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
2006-11-17 02:35:09 C 21 00 37.98 -24 26 34.9 18.6 c 704
2006-11-23 10:41:00 C 21 15 30.63 -24 25 54.6 r E12
2006-11-23 10:53:35 C 21 15 31.86 -24 25 54.3 r E12
2006-11-23 11:05:59 C 21 15 33.04 -24 25 54.5 r E12
2006-11-23 11:18:20 C 21 15 34.30 -24 25 52.8 r E12
2006-12-19 10:46:19 C 22 16 24.34 -23 05 34.9 r E12
2006-12-19 10:52:07 C 22 16 24.92 -23 05 33.8 r E12
2007-06-25 10:57:56 C 01 41 30.55 +14 30 23.7 r 703
2007-06-25 11:00:22 C 01 41 30.84 +14 30 25.2 r 703
2007-06-25 11:02:50 C 01 41 31.09 +14 30 26.3 r 703
2007-06-25 11:05:21 C 01 41 31.34 +14 30 26.2 r 703
2007-07-10 19:07:41 C 02 23 39.62 +15 50 51.5 r E12
2007-07-10 19:15:41 C 02 23 40.63 +15 50 52.6 r E12
2007-07-10 19:23:33 C 02 23 41.46 +15 50 53.5 r E12
2007-07-10 19:31:29 C 02 23 42.36 +15 50 55.6 r E12
2007-07-19 10:27:32 C 02 48 55.62 +16 16 37.0 r G96
2007-07-19 10:34:34 C 02 48 56.48 +16 16 37.7 r G96
2007-07-19 10:41:38 C 02 48 57.38 +16 16 38.2 r G96
2007-07-19 10:48:31 C 02 48 58.21 +16 16 39.6 r 703
2007-07-19 10:48:38 C 02 48 58.24 +16 16 38.9 r G96
2007-07-19 10:55:32 C 02 48 59.07 +16 16 39.8 r 703
2007-07-19 11:02:35 C 02 48 59.94 +16 16 40.5 r 703
2007-07-19 11:09:38 C 02 49 00.76 +16 16 39.0 r 703
2007-08-08 09:42:27 C 03 53 54.48 +16 03 18.5 18.6 c 704
2007-08-08 09:59:03 C 03 53 56.95 +16 03 15.9 19.0 c 704
2007-08-08 10:15:38 C 03 53 59.40 +16 03 12.9 18.5 c 704
2007-08-08 10:32:22 C 03 54 01.79 +16 03 09.8 19.0 c 704
2007-08-09 09:31:03 C 03 57 27.21 +15 59 18.7 18.0 c 704
2007-08-09 09:48:16 C 03 57 29.73 +15 59 16.0 18.2 c 704
2007-08-09 10:05:19 C 03 57 32.25 +15 59 12.8 18.3 c 704
2007-08-09 10:22:18 C 03 57 34.79 +15 59 10.1 18.4 c 704
2007-08-11 09:26:05 C 04 04 41.79 +15 50 06.1 18.7 c 704
2007-08-11 09:43:08 C 04 04 44.39 +15 50 02.9 18.9 c 704
2007-08-11 10:00:10 C 04 04 46.98 +15 49 59.9 18.7 c 704
2007-08-11 10:17:39 C 04 04 49.57 +15 49 55.9 18.7 c 704
2007-08-11 10:34:41 C 04 04 52.18 +15 49 52.4 18.8 c 704
2007-08-14 09:35:14 C 04 15 53.55 +15 33 14.1 18.5 c 704
2007-08-14 09:52:20 C 04 15 56.25 +15 33 09.9 18.8 c 704
2007-08-14 10:09:38 C 04 15 58.91 +15 33 05.5 19.1 c 704
2007-08-14 10:26:45 C 04 16 01.61 +15 33 00.8 18.9 c 704
2007-08-14 10:43:51 C 04 16 04.29 +15 32 56.8 18.8 c 704
2009-08-14 02:55:18 C 14 48 33.16 +18 43 33.7 r H53
2009-08-14 02:58:18 C 14 48 34.04 +18 43 26.3 r H53
2009-08-14 03:01:18 C 14 48 34.88 +18 43 19.3 r H53
2009-08-14 03:04:32 C 14 48 35.90 +18 43 10.8 r H53
2009-08-14 03:08:45 C 14 48 37.05 +18 43 00.6 r H53
2009-08-14 03:11:45 C 14 48 37.89 +18 42 52.7 r H53
2009-08-16 03:01:46 C 15 02 23.60 +16 44 06.8 r H53
2009-08-16 03:03:46 C 15 02 24.19 +16 44 01.3 r H53
2009-08-16 03:05:45 C 15 02 24.73 +16 43 56.7 r H53
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)