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
2000-08-06 07:04:29 C 00 42 04.10 +34 27 38.4 642
2000-08-06 07:08:57 C 00 42 03.69 +34 27 33.1 642
2000-08-06 07:13:27 C 00 42 03.35 +34 27 29.6 642
2000-08-06 07:21:52 C 00 42 02.62 +34 27 22.4 642
2000-08-06 07:24:49 C 00 42 02.35 +34 27 19.8 642
2000-08-06 10:54:04 C 00 41 43.84 +34 24 32.7 c 670
2000-08-07 06:41:53 C 00 40 03.61 +34 06 30.1 642
2000-08-07 06:49:20 C 00 40 02.99 +34 06 23.1 642
2000-08-07 06:58:30 C 00 40 02.06 +34 06 16.7 642
2000-08-07 07:24:29 C 00 39 59.67 +34 06 09.6 c 720
2000-08-07 07:36:59 C 00 39 58.58 +34 05 59.0 c 720
2000-08-07 07:43:20 C 00 39 58.00 +34 05 52.3 c 720
2000-08-07 07:50:30 C 00 39 57.31 +34 05 46.7 c 720
2000-08-08 04:53:19 C 00 38 04.39 +33 45 32.1 z 762
2000-08-08 05:01:09 C 00 38 03.65 +33 45 24.7 z 762
2000-08-08 05:10:14 C 00 38 02.80 +33 45 16.5 z 762
2000-08-09 08:10:58 C 00 35 29.36 +33 18 02.3 16.0 c 704
2000-08-09 08:33:25 C 00 35 26.97 +33 17 39.3 16.2 c 704
2000-08-09 08:54:31 C 00 35 24.76 +33 17 18.4 16.6 c 704
2000-08-09 09:16:56 C 00 35 22.37 +33 16 55.1 16.1 c 704
2000-08-09 09:38:51 C 00 35 20.00 +33 16 32.5 16.1 c 704
2000-08-09 21:19:40 C 00 34 11.86 +33 03 42.1 z 187
2000-08-09 23:23:54 C 00 33 59.34 +33 01 33.2 z 151
2000-08-09 23:25:35 C 00 33 59.17 +33 01 31.5 z 151
2000-08-09 23:28:00 C 00 33 58.92 +33 01 28.9 z 151
2000-08-09 23:30:14 C 00 33 58.69 +33 01 26.4 z 151
2000-08-10 16:47:52 C 00 32 12.15 +32 42 12.3 300
2000-08-10 16:53:42 C 00 32 11.49 +32 42 05.7 300
2000-08-10 16:59:46 C 00 32 10.81 +32 41 58.8 300
2000-08-11 01:04:03 C 00 31 20.57 +32 32 33.0 z 952
2000-08-11 01:11:33 C 00 31 19.72 +32 32 24.3 z 952
2000-08-11 01:15:25 C 00 31 19.32 +32 32 19.8 z 952
2000-08-11 01:42:06 C 00 31 16.24 +32 31 49.4 z 952
2000-08-12 07:09:36 C 00 28 04.05 +31 55 35.3 642
2000-08-12 07:14:57 C 00 28 03.34 +31 55 28.1 642
2000-08-12 07:23:01 C 00 28 02.41 +31 55 18.9 642
2000-08-12 21:38:55 C 00 26 25.18 +31 36 45.7 z 151
2000-08-12 21:40:19 C 00 26 25.01 +31 36 44.2 z 151
2000-08-12 21:43:42 C 00 26 24.61 +31 36 39.8 z 151
2000-08-12 21:52:31 C 00 26 23.56 +31 36 28.5 z 151
2000-08-13 09:35:07 C 00 25 00.48 +31 20 58.5 c 670
2000-08-13 11:13:24 C 00 24 47.90 +31 18 44.8 c 670
2000-08-13 16:48:31 C 00 24 08.84 +31 11 00.6 300
2000-08-13 16:56:32 C 00 24 07.83 +31 10 49.9 300
2000-08-13 17:10:29 C 00 24 06.02 +31 10 30.3 300
2000-08-13 17:12:34 C 00 24 05.74 +31 10 27.3 300
2000-08-13 17:14:30 C 00 24 05.48 +31 10 24.7 300
2000-08-13 17:16:30 C 00 24 05.25 +31 10 22.0 300
2000-08-13 17:18:29 C 00 24 04.97 +31 10 19.3 300
2000-08-13 17:30:29 C 00 24 03.41 +31 10 02.5 300
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)