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
2010-06-17 11:02:12 C 01 05 20.40 +14 51 35.5 r G96
2010-07-15 03:15:53 C 02 14 25.10 +17 07 05.6 r J75
2010-07-15 03:34:26 C 02 14 27.03 +17 07 07.0 r J75
2010-07-15 03:53:01 C 02 14 29.02 +17 07 09.9 r J75
2010-08-29 02:00:23 C 04 33 56.61 +13 29 11.2 u 160
2010-08-29 02:02:56 C 04 33 57.02 +13 29 09.5 u 160
2010-08-29 02:06:00 C 04 33 57.51 +13 29 07.8 u 160
2010-09-04 01:21:38 C 04 58 19.18 +11 42 21.2 u 160
2010-09-04 01:25:13 C 04 58 19.79 +11 42 18.0 u 160
2010-09-04 01:29:21 C 04 58 20.54 +11 42 14.9 u 160
2010-09-06 10:11:11 C 05 08 36.80 +10 52 12.1 17.6 c 704
2010-09-06 10:27:50 C 05 08 39.85 +10 51 56.9 18.0 c 704
2010-09-06 10:44:55 C 05 08 42.92 +10 51 41.8 18.6 c 704
2010-09-06 11:01:34 C 05 08 45.95 +10 51 26.0 18.3 c 704
2010-09-06 11:19:51 C 05 08 49.24 +10 51 08.8 18.2 c 704
2010-09-12 03:15:27 C 05 35 07.26 +08 30 45.4 u 160
2010-09-12 03:18:31 C 05 35 07.90 +08 30 41.6 u 160
2010-09-12 03:21:38 C 05 35 08.54 +08 30 38.0 u 160
2010-09-13 03:53:01 C 05 40 09.35 +08 02 10.1 u 160
2010-09-13 03:56:07 C 05 40 09.96 +08 02 06.3 u 160
2010-09-13 03:59:12 C 05 40 10.61 +08 02 02.7 u 160
2012-08-21 19:14:37 C 14 38 06.53 +07 52 17.4 u A78
2012-08-21 19:21:04 C 14 38 08.13 +07 52 06.2 u A78
2012-08-21 19:26:35 C 14 38 09.52 +07 51 57.3 u A78
2012-08-21 19:31:54 C 14 38 10.88 +07 51 47.9 u A78
2012-08-21 19:37:12 C 14 38 12.24 +07 51 38.9 u A78
2012-08-23 19:09:21 C 14 50 15.41 +06 28 54.4 u B38
2012-08-23 19:17:29 C 14 50 17.44 +06 28 40.5 u B38
2012-08-23 19:26:00 C 14 50 19.54 +06 28 25.3 u B38
2012-08-23 19:32:39 C 14 50 21.22 +06 28 13.8 u B38
2012-08-23 19:39:40 C 14 50 22.97 +06 28 01.7 u B38
2013-07-16 14:18:49 C 01 56 43.628 +19 01 20.00 L F51
2013-07-16 14:25:51 C 01 56 44.270 +19 01 20.42 L F51
2013-07-16 14:39:54 C 01 56 45.553 +19 01 21.16 L F51
2013-08-05 07:17:48 C 02 42 41.58 +18 29 32.6 r Y00
2013-08-05 07:24:16 C 02 42 42.21 +18 29 31.2 r Y00
2013-08-05 07:30:46 C 02 42 42.81 +18 29 29.8 r Y00
2013-09-05 03:38:30 C 04 07 33.24 +11 15 00.6 c A24
2013-09-05 03:39:32 C 04 07 33.30 +11 15 00.0 c A24
2013-09-07 00:08:32 C 04 13 43.36 +10 21 53.2 u 557
2013-09-07 00:57:43 C 04 13 50.15 +10 20 52.5 u 557
2013-09-07 01:46:57 C 04 13 56.91 +10 19 51.4 u 557
2013-09-07 02:34:52 C 04 14 03.47 +10 18 52.0 u 557
2013-09-07 03:06:38 C 04 14 07.85 +10 18 12.8 o 046
2013-09-07 03:11:46 C 04 14 08.55 +10 18 06.4 o 046
2013-09-07 03:13:32 C 04 14 08.77 +10 18 03.7 u 557
2013-09-07 03:14:13 C 04 14 08.87 +10 18 03.3 o 046
2013-09-07 03:16:28 C 04 14 09.18 +10 18 00.5 o 046
2013-09-08 00:07:31 C 04 17 07.40 +09 51 22.7 u 557
2013-09-08 00:56:20 C 04 17 14.26 +09 50 19.6 u 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)