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
2025-07-31 11:39:46 C 20 40 39.120 +71 25 34.64 V T05
2025-07-31 11:45:04 C 20 40 36.670 +71 25 12.58 V T05
2025-07-31 12:35:46 C 20 40 13.330 +71 21 40.54 V T05
2025-07-31 12:43:57 C 20 40 09.574 +71 21 06.26 V T05
2025-07-31 22:37:31 C 20 36 10.07 +70 39 52.1 V M32
2025-07-31 22:39:48 C 20 36 09.09 +70 39 42.5 V M32
2025-07-31 22:42:06 C 20 36 08.11 +70 39 32.8 V M32
2025-07-31 22:44:23 C 20 36 07.13 +70 39 23.2 V M32
2025-07-31 22:46:42 C 20 36 06.17 +70 39 13.4 V M32
2025-07-31 22:48:39 C 20 36 05.30 +70 39 05.4 V M32
2025-07-31 22:54:25 B 20 36 01.02 +70 38 39.9 X L76
2025-07-31 22:57:38 B 20 35 59.67 +70 38 26.3 X L76
2025-07-31 23:00:51 B 20 35 58.31 +70 38 12.4 X L76
2025-07-31 23:04:05 B 20 35 56.94 +70 37 58.8 X L76
2025-07-31 23:07:18 B 20 35 55.56 +70 37 45.1 X L76
2025-07-31 23:10:30 B 20 35 54.23 +70 37 31.5 X L76
2025-07-31 23:13:43 B 20 35 52.87 +70 37 17.7 X L76
2025-07-31 23:16:56 B 20 35 51.50 +70 37 04.0 X L76
2025-07-31 23:20:10 B 20 35 50.14 +70 36 50.2 X L76
2025-07-31 23:23:23 B 20 35 48.81 +70 36 36.4 X L76
2025-08-01 01:54:25 C 20 34 50.606 +70 26 16.73 V R17
2025-08-01 02:16:39 C 20 34 41.110 +70 24 41.90 V R17
2025-08-01 02:48:40 C 20 34 27.564 +70 22 24.42 V R17
2025-08-01 03:10:55 C 20 34 18.218 +70 20 48.41 V R17
2025-08-01 20:01:34 C 20 28 11.64 +69 08 06.5 Y 557
2025-08-01 21:04:44 C 20 27 48.09 +69 03 34.8 Y 557
2025-08-01 22:01:05 C 20 27 27.05 +68 59 30.3 Y 557
2025-08-01 23:01:14 C 20 27 04.60 +68 55 06.6 Y 557
2025-08-01 23:58:19 C 20 26 43.46 +68 50 54.4 Y 557
2025-08-02 00:51:46 C 20 26 23.87 +68 46 56.5 Y 557
2025-08-02 14:15:18 C 20 21 53.616 +67 47 14.86 V T08
2025-08-02 14:26:17 C 20 21 49.946 +67 46 23.74 V T08
2025-08-02 14:30:31 C 20 21 48.523 +67 46 03.54 V T08
2025-08-02 14:46:42 C 20 21 43.154 +67 44 47.87 V T08
2025-08-02 14:47:22 C 20 21 43.006 +67 44 44.41 V T08
2025-08-02 21:23:53 C 20 19 47.53 +67 14 52.6 V M32
2025-08-02 21:25:43 C 20 19 46.94 +67 14 44.4 V M32
2025-08-02 21:27:31 C 20 19 46.31 +67 14 36.0 V M32
2025-08-02 21:29:21 C 20 19 45.72 +67 14 27.8 V M32
2025-08-02 21:31:12 C 20 19 45.11 +67 14 19.4 V M32
2025-08-02 21:33:01 C 20 19 44.50 +67 14 11.1 V M32
2025-08-02 21:34:29 C 20 19 44.03 +67 14 04.4 V M32
2025-08-03 20:12:00 C 20 13 14.753 +65 28 48.58 X M26
2025-08-03 20:13:43 C 20 13 14.227 +65 28 40.22 X M26
2025-08-03 20:16:02 C 20 13 13.572 +65 28 29.60 X M26
2025-08-03 20:18:54 C 20 13 12.701 +65 28 16.14 X M26
2025-08-03 22:14:44 B 20 12 36.96 +65 19 06.0 X L99
2025-08-03 22:15:30 B 20 12 36.86 +65 19 03.4 X L99
2025-08-03 22:16:16 B 20 12 36.59 +65 18 59.4 X L99
2025-08-03 22:17:02 B 20 12 36.40 +65 18 56.2 X L99
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)