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
2025-08-09 22:50:18 B 19 44 45.44 +52 48 04.0 X L99
2025-08-09 22:52:21 B 19 44 45.20 +52 47 52.1 X L99
2025-08-09 22:54:24 B 19 44 44.88 +52 47 39.8 X L99
2025-08-09 23:06:52 C 19 44 44.479 +52 46 35.40 Z C23
2025-08-09 23:08:02 C 19 44 44.388 +52 46 27.73 Z C23
2025-08-09 23:09:11 C 19 44 44.062 +52 46 21.90 Z C23
2025-08-10 00:08:31 C 19 44 34.32 +52 40 46.3 V M32
2025-08-10 00:10:25 C 19 44 34.04 +52 40 35.7 V M32
2025-08-10 00:12:18 C 19 44 33.78 +52 40 24.6 V M32
2025-08-10 00:14:11 C 19 44 33.50 +52 40 14.2 V M32
2025-08-10 00:16:05 C 19 44 33.23 +52 40 03.5 V M32
2025-08-10 09:31:44 C 19 43 22.044 +51 48 51.44 V T08
2025-08-10 09:36:23 C 19 43 21.341 +51 48 25.24 V T08
2025-08-10 09:45:01 C 19 43 20.038 +51 47 36.60 V T08
2025-08-10 10:00:17 C 19 43 17.741 +51 46 10.34 V T08
2025-08-10 20:22:58 C 19 42 02.486 +50 47 20.54 Z C23
2025-08-10 20:24:38 C 19 42 02.287 +50 47 11.47 Z C23
2025-08-10 20:26:17 C 19 42 02.054 +50 47 02.36 Z C23
2025-08-10 20:46:30 C 19 41 57.23 +50 45 15.0 X C40
2025-08-10 20:48:55 C 19 41 56.89 +50 45 01.4 X C40
2025-08-10 20:51:19 C 19 41 56.56 +50 44 47.6 X C40
2025-08-10 20:53:44 C 19 41 56.22 +50 44 33.9 X C40
2025-08-10 20:56:09 C 19 41 55.90 +50 44 20.3 X C40
2025-08-10 20:58:33 C 19 41 55.56 +50 44 06.5 X C40
2025-08-10 21:00:58 C 19 41 55.23 +50 43 52.9 X C40
2025-08-10 21:03:23 C 19 41 54.89 +50 43 39.2 X C40
2025-08-10 21:05:41 C 19 41 54.58 +50 43 26.1 X C40
2025-08-10 21:07:54 C 19 41 54.27 +50 43 13.5 X C40
2025-08-10 21:10:07 C 19 41 53.97 +50 43 00.9 X C40
2025-08-10 21:12:08 B 19 41 56.422 +50 42 54.29 V R61
2025-08-10 21:12:18 C 19 41 53.67 +50 42 48.4 X C40
2025-08-10 21:14:46 C 19 41 55.33 +50 42 32.1 V D48
2025-08-10 21:21:42 C 19 41 54.39 +50 41 53.0 V D48
2025-08-10 21:26:14 B 19 41 54.473 +50 41 35.16 V R61
2025-08-10 21:28:20 C 19 41 53.47 +50 41 15.7 V D48
2025-08-10 21:31:14 C 19 41 53.08 +50 40 59.5 V D48
2025-08-10 21:40:19 B 19 41 52.493 +50 40 16.10 V R61
2025-08-10 21:54:24 B 19 41 50.513 +50 38 56.58 V R61
2025-08-10 21:56:00 B 19 41 49.320 +50 38 38.34 W G34
2025-08-10 21:59:12 B 19 41 48.871 +50 38 20.20 W G34
2025-08-10 22:00:48 B 19 41 48.646 +50 38 11.30 W G34
2025-08-10 22:05:37 B 19 41 47.997 +50 37 43.86 W G34
2025-08-10 22:35:20 C 19 41 43.37 +50 34 56.0 V M32
2025-08-10 22:36:54 C 19 41 43.13 +50 34 47.1 V M32
2025-08-10 22:38:29 C 19 41 42.92 +50 34 37.8 V M32
2025-08-10 22:40:03 C 19 41 42.73 +50 34 29.0 V M32
2025-08-10 22:41:38 C 19 41 42.49 +50 34 20.1 V M32
2025-08-10 22:43:12 C 19 41 42.30 +50 34 10.9 V M32
2025-08-10 22:44:28 C 19 41 42.12 +50 34 03.6 V M32
2025-08-10 22:57:19 C 19 41 41.503 +50 32 51.22 Z C23
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)