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
2025-09-13 17:57:06 C 19 26 45.30 -08 19 11.4 X C40
2025-09-13 17:59:29 C 19 26 45.37 -08 19 16.7 X C40
2025-09-13 18:01:54 C 19 26 45.44 -08 19 21.9 X C40
2025-09-13 18:04:18 C 19 26 45.51 -08 19 27.3 X C40
2025-09-13 18:06:35 C 19 26 45.58 -08 19 32.4 X C40
2025-09-13 18:08:48 C 19 26 45.64 -08 19 37.3 X C40
2025-09-13 18:11:01 C 19 26 45.71 -08 19 42.3 X C40
2025-09-13 18:13:13 C 19 26 45.77 -08 19 47.1 X C40
2025-09-13 19:10:12 C 19 26 47.40 -08 21 53.8 X D04
2025-09-13 19:12:45 C 19 26 47.50 -08 21 59.0 X D04
2025-09-13 19:15:18 C 19 26 47.58 -08 22 04.6 X D04
2025-09-13 19:25:31 C 19 26 47.84 -08 22 26.8 X D04
2025-09-13 19:30:30 C 19 26 48.01 -08 22 37.5 X D04
2025-09-13 19:32:51 C 19 26 48.09 -08 22 43.2 X D04
2025-09-13 19:35:11 C 19 26 48.12 -08 22 48.2 X D04
2025-09-13 19:37:31 C 19 26 48.21 -08 22 53.5 X D04
2025-09-14 18:43:30 C 19 27 37.99 -09 12 54.8 X C40
2025-09-14 18:46:30 C 19 27 38.08 -09 13 01.2 X C40
2025-09-14 18:49:31 C 19 27 38.15 -09 13 07.6 X C40
2025-09-14 18:52:31 C 19 27 38.27 -09 13 13.9 X C40
2025-09-14 18:55:31 C 19 27 38.36 -09 13 20.3 X C40
2025-09-14 18:58:32 C 19 27 38.45 -09 13 26.7 X C40
2025-09-14 19:01:32 C 19 27 38.55 -09 13 33.1 X C40
2025-09-14 19:04:34 C 19 27 38.64 -09 13 39.4 X C40
2025-09-14 19:07:34 C 19 27 38.74 -09 13 45.7 X C40
2025-09-14 19:10:35 C 19 27 38.83 -09 13 52.2 X C40
2025-09-14 19:13:35 C 19 27 38.93 -09 13 58.5 X C40
2025-09-14 19:16:36 C 19 27 39.02 -09 14 04.9 X C40
2025-09-14 19:31:16 C 19 27 40.598 -09 14 34.73 W 938
2025-09-14 19:36:20 C 19 27 40.752 -09 14 45.53 W 938
2025-09-14 19:41:24 C 19 27 40.898 -09 14 56.08 W 938
2025-09-14 19:52:52 C 19 27 41.251 -09 15 20.41 W 938
2025-09-14 20:02:59 C 19 27 41.554 -09 15 41.94 W 938
2025-09-14 20:08:02 C 19 27 41.705 -09 15 52.49 W 938
2025-09-14 20:13:05 C 19 27 41.856 -09 16 03.25 W 938
2025-09-15 19:37:20 C 19 28 33.61 -10 04 30.2 X D04
2025-09-15 19:38:55 B 19 28 34.253 -10 04 33.71 V 160
2025-09-15 19:39:51 C 19 28 33.69 -10 04 35.5 X D04
2025-09-15 19:41:31 B 19 28 34.351 -10 04 39.18 V 160
2025-09-15 19:43:29 C 19 28 33.79 -10 04 42.6 X C40
2025-09-15 19:44:07 B 19 28 34.435 -10 04 44.58 V 160
2025-09-15 19:44:51 C 19 28 33.87 -10 04 45.3 X D04
2025-09-15 19:45:30 C 19 28 33.87 -10 04 46.8 X C40
2025-09-15 19:47:31 C 19 28 33.93 -10 04 50.6 X C40
2025-09-15 19:49:32 C 19 28 34.01 -10 04 54.7 X C40
2025-09-15 19:51:33 C 19 28 34.07 -10 04 58.8 X C40
2025-09-15 19:53:32 C 19 28 34.15 -10 05 02.7 X C40
2025-09-15 19:55:33 C 19 28 34.20 -10 05 06.9 X C40
2025-09-15 19:57:33 C 19 28 34.27 -10 05 10.8 X C40
2025-09-15 19:59:33 C 19 28 34.33 -10 05 15.3 X D04
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)