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
2023-07-26 14:12:28 C 03 57 05.208 +15 45 17.46 V T05
2023-07-26 14:40:19 C 03 57 09.566 +15 45 18.40 V T05
2023-07-26 14:53:20 C 03 57 11.498 +15 45 19.08 V T05
2023-07-26 14:59:19 C 03 57 12.473 +15 45 18.97 V T05
2025-07-01 23:58:39 C 05 47 25.95 +67 05 44.9 V K88
2025-07-02 00:08:44 C 05 47 24.40 +67 06 10.6 V K88
2025-07-02 00:18:51 C 05 47 22.73 +67 06 35.7 V K88
2025-07-13 20:28:51 C 04 10 01.92 +78 11 12.0 Y 557
2025-07-13 21:24:08 C 04 09 26.72 +78 13 08.1 Y 557
2025-07-13 22:11:15 C 04 08 56.32 +78 14 48.7 Y 557
2025-07-13 23:26:46 C 04 08 06.88 +78 17 29.6 Y 557
2025-07-14 00:25:56 C 04 07 27.20 +78 19 36.9 Y 557
2025-07-14 01:17:09 C 04 06 52.44 +78 21 27.2 Y 557
2025-07-14 23:06:15 B 03 50 41.306 +79 04 54.62 W Z80
2025-07-14 23:11:17 B 03 50 37.526 +79 05 04.27 W Z80
2025-07-14 23:16:21 B 03 50 33.670 +79 05 14.64 W Z80
2025-07-19 20:46:20 C 01 35 10.42 +81 44 15.7 Y 557
2025-07-19 21:46:03 C 01 33 41.38 +81 44 49.4 Y 557
2025-07-19 22:45:17 C 01 32 12.04 +81 45 22.0 Y 557
2025-07-19 23:46:34 C 01 30 38.26 +81 45 54.5 Y 557
2025-07-20 00:46:10 C 01 29 06.15 +81 46 24.2 Y 557
2025-07-20 23:34:58 C 00 53 30.88 +81 49 35.5 Y 557
2025-07-20 23:39:58 B 00 53 25.678 +81 49 27.59 Z R50
2025-07-20 23:41:38 B 00 53 22.802 +81 49 27.70 Z R50
2025-07-20 23:43:18 B 00 53 20.179 +81 49 27.66 Z R50
2025-07-21 00:28:07 C 00 52 05.18 +81 49 34.2 Y 557
2025-07-21 01:21:16 C 00 50 38.90 +81 49 30.8 Y 557
2025-07-23 14:15:25 C 23 17 44.006 +80 57 33.37 V T05
2025-07-23 14:24:26 C 23 17 30.847 +80 57 19.44 V T05
2025-07-23 14:31:57 C 23 17 19.841 +80 57 07.88 V T05
2025-07-23 14:40:03 C 23 17 08.138 +80 56 54.64 V T05
2025-07-24 22:48:11 B 22 36 13.781 +79 56 12.70 Z R50
2025-07-24 22:49:52 B 22 36 11.801 +79 56 09.24 Z R50
2025-07-24 22:51:33 B 22 36 09.768 +79 56 05.75 Z R50
2025-07-25 14:09:28 C 22 18 47.662 +79 21 00.90 V T05
2025-07-25 14:16:03 C 22 18 40.296 +79 20 44.30 V T05
2025-07-25 14:23:02 C 22 18 32.424 +79 20 26.66 V T05
2025-07-25 14:28:41 C 22 18 26.110 +79 20 12.23 V T05
2025-07-25 23:50:10 B 22 09 00.384 +78 56 23.28 Z R49
2025-07-26 00:32:43 B 22 08 16.001 +78 54 35.39 Z R49
2025-07-26 01:00:34 B 22 07 46.946 +78 53 24.07 Z R49
2025-07-26 04:22:14 C 22 04 20.249 +78 44 35.81 V R17
2025-07-26 04:44:11 C 22 03 57.768 +78 43 35.69 V R17
2025-07-26 05:05:44 C 22 03 35.885 +78 42 36.14 V R17
2025-07-26 05:25:16 C 22 03 16.106 +78 41 41.89 V R17
2025-07-26 23:42:27 B 21 46 51.571 +77 50 06.76 Z R49
2025-07-27 00:25:51 B 21 46 12.701 +77 48 01.33 Z R49
2025-07-27 01:09:14 B 21 45 33.946 +77 45 54.68 Z R49
2025-07-27 09:10:17 C 21 39 03.055 +77 21 44.96 V T08
2025-07-27 09:19:07 C 21 38 55.555 +77 21 18.61 V T08
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)