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
2009-08-16 03:09:45 C 15 02 25.90 +16 43 47.2 r H53
2009-08-16 03:11:45 C 15 02 26.40 +16 43 42.0 r H53
2009-08-17 02:28:33 C 15 08 56.84 +15 45 19.5 r H53
2009-08-17 02:32:34 C 15 08 58.03 +15 45 07.4 r H53
2009-08-17 02:34:35 C 15 08 58.47 +15 45 03.7 r H53
2009-08-17 02:36:35 C 15 08 59.13 +15 44 58.0 r H53
2009-08-17 02:39:33 C 15 08 59.90 +15 44 50.8 r H53
2009-08-18 21:35:28 C 15 20 39.80 +13 56 43.0 c B67
2009-08-18 21:46:15 C 15 20 42.80 +13 56 16.1 c B67
2009-08-19 20:20:50 C 15 26 40.89 +12 59 34.5 w J10
2009-08-19 20:38:24 C 15 26 45.53 +12 58 50.5 w J10
2009-08-20 03:07:10 C 15 28 26.90 +12 42 37.2 17.1 c 704
2009-08-20 03:25:14 C 15 28 31.55 +12 41 52.0 17.3 c 704
2009-08-20 03:43:14 C 15 28 36.25 +12 41 06.6 17.7 c 704
2009-08-20 04:01:18 C 15 28 40.80 +12 40 20.8 17.3 c 704
2009-08-20 04:19:19 C 15 28 45.41 +12 39 35.5 17.4 c 704
2009-08-23 02:14:21 C 15 46 23.09 +09 45 56.9 r H53
2009-08-23 02:16:22 C 15 46 23.54 +09 45 51.9 r H53
2009-08-23 02:18:22 C 15 46 24.00 +09 45 46.8 r H53
2009-08-23 02:20:22 C 15 46 24.64 +09 45 42.0 r H53
2009-08-23 02:22:22 C 15 46 25.00 +09 45 37.1 r H53
2009-08-23 02:24:21 C 15 46 25.46 +09 45 32.0 r H53
2009-08-31 19:58:38 C 16 33 12.76 +01 44 15.0 w 160
2009-08-31 20:00:52 C 16 33 13.20 +01 44 10.3 w 160
2009-08-31 20:01:34 C 16 33 13.32 +01 44 09.0 w 160
2009-08-31 20:03:00 C 16 33 13.61 +01 44 05.8 w 160
2009-09-01 23:21:29 C 16 38 44.26 +00 47 39.5 r 808
2009-09-01 23:32:00 C 16 38 46.30 +00 47 18.0 r 808
2009-09-01 23:42:30 C 16 38 48.34 +00 46 57.7 r 808
2009-09-04 18:04:07 C 16 51 40.45 -01 25 12.3 r 585
2009-09-04 18:07:24 C 16 51 41.06 -01 25 18.9 r 585
2009-09-04 18:14:17 C 16 51 42.31 -01 25 31.7 r 585
2009-09-04 18:15:58 C 16 51 42.70 -01 25 35.0 r 585
2009-09-04 18:23:28 C 16 51 44.03 -01 25 49.1 r 585
2009-09-04 18:25:05 C 16 51 44.33 -01 25 52.5 r 585
2009-09-04 18:27:56 C 16 51 44.90 -01 25 58.2 r 585
2009-10-22 09:55:59 C 19 33 48.38 -20 18 40.5 r E12
2009-10-22 10:09:40 C 19 33 49.96 -20 18 45.3 r E12
2009-10-22 10:37:10 C 19 33 53.13 -20 18 54.6 r E12
2009-11-18 16:15:42 C 20 47 52.17 -21 59 06.5 18.2 o C20
2009-11-18 16:39:32 C 20 47 54.78 -21 59 05.9 18.5 o C20
2009-11-24 16:12:58 C 21 03 41.48 -21 52 42.9 17.7 o C20
2010-01-07 16:03:18 C 22 58 04.16 -17 33 53.2 19.1 u C20
2010-01-07 16:05:25 C 22 58 04.41 -17 33 52.2 19.7 u C20
2010-04-20 01:13:43 C 22 47 26.55 +05 27 12.9 18.8 u C20
2010-04-29 00:48:22 C 23 07 47.34 +07 10 03.8 17.7 u C20
2010-04-29 00:50:29 C 23 07 47.53 +07 10 04.7 18.3 u C20
2010-06-17 10:44:12 C 01 05 18.60 +14 51 30.2 r G96
2010-06-17 10:50:13 C 01 05 19.21 +14 51 32.0 r G96
2010-06-17 10:56:11 C 01 05 19.82 +14 51 33.8 r G96
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)