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
2025-08-10 22:58:33 C 19 41 41.239 +50 32 44.52 Z C23
2025-08-10 23:00:11 C 19 41 41.062 +50 32 34.76 Z C23
2025-08-11 19:47:58 C 19 39 18.617 +48 34 28.78 X M19
2025-08-11 20:00:42 C 19 39 17.004 +48 33 16.60 X M19
2025-08-11 20:10:16 C 19 39 16.080 +48 32 15.32 Z C23
2025-08-11 20:11:30 C 19 39 16.020 +48 32 08.05 Z C23
2025-08-11 20:12:45 C 19 39 15.790 +48 32 01.14 Z C23
2025-08-11 20:14:35 C 19 39 15.252 +48 31 57.40 X M19
2025-08-11 20:28:30 C 19 39 13.538 +48 30 38.59 X M19
2025-08-11 20:42:23 C 19 39 11.726 +48 29 19.68 X M19
2025-08-11 21:09:59 C 19 39 07.54 +48 26 38.5 X L18
2025-08-11 21:10:46 B 19 39 08.508 +48 26 32.93 Z K35
2025-08-11 21:10:54 C 19 39 07.40 +48 26 33.3 X L18
2025-08-11 21:11:21 B 19 39 08.441 +48 26 29.26 Z K35
2025-08-11 21:11:48 C 19 39 07.29 +48 26 28.0 X L18
2025-08-11 21:11:57 B 19 39 08.302 +48 26 25.80 Z K35
2025-08-11 21:12:34 B 19 39 08.285 +48 26 22.13 Z K35
2025-08-11 21:12:43 C 19 39 07.14 +48 26 22.7 X L18
2025-08-11 21:13:38 C 19 39 07.03 +48 26 17.5 X L18
2025-08-11 22:47:55 C 19 38 56.633 +48 17 16.22 Z C23
2025-08-11 22:49:34 C 19 38 56.465 +48 17 06.54 Z C23
2025-08-11 22:51:12 C 19 38 56.184 +48 16 57.43 Z C23
2025-08-11 23:37:43 C 19 38 48.80 +48 12 24.3 X D04
2025-08-11 23:39:48 C 19 38 48.58 +48 12 12.0 X D04
2025-08-11 23:41:53 C 19 38 48.31 +48 11 59.9 X D04
2025-08-11 23:43:58 C 19 38 48.10 +48 11 47.9 X D04
2025-08-11 23:46:03 C 19 38 47.84 +48 11 35.8 X D04
2025-08-11 23:48:08 C 19 38 47.58 +48 11 23.7 X D04
2025-08-11 23:50:13 C 19 38 47.36 +48 11 11.5 X D04
2025-08-11 23:52:17 C 19 38 47.10 +48 10 59.4 X D04
2025-08-11 23:54:23 C 19 38 46.88 +48 10 47.2 X D04
2025-08-11 23:56:28 C 19 38 46.64 +48 10 35.2 X D04
2025-08-11 23:58:32 C 19 38 46.40 +48 10 23.3 X D04
2025-08-12 00:00:37 C 19 38 46.15 +48 10 11.0 X D04
2025-08-12 00:14:16 B 19 38 49.72 +48 09 45.2 X X76
2025-08-12 00:17:30 B 19 38 49.29 +48 09 26.8 X X76
2025-08-12 00:20:26 B 19 38 48.92 +48 09 10.1 X X76
2025-08-12 09:02:18 C 19 37 51.202 +47 19 01.74 V T05
2025-08-12 09:04:17 C 19 37 50.945 +47 18 50.11 V T05
2025-08-12 09:14:17 C 19 37 49.699 +47 17 52.69 V T05
2025-08-12 09:16:16 C 19 37 49.454 +47 17 41.14 V T05
2025-08-12 09:26:14 C 19 37 48.206 +47 16 43.57 V T05
2025-08-12 09:38:13 C 19 37 46.726 +47 15 34.49 V T05
2025-08-12 09:40:12 C 19 37 46.474 +47 15 22.86 V T05
2025-08-12 20:11:16 C 19 36 44.690 +46 14 24.14 Z C23
2025-08-12 20:13:18 C 19 36 44.503 +46 14 11.90 Z C23
2025-08-12 20:15:46 C 19 36 44.206 +46 13 57.76 Z C23
2025-08-12 20:28:32 C 19 36 41.85 +46 12 49.1 V M32
2025-08-12 20:30:29 C 19 36 41.63 +46 12 37.9 V M32
2025-08-12 20:32:26 C 19 36 41.41 +46 12 26.6 V M32
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)