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
2013-09-08 01:47:51 C 04 17 21.47 +09 49 12.9 u 557
2013-09-08 02:33:25 C 04 17 27.83 +09 48 13.6 u 557
2013-09-08 03:07:19 C 04 17 32.54 +09 47 29.5 u 557
2013-09-10 00:22:24 C 04 24 09.15 +08 45 43.4 u 557
2013-09-10 01:05:58 C 04 24 15.50 +08 44 41.8 u 557
2013-09-14 11:02:02 C 04 40 42.75 +05 58 17.8 q 703
2013-09-14 11:09:18 C 04 40 43.89 +05 58 05.1 q 703
2013-09-14 11:16:35 C 04 40 45.05 +05 57 52.7 q 703
2013-09-14 11:23:49 C 04 40 46.17 +05 57 40.1 q 703
2013-09-21 07:02:27 C 05 09 44.66 +00 30 32.6 r Y00
2013-09-21 07:04:16 C 05 09 45.00 +00 30 28.1 r Y00
2013-09-21 07:06:04 C 05 09 45.33 +00 30 24.1 r Y00
2013-09-24 03:15:54 C 05 23 28.00 -02 15 30.1 c A24
2013-09-24 03:16:56 C 05 23 28.19 -02 15 32.1 c A24
2013-09-25 03:11:25 C 05 28 33.19 -03 17 50.1 c A24
2013-09-25 03:12:27 C 05 28 33.40 -03 17 51.6 c A24
2013-09-25 04:10:58 C 05 28 45.67 -03 20 28.9 c A24
2013-09-25 04:12:00 C 05 28 45.89 -03 20 29.9 c A24
2013-09-27 01:43:28 C 05 38 53.99 -05 25 35.3 u 557
2013-09-27 03:39:50 C 05 39 19.98 -05 31 06.1 u 557
2013-09-28 02:03:23 C 05 44 33.51 -06 35 46.2 u 557
2013-09-28 02:30:04 C 05 44 39.68 -06 37 04.6 u 557
2013-09-28 03:00:57 C 05 44 46.80 -06 38 35.3 u 557
2013-09-28 03:28:59 C 05 44 53.26 -06 39 57.5 u 557
2013-09-28 03:55:14 C 05 44 59.32 -06 41 14.7 u 557
2013-10-25 05:55:03 C 09 38 54.67 -38 46 41.5 r Y00
2013-10-25 05:56:20 C 09 38 55.29 -38 46 43.5 r Y00
2013-10-25 05:57:42 C 09 38 55.93 -38 46 44.9 r Y00
2016-06-10 10:18:27 C 00 33 44.99 +21 05 54.3 q H06
2016-06-10 10:19:43 C 00 33 45.07 +21 05 54.4 q H06
2016-06-13 10:07:35 C 00 38 38.79 +21 16 22.7 q H06
2016-06-13 10:08:55 C 00 38 38.89 +21 16 23.0 q H06
2016-06-13 10:11:27 C 00 38 39.06 +21 16 23.1 q H06
2016-06-22 02:33:41 C 00 53 21.18 +21 45 00.5 q 160
2016-06-22 02:35:56 C 00 53 21.25 +21 45 00.2 q 160
2016-06-22 02:38:10 C 00 53 21.34 +21 45 00.6 q 160
2016-07-05 09:01:33 C 01 16 31.30 +22 17 09.6 R G45
2016-07-05 09:08:32 C 01 16 31.78 +22 17 10.4 R G45
2016-07-05 09:22:42 C 01 16 32.81 +22 17 11.5 R G45
2016-07-05 09:31:14 C 01 16 33.41 +22 17 12.3 R G45
2016-07-11 03:18:37 C 01 26 35.90 +22 23 35.0 o Z22
2016-07-11 03:33:35 C 01 26 36.99 +22 23 35.6 o Z22
2016-07-11 03:44:41 C 01 26 37.76 +22 23 36.5 o Z22
2016-07-20 01:25:26 C 01 42 03.17 +22 20 09.5 q 160
2016-07-20 01:27:58 C 01 42 03.35 +22 20 09.4 q 160
2016-07-20 01:30:31 C 01 42 03.53 +22 20 09.3 q 160
2016-07-24 01:41:36 S 01 48 53.91 +22 12 11.8 L C51
2016-07-24 04:50:17 S 01 49 07.32 +22 11 51.3 L C51
2016-07-24 07:58:58 S 01 49 20.662 +22 11 30.48 L C51
2016-07-24 11:07:39 S 01 49 34.05 +22 11 09.1 L C51
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)