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
2025-08-13 23:18:44 C 19 34 07.85 +43 37 24.7 X D04
2025-08-13 23:22:33 C 19 34 07.49 +43 37 02.2 X D04
2025-08-13 23:26:23 C 19 34 07.13 +43 36 39.5 X D04
2025-08-13 23:33:03 C 19 34 06.49 +43 36 00.4 X D04
2025-08-13 23:39:42 C 19 34 05.87 +43 35 21.3 X D04
2025-08-13 23:43:31 C 19 34 05.52 +43 34 58.7 X D04
2025-08-13 23:47:21 C 19 34 05.14 +43 34 36.3 X D04
2025-08-13 23:51:10 C 19 34 04.78 +43 34 13.9 X D04
2025-08-13 23:54:52 C 19 34 04.44 +43 33 51.9 X D04
2025-08-13 23:58:28 C 19 34 04.09 +43 33 30.8 X D04
2025-08-14 00:02:04 C 19 34 03.75 +43 33 09.5 X D04
2025-08-14 20:08:38 C 19 32 26.239 +41 36 29.52 Z C23
2025-08-14 20:10:43 C 19 32 26.078 +41 36 17.57 Z C23
2025-08-14 20:13:11 C 19 32 25.819 +41 36 03.24 Z C23
2025-08-14 22:22:31 B 19 32 12.77 +41 23 29.4 X L99
2025-08-14 22:23:51 B 19 32 12.65 +41 23 22.4 X L99
2025-08-14 22:25:11 B 19 32 12.43 +41 23 13.6 X L99
2025-08-14 22:26:31 B 19 32 12.43 +41 23 05.7 X L99
2025-08-14 22:27:51 B 19 32 12.25 +41 22 57.2 X L99
2025-08-14 22:50:36 C 19 32 11.306 +41 20 48.80 Z C23
2025-08-14 22:51:25 C 19 32 11.292 +41 20 43.98 Z C23
2025-08-14 22:52:14 C 19 32 11.146 +41 20 39.30 Z C23
2025-08-14 23:55:14 C 19 32 06.197 +41 14 53.41 V R17
2025-08-15 00:24:51 C 19 32 03.367 +41 12 00.14 V R17
2025-08-15 00:45:17 C 19 32 01.435 +41 10 00.37 V R17
2025-08-15 01:05:36 C 19 31 59.510 +41 08 01.14 V R17
2025-08-15 19:50:39 C 19 30 36.07 +39 18 52.5 X C40
2025-08-15 19:52:40 C 19 30 35.91 +39 18 40.8 X C40
2025-08-15 19:54:34 C 19 30 35.74 +39 18 29.6 X C40
2025-08-15 19:56:22 C 19 30 35.59 +39 18 19.1 X C40
2025-08-15 19:58:10 C 19 30 35.43 +39 18 08.6 X C40
2025-08-15 19:59:58 C 19 30 35.28 +39 17 58.1 X C40
2025-08-15 20:01:47 C 19 30 35.12 +39 17 47.6 X C40
2025-08-15 20:03:36 C 19 30 34.96 +39 17 37.0 X C40
2025-08-15 20:05:25 C 19 30 34.81 +39 17 26.5 X C40
2025-08-15 20:07:14 C 19 30 34.66 +39 17 16.0 X C40
2025-08-15 20:07:35 C 19 30 36.274 +39 17 07.30 Z C23
2025-08-15 20:09:02 C 19 30 34.50 +39 17 05.4 X C40
2025-08-15 20:10:27 C 19 30 36.043 +39 16 51.24 Z C23
2025-08-15 20:10:51 C 19 30 34.35 +39 16 55.0 X C40
2025-08-15 20:14:34 C 19 30 35.712 +39 16 27.26 Z C23
2025-08-15 20:38:33 C 19 30 32.86 +39 14 11.6 V M32
2025-08-15 20:40:35 C 19 30 32.69 +39 13 59.7 V M32
2025-08-15 20:42:34 C 19 30 32.53 +39 13 48.3 V M32
2025-08-15 20:44:33 C 19 30 32.35 +39 13 36.7 V M32
2025-08-15 20:46:28 C 19 30 32.19 +39 13 25.5 V M32
2025-08-15 21:56:37 C 19 30 27.161 +39 06 36.11 Z C23
2025-08-15 21:58:40 C 19 30 26.990 +39 06 24.08 Z C23
2025-08-15 23:13:28 B 19 30 24.10 +38 59 52.8 X X76
2025-08-15 23:16:35 B 19 30 23.82 +38 59 34.7 X X76
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)