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
2025-08-28 19:35:51 C 19 20 04.42 +12 03 45.1 X C40
2025-08-28 19:38:15 C 19 20 04.39 +12 03 34.5 X C40
2025-08-28 19:40:40 C 19 20 04.36 +12 03 24.0 X C40
2025-08-28 19:43:04 C 19 20 04.33 +12 03 13.5 X C40
2025-08-28 19:45:29 C 19 20 04.30 +12 03 02.9 X C40
2025-08-28 19:47:53 C 19 20 04.27 +12 02 52.4 X C40
2025-08-28 19:50:18 C 19 20 04.24 +12 02 41.9 X C40
2025-08-28 19:52:38 C 19 20 04.21 +12 02 31.8 X C40
2025-08-28 19:54:51 C 19 20 04.18 +12 02 22.2 X C40
2025-08-28 19:57:02 C 19 20 04.16 +12 02 12.5 X C40
2025-08-28 19:59:14 C 19 20 04.13 +12 02 02.8 X C40
2025-08-28 19:59:46 C 19 20 04.12 +12 02 00.3 X D04
2025-08-28 20:02:57 C 19 20 04.08 +12 01 46.3 X D04
2025-08-28 20:06:08 C 19 20 04.03 +12 01 32.5 X D04
2025-08-28 20:09:19 C 19 20 04.00 +12 01 18.6 X D04
2025-08-28 20:12:31 C 19 20 03.95 +12 01 04.6 X D04
2025-08-28 20:15:42 C 19 20 03.91 +12 00 50.6 X D04
2025-08-28 20:18:53 C 19 20 03.88 +12 00 36.8 X D04
2025-08-28 20:22:04 C 19 20 03.84 +12 00 23.0 X D04
2025-08-28 20:25:15 C 19 20 03.82 +12 00 09.1 X D04
2025-08-28 20:28:26 C 19 20 03.78 +11 59 54.7 X D04
2025-08-28 20:31:37 C 19 20 03.73 +11 59 41.0 X D04
2025-08-28 20:34:48 C 19 20 03.68 +11 59 27.3 X D04
2025-08-28 20:52:39 C 19 20 04.606 +11 58 07.36 Z C23
2025-08-28 21:12:10 C 19 20 04.380 +11 56 41.82 Z C23
2025-08-28 21:58:25 B 19 20 04.490 +11 53 35.56 X J51
2025-08-28 22:07:45 B 19 20 04.346 +11 52 54.91 X J51
2025-08-28 22:18:21 B 19 20 04.190 +11 52 08.80 X J51
2025-08-28 22:50:15 C 19 20 02.80 +11 49 35.1 V M32
2025-08-28 22:52:45 C 19 20 02.78 +11 49 24.3 V M32
2025-08-28 22:55:14 C 19 20 02.77 +11 49 13.5 V M32
2025-08-28 22:57:43 C 19 20 02.74 +11 49 02.6 V M32
2025-08-28 23:00:13 C 19 20 02.71 +11 48 51.6 V M32
2025-08-29 00:29:17 B 19 20 04.21 +11 43 02.8 Z X33
2025-08-29 00:31:50 B 19 20 04.19 +11 42 51.9 Z X33
2025-08-29 00:34:22 B 19 20 04.16 +11 42 40.6 Z X33
2025-08-29 18:45:45 C 19 20 01.08 +10 24 29.9 X D04
2025-08-29 18:49:10 C 19 20 01.07 +10 24 15.5 X D04
2025-08-29 18:52:35 C 19 20 01.03 +10 24 01.2 X D04
2025-08-29 19:01:48 C 19 20 00.92 +10 23 22.0 X D04
2025-08-29 19:04:58 C 19 20 00.88 +10 23 08.9 X D04
2025-08-29 19:08:08 C 19 20 00.86 +10 22 55.5 X D04
2025-08-29 19:11:18 C 19 20 00.82 +10 22 42.0 X D04
2025-08-29 19:14:27 C 19 20 00.81 +10 22 28.8 X D04
2025-08-29 19:17:38 C 19 20 00.78 +10 22 15.6 X D04
2025-08-29 19:20:18 C 19 20 00.76 +10 22 04.5 X C40
2025-08-29 19:20:48 C 19 20 00.75 +10 22 02.3 X D04
2025-08-29 19:22:42 C 19 20 00.74 +10 21 54.4 X C40
2025-08-29 19:23:57 C 19 20 00.74 +10 21 48.9 X D04
2025-08-29 19:25:07 C 19 20 00.71 +10 21 44.2 X C40
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)