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
2000-08-13 21:58:53 C 00 23 32.32 +31 03 31.2 c 113
2000-08-13 22:10:06 C 00 23 30.91 +31 03 15.8 c 113
2000-08-13 22:14:37 C 00 23 30.35 +31 03 09.7 c 113
2000-08-14 10:19:24 C 00 22 00.44 +30 46 03.8 c 670
2000-08-15 11:50:22 C 00 18 45.54 +30 07 32.7 c 670
2000-08-16 06:27:06 C 00 16 20.76 +29 37 31.9 642
2000-08-16 06:30:41 C 00 16 20.31 +29 37 26.5 642
2000-08-16 06:36:05 C 00 16 19.53 +29 37 17.2 642
2000-08-16 20:11:55 C 00 14 29.17 +29 14 32.3 z 151
2000-08-16 20:14:40 C 00 14 28.80 +29 14 27.7 z 151
2000-08-16 20:17:50 C 00 14 28.37 +29 14 22.5 z 151
2000-08-16 20:21:40 C 00 14 27.86 +29 14 16.3 z 151
2000-08-17 09:14:15 C 00 12 39.56 +28 52 20.3 c 670
2000-08-17 12:30:10 C 00 12 10.10 +28 46 33.3 c 670
2000-08-22 03:57:04 C 23 55 01.56 +24 58 46.1 635
2000-08-22 04:03:35 C 23 55 00.44 +24 58 30.5 635
2000-08-22 04:09:09 C 23 54 59.44 +24 58 17.2 635
2000-08-22 05:01:08 C 23 54 53.92 +24 56 18.1 i 739
2000-08-22 05:03:21 C 23 54 53.54 +24 56 13.0 i 739
2000-08-22 05:06:38 C 23 54 52.97 +24 56 05.5 i 739
2000-08-22 05:07:50 C 23 54 52.99 +24 55 51.6 642
2000-08-22 05:09:37 C 23 54 52.66 +24 55 48.1 642
2000-08-22 05:11:24 C 23 54 52.35 +24 55 44.0 642
2000-08-22 05:13:12 C 23 54 52.07 +24 55 40.4 642
2000-08-22 05:15:00 C 23 54 51.77 +24 55 35.9 642
2000-08-22 05:26:59 C 23 54 48.68 +24 55 19.7 z 294
2000-08-22 05:33:50 C 23 54 47.42 +24 55 04.1 z 294
2000-08-22 05:48:34 C 23 54 44.92 +24 54 29.7 z 294
2000-08-22 05:54:36 C 23 54 43.83 +24 54 15.6 z 294
2000-08-22 06:11:08 C 23 54 40.91 +24 53 37.2 z 294
2000-08-22 22:30:56 C 23 51 56.47 +24 14 27.5 c 127
2000-08-22 22:38:06 C 23 51 55.20 +24 14 10.2 c 127
2000-08-22 22:45:32 C 23 51 53.88 +24 13 52.2 c 127
2000-08-23 05:12:25 C 23 50 48.39 +23 57 59.9 642
2000-08-23 05:15:05 C 23 50 47.99 +23 57 53.8 642
2000-08-23 05:17:44 C 23 50 47.52 +23 57 46.8 642
2000-08-23 19:57:00 C 23 48 14.99 +23 20 56.3 d 557
2000-08-23 20:17:21 C 23 48 11.36 +23 20 05.2 d 557
2000-08-23 20:24:25 C 23 48 10.26 +23 19 47.4 14.5 c 172
2000-08-23 20:28:46 C 23 48 09.51 +23 19 36.9 14.5 c 172
2000-08-23 21:20:38 C 23 47 59.99 +23 17 25.8 d 557
2000-08-23 21:47:53 C 23 47 55.31 +23 16 17.8 14.6 c 172
2000-08-23 21:51:14 C 23 47 54.70 +23 16 09.1 14.6 c 172
2000-08-23 22:32:14 C 23 47 46.98 +23 14 24.3 d 557
2000-08-23 22:41:00 C 23 47 45.53 +23 14 00.5 c 127
2000-08-23 22:46:56 C 23 47 44.47 +23 13 45.4 c 127
2000-08-23 22:51:59 C 23 47 43.66 +23 13 35.4 14.5 c 172
2000-08-23 22:52:33 C 23 47 43.43 +23 13 31.2 c 127
2000-08-23 22:54:46 C 23 47 43.12 +23 13 28.0 14.5 c 172
2000-08-23 23:13:43 C 23 47 39.38 +23 12 38.5 d 557
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)