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
2022-08-16 19:55:30 C 23 35 40.91 +32 37 15.7 Y 557
2022-08-16 20:10:58 C 23 35 37.96 +32 36 43.9 V M34
2022-08-16 20:51:58 C 23 35 29.96 +32 35 15.7 V M34
2022-08-16 21:19:05 C 23 35 24.63 +32 34 15.7 Y 557
2022-08-16 21:56:15 C 23 35 17.31 +32 32 55.2 Y 557
2022-08-16 22:56:39 C 23 35 05.32 +32 30 43.6 Y 557
2022-08-16 23:55:28 C 23 34 53.57 +32 28 34.1 Y 557
2022-08-17 00:14:04 C 23 34 49.84 +32 27 53.0 Y 557
2022-08-17 00:49:40 C 23 34 42.70 +32 26 33.7 Y 557
2022-08-17 01:40:47 C 23 34 32.43 +32 24 39.2 Y 557
2022-08-17 02:28:45 C 23 34 22.79 +32 22 50.7 Y 557
2022-08-17 02:54:23 C 23 34 20.24 +32 22 37.2 X X93
2022-08-17 02:56:36 C 23 34 19.84 +32 22 32.8 X X93
2022-08-17 02:58:21 C 23 34 19.38 +32 22 28.6 X X93
2022-08-17 12:54:10 C 23 32 22.346 +31 59 31.99 V T08
2022-08-17 13:03:11 C 23 32 20.474 +31 59 11.08 V T08
2022-08-17 13:07:47 C 23 32 19.526 +31 59 00.38 V T08
2022-08-17 13:22:29 C 23 32 16.486 +31 58 26.18 V T08
2022-08-17 14:31:50 C 23 32 02.235 +31 55 42.64 U F52
2022-08-17 14:42:00 C 23 32 00.150 +31 55 18.63 U F52
2022-08-17 14:52:07 C 23 31 58.077 +31 54 54.65 U F52
2022-08-17 19:30:30 C 23 31 07.91 +31 43 40.6 V M34
2022-08-17 20:01:28 C 23 31 01.76 +31 42 28.6 Y 557
2022-08-17 20:11:19 C 23 30 59.83 +31 42 07.5 V M34
2022-08-17 20:53:12 C 23 30 51.49 +31 40 31.7 V M34
2022-08-17 21:00:19 C 23 30 50.04 +31 40 13.9 Y 557
2022-08-17 22:00:41 C 23 30 37.88 +31 37 54.7 Y 557
2022-08-18 00:00:11 C 23 30 13.53 +31 33 15.9 Y 557
2022-08-18 01:00:34 C 23 30 01.14 +31 30 53.0 Y 557
2022-08-18 01:59:25 C 23 29 49.08 +31 28 32.6 Y 557
2022-08-18 04:24:28 V 23 29 23.56 +31 22 54.3 V 270
2022-08-18 04:24:28 v 1 261.34425 +29.49924 270
2022-08-18 04:34:24 V 23 29 21.45 +31 22 30.7 V 270
2022-08-18 04:34:24 v 1 261.34425 +29.49924 270
2022-08-18 04:43:08 V 23 29 19.76 +31 22 10.3 V 270
2022-08-18 04:43:08 v 1 261.34425 +29.49924 270
2022-08-18 04:51:44 V 23 29 18.01 +31 21 50.4 V 270
2022-08-18 04:51:44 v 1 261.34425 +29.49924 270
2022-08-18 10:10:36 C 23 28 14.506 +31 09 11.81 V T05
2022-08-18 10:14:31 C 23 28 13.690 +31 09 02.52 V T05
2022-08-18 10:19:04 C 23 28 12.737 +31 08 51.68 V T05
2022-08-18 10:35:44 C 23 28 09.240 +31 08 11.80 V T05
2022-08-18 15:25:52 V 23 27 11.26 +30 56 14.4 V 270
2022-08-18 15:25:52 v 1 140.17000 +36.06000 270
2022-08-18 16:20:19 V 23 26 59.71 +30 54 01.5 V 270
2022-08-18 16:20:19 v 1 140.17000 +36.06000 270
2022-08-18 17:18:34 V 23 26 47.57 +30 51 36.0 V 270
2022-08-18 17:18:34 v 1 140.17000 +36.06000 270
2022-08-18 18:11:17 V 23 26 36.33 +30 49 24.7 V 270
2022-08-18 18:11:17 v 1 140.17000 +36.06000 270
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)