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
2021-12-02 02:00:10 C 20 10 40.67 -17 53 35.0 U I41
2021-12-02 02:06:33 C 20 10 41.52 -17 53 34.6 U I41
2021-12-02 02:12:57 C 20 10 42.39 -17 53 34.1 U I41
2021-12-02 02:19:20 C 20 10 43.25 -17 53 33.2 U I41
2021-12-02 02:25:42 C 20 10 44.10 -17 53 32.8 U I41
2022-06-11 11:17:57 C 02 29 45.041 +47 30 32.90 U I41
2022-06-11 11:21:26 C 02 29 44.371 +47 30 33.70 U I41
2022-06-11 11:24:56 C 02 29 43.709 +47 30 34.60 U I41
2022-06-11 11:28:26 C 02 29 43.030 +47 30 35.21 U I41
2022-06-11 11:31:55 C 02 29 42.410 +47 30 36.00 U I41
2022-06-17 11:06:17 C 02 05 46.390 +47 31 33.71 U I41
2022-06-17 11:09:05 C 02 05 45.989 +47 31 33.71 U I41
2022-06-17 11:11:55 C 02 05 45.559 +47 31 33.38 U I41
2022-06-17 11:14:46 C 02 05 45.139 +47 31 33.31 U I41
2022-07-02 02:57:17 C 01 28 27.296 +46 12 18.95 X Z19
2022-07-02 02:59:11 C 01 28 27.146 +46 12 18.56 X Z19
2022-07-02 03:00:05 C 01 28 27.075 +46 12 18.36 X Z19
2022-07-02 03:01:00 C 01 28 26.999 +46 12 18.16 X Z19
2022-07-02 03:01:54 C 01 28 26.929 +46 12 17.97 X Z19
2022-07-02 03:02:48 C 01 28 26.860 +46 12 17.75 X Z19
2022-07-02 03:03:42 C 01 28 26.786 +46 12 17.58 X Z19
2022-07-02 03:04:36 C 01 28 26.718 +46 12 17.40 X Z19
2022-07-02 03:05:30 C 01 28 26.644 +46 12 17.19 X Z19
2022-07-02 03:06:25 C 01 28 26.574 +46 12 17.00 X Z19
2022-07-02 03:07:19 C 01 28 26.502 +46 12 16.81 X Z19
2022-07-02 03:08:13 C 01 28 26.430 +46 12 16.61 X Z19
2022-07-02 03:09:07 C 01 28 26.359 +46 12 16.42 X Z19
2022-07-02 03:10:01 C 01 28 26.282 +46 12 16.22 X Z19
2022-07-02 03:10:55 C 01 28 26.213 +46 12 16.02 X Z19
2022-07-02 03:11:50 C 01 28 26.138 +46 12 15.82 X Z19
2022-07-02 03:12:44 C 01 28 26.070 +46 12 15.64 X Z19
2022-07-02 03:13:39 C 01 28 25.992 +46 12 15.44 X Z19
2022-07-02 03:14:34 C 01 28 25.922 +46 12 15.24 X Z19
2022-07-02 03:15:28 C 01 28 25.846 +46 12 15.06 X Z19
2022-07-02 03:16:22 C 01 28 25.778 +46 12 14.86 X Z19
2022-07-02 03:17:16 C 01 28 25.704 +46 12 14.66 X Z19
2022-07-02 03:18:10 C 01 28 25.633 +46 12 14.47 X Z19
2022-07-02 03:19:04 C 01 28 25.561 +46 12 14.28 X Z19
2022-07-02 03:19:59 C 01 28 25.492 +46 12 14.10 X Z19
2022-07-02 03:20:53 C 01 28 25.420 +46 12 13.89 X Z19
2022-07-02 03:21:47 C 01 28 25.345 +46 12 13.70 X Z19
2022-07-02 03:22:41 C 01 28 25.272 +46 12 13.51 X Z19
2022-07-02 03:23:35 C 01 28 25.203 +46 12 13.30 X Z19
2022-07-02 03:24:29 C 01 28 25.120 +46 12 13.10 X Z19
2022-07-02 03:25:24 C 01 28 25.058 +46 12 12.91 X Z19
2022-07-02 03:26:19 C 01 28 24.988 +46 12 12.73 X Z19
2022-07-02 03:27:13 C 01 28 24.909 +46 12 12.52 X Z19
2022-07-02 03:28:07 C 01 28 24.834 +46 12 12.33 X Z19
2022-07-02 03:29:02 C 01 28 24.765 +46 12 12.13 X Z19
2022-07-02 03:29:56 C 01 28 24.691 +46 12 11.94 X Z19
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)