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
2025-08-22 21:47:50 B 19 22 20.225 +23 27 43.06 X J51
2025-08-22 21:58:16 B 19 22 19.788 +23 26 48.30 X J51
2025-08-22 22:04:05 C 19 22 18.03 +23 26 00.2 V M32
2025-08-22 22:06:12 C 19 22 17.96 +23 25 49.0 V M32
2025-08-22 22:08:17 C 19 22 17.88 +23 25 38.0 V M32
2025-08-22 22:10:23 C 19 22 17.81 +23 25 26.9 V M32
2025-08-22 22:12:28 C 19 22 17.73 +23 25 15.9 V M32
2025-08-22 22:14:48 C 19 22 19.116 +23 25 21.90 V R17
2025-08-22 22:41:24 C 19 22 18.012 +23 23 02.22 V R17
2025-08-22 23:03:30 C 19 22 17.095 +23 21 06.12 V R17
2025-08-22 23:27:05 C 19 22 16.130 +23 19 02.03 V R17
2025-08-23 18:50:08 C 19 21 46.12 +21 38 14.8 X C40
2025-08-23 18:51:45 C 19 21 46.06 +21 38 06.6 X C40
2025-08-23 18:53:21 C 19 21 46.01 +21 37 58.3 X C40
2025-08-23 18:54:51 C 19 21 45.95 +21 37 50.6 X C40
2025-08-23 18:56:15 C 19 21 45.90 +21 37 43.4 X C40
2025-08-23 18:57:40 C 19 21 45.86 +21 37 36.2 X C40
2025-08-23 18:59:04 C 19 21 45.82 +21 37 29.0 X C40
2025-08-23 19:01:34 C 19 21 45.74 +21 37 16.5 X C40
2025-08-23 19:04:10 C 19 21 45.64 +21 37 02.9 X C40
2025-08-23 19:05:40 C 19 21 45.59 +21 36 54.9 X C40
2025-08-23 19:07:11 C 19 21 45.51 +21 36 47.3 X C40
2025-08-23 19:09:11 C 19 21 45.45 +21 36 37.0 X C40
2025-08-23 21:00:58 B 19 21 42.818 +21 26 57.80 W M07
2025-08-23 21:45:51 B 19 21 41.376 +21 23 07.91 W M07
2025-08-23 21:54:05 C 19 21 41.254 +21 22 27.77 Z C23
2025-08-23 22:15:35 C 19 21 40.555 +21 20 37.00 Z C23
2025-08-23 22:54:23 C 19 21 39.305 +21 17 17.95 Z C23
2025-08-24 19:25:26 C 19 21 14.08 +19 33 48.7 V G17
2025-08-24 19:28:17 C 19 21 14.00 +19 33 34.5 V G17
2025-08-24 19:31:09 C 19 21 13.91 +19 33 20.3 V G17
2025-08-24 20:43:47 B 19 21 11.16 +19 27 13.2 X L99
2025-08-24 20:46:08 B 19 21 11.07 +19 27 01.1 X L99
2025-08-24 20:48:29 B 19 21 11.04 +19 26 49.6 X L99
2025-08-24 20:50:50 B 19 21 10.96 +19 26 37.3 X L99
2025-08-24 20:53:35 B 19 21 10.86 +19 26 24.2 X L99
2025-08-25 00:41:50 B 19 21 05.664 +19 07 44.58 Z J51
2025-08-25 00:50:35 B 19 21 05.414 +19 07 01.06 Z J51
2025-08-25 00:59:18 B 19 21 05.174 +19 06 17.46 Z J51
2025-08-25 18:45:45 C 19 20 48.33 +17 39 05.7 X C40
2025-08-25 18:48:10 C 19 20 48.26 +17 38 53.9 X C40
2025-08-25 18:50:35 C 19 20 48.20 +17 38 42.2 X C40
2025-08-25 18:53:00 C 19 20 48.15 +17 38 30.6 X C40
2025-08-25 18:55:24 C 19 20 48.08 +17 38 18.8 X C40
2025-08-25 18:57:49 C 19 20 48.02 +17 38 07.1 X C40
2025-08-25 19:00:14 C 19 20 47.95 +17 37 55.4 X C40
2025-08-25 19:02:39 C 19 20 47.89 +17 37 43.8 X C40
2025-08-25 19:04:58 C 19 20 47.84 +17 37 32.5 X C40
2025-08-25 19:07:10 C 19 20 47.78 +17 37 21.9 X C40
2025-08-25 19:09:22 C 19 20 47.73 +17 37 11.1 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)