 01 28 18.330 +46 11 54.63 X Z19
2022-07-02 04:48:48 C 01 28 18.250 +46 11 54.41 X Z19
2022-07-02 04:49:42 C 01 28 18.176 +46 11 54.21 X Z19
2022-07-02 04:50:36 C 01 28 18.102 +46 11 54.00 X Z19
2022-07-02 04:51:30 C 01 28 18.029 +46 11 53.80 X Z19
2022-07-02 04:52:24 C 01 28 17.952 +46 11 53.59 X Z19
2022-07-02 04:53:18 C 01 28 17.879 +46 11 53.37 X Z19
2022-07-02 04:54:13 C 01 28 17.803 +46 11 53.17 X Z19
2022-07-02 04:55:07 C 01 28 17.728 +46 11 52.97 X Z19
2022-07-02 04:56:01 C 01 28 17.652 +46 11 52.75 X Z19
2022-07-02 04:56:55 C 01 28 17.576 +46 11 52.53 X Z19
2022-07-02 04:57:49 C 01 28 17.502 +46 11 52.34 X Z19
2022-07-02 04:58:43 C 01 28 17.427 +46 11 52.12 X Z19
2022-07-02 04:59:37 C 01 28 17.351 +46 11 51.92 X Z19
2022-07-02 05:01:26 C 01 28 17.202 +46 11 51.50 X Z19
2022-07-05 10:51:53 C 01 22 34.352 +45 49 50.02 V 703
2022-07-05 10:58:13 C 01 22 33.866 +45 49 48.40 V 703
2022-07-05 11:04:31 C 01 22 33.377 +45 49 46.70 V 703
2022-07-05 11:10:50 C 01 22 32.898 +45 49 45.34 V 703
2022-07-06 04:04:58 C 01 21 22.464 +45 44 53.23 V G40
2022-07-06 04:20:09 C 01 21 21.288 +45 44 48.16 V G40
2022-07-06 04:35:10 C 01 21 20.150 +45 44 44.34 V G40
2022-07-06 04:50:07 C 01 21 18.982 +45 44 41.17 V G40
2022-07-07 14:08:10 C 01 19 02.340 +45 35 01.25 V T05
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)