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
2019-08-04 14:22:08 C 01 27 19.91 +27 03 25.6 V T05
2019-08-04 14:30:06 C 01 27 19.95 +27 03 22.0 V T05
2019-08-04 14:34:11 C 01 27 19.96 +27 03 20.2 V T05
2019-08-04 14:58:58 C 01 27 20.06 +27 03 08.9 V T05
2019-08-04 22:19:14 C 01 27 25.77 +26 59 28.5 q 557
2019-08-04 23:24:11 C 01 27 26.34 +26 58 59.8 q 557
2019-08-05 00:32:11 C 01 27 26.85 +26 58 29.6 q 557
2019-08-05 01:34:02 C 01 27 27.23 +26 58 01.6 q 557
2019-08-07 01:19:12 C 01 27 50.18 +26 34 09.6 q 160
2019-08-07 01:22:10 C 01 27 50.18 +26 34 08.1 q 160
2019-08-07 01:25:11 C 01 27 50.19 +26 34 06.5 q 160
2019-08-08 22:04:17 C 01 28 00.55 +26 08 56.2 q 557
2019-08-08 22:59:58 C 01 28 00.55 +26 08 24.8 q 557
2019-08-08 23:35:20 C 01 28 00.51 +26 08 04.6 q 557
2019-08-09 00:40:16 C 01 28 00.39 +26 07 27.5 q 557
2019-08-09 01:45:13 C 01 28 00.20 +26 06 49.8 q 557
2019-08-09 02:43:58 C 01 27 59.98 +26 06 15.1 q 557
2019-08-10 01:44:56 C 01 28 00.32 +25 52 05.3 q 160
2019-08-10 01:48:00 C 01 28 00.30 +25 52 03.4 q 160
2019-08-10 01:51:03 C 01 28 00.28 +25 52 01.5 q 160
2019-08-11 00:11:55 C 01 27 57.46 +25 37 25.6 q 160
2019-08-11 00:14:51 C 01 27 57.44 +25 37 23.7 q 160
2019-08-11 00:17:49 C 01 27 57.42 +25 37 21.8 q 160
2019-08-12 00:20:40 C 01 27 50.26 +25 20 46.3 q 160
2019-08-12 00:23:34 C 01 27 50.21 +25 20 44.4 q 160
2019-08-12 00:26:30 C 01 27 50.21 +25 20 42.4 q 160
2019-08-12 14:15:22 C 01 27 43.51 +25 10 55.7 V T05
2019-08-12 14:23:19 C 01 27 43.38 +25 10 49.8 V T05
2019-08-12 14:30:40 C 01 27 43.27 +25 10 44.5 V T05
2019-08-12 14:52:40 C 01 27 42.93 +25 10 28.2 V T05
2019-08-13 04:31:10 C 01 27 35.96 +25 00 11.6 16.2 q J43
2019-08-13 04:44:51 C 01 27 35.73 +25 00 01.1 16.2 q J43
2019-08-13 04:58:28 C 01 27 35.50 +24 59 50.8 16.1 q J43
2019-08-13 05:12:03 C 01 27 35.28 +24 59 40.3 16.0 q J43
2019-08-14 13:23:30 C 01 27 13.58 +24 34 15.8 V T08
2019-08-14 13:38:24 C 01 27 13.27 +24 34 03.8 V T08
2019-08-14 13:42:54 C 01 27 13.16 +24 34 00.1 V T08
2019-08-14 13:43:36 C 01 27 13.14 +24 33 59.2 V T08
2019-08-14 14:02:33 C 01 27 12.74 +24 33 43.9 V T08
2019-08-15 01:40:14 C 01 27 03.11 +24 23 49.3 q 160
2019-08-15 01:43:09 C 01 27 03.03 +24 23 46.9 q 160
2019-08-15 01:46:05 C 01 27 02.97 +24 23 44.4 q 160
2019-08-16 23:10:53 C 01 26 14.39 +23 42 59.6 q Z36
2019-08-16 23:27:29 C 01 26 14.00 +23 42 44.7 q Z36
2019-08-16 23:45:55 C 01 26 13.55 +23 42 27.9 q Z36
2019-08-18 13:14:34 C 01 25 18.31 +23 05 31.1 V T08
2019-08-18 13:19:12 C 01 25 18.14 +23 05 26.5 V T08
2019-08-18 13:36:37 C 01 25 17.53 +23 05 08.4 V T08
2019-08-18 13:45:06 C 01 25 17.23 +23 04 59.7 V T08
2019-08-19 00:55:18 C 01 24 59.20 +22 53 01.9 q 160
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)