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
2025-08-12 20:34:22 C 19 36 41.19 +46 12 15.5 V M32
2025-08-12 20:36:19 C 19 36 40.97 +46 12 04.3 V M32
2025-08-12 22:26:19 C 19 36 27.68 +46 01 25.8 X C40
2025-08-12 22:28:44 C 19 36 27.41 +46 01 11.8 X C40
2025-08-12 22:31:08 C 19 36 27.15 +46 00 57.8 X C40
2025-08-12 22:33:31 C 19 36 26.89 +46 00 43.8 X C40
2025-08-12 22:35:55 C 19 36 26.62 +46 00 29.8 X C40
2025-08-12 22:38:20 C 19 36 26.36 +46 00 15.8 X C40
2025-08-12 22:40:44 C 19 36 26.10 +46 00 01.6 X C40
2025-08-12 22:43:08 C 19 36 25.84 +45 59 47.6 X C40
2025-08-12 22:45:27 C 19 36 25.59 +45 59 34.1 X C40
2025-08-12 22:47:40 C 19 36 25.31 +45 59 21.2 X C40
2025-08-12 22:49:52 C 19 36 25.11 +45 59 08.3 X C40
2025-08-12 22:52:03 C 19 36 24.87 +45 58 55.4 X C40
2025-08-12 23:15:33 C 19 36 22.30 +45 56 37.5 X D04
2025-08-12 23:18:06 C 19 36 22.06 +45 56 22.6 X D04
2025-08-12 23:20:38 C 19 36 21.79 +45 56 07.8 X D04
2025-08-12 23:23:11 C 19 36 21.52 +45 55 53.0 X D04
2025-08-12 23:25:43 C 19 36 21.26 +45 55 37.9 X D04
2025-08-12 23:28:16 C 19 36 21.00 +45 55 23.3 X D04
2025-08-12 23:30:48 C 19 36 20.74 +45 55 08.4 X D04
2025-08-12 23:33:21 C 19 36 20.46 +45 54 53.1 X D04
2025-08-12 23:35:47 C 19 36 20.21 +45 54 39.2 X D04
2025-08-12 23:38:07 C 19 36 19.95 +45 54 25.4 X D04
2025-08-12 23:40:27 C 19 36 19.71 +45 54 11.9 X D04
2025-08-12 23:42:47 C 19 36 19.45 +45 53 58.1 X D04
2025-08-13 00:38:42 B 19 36 18.92 +45 49 22.9 Z X33
2025-08-13 00:41:15 B 19 36 18.59 +45 49 08.3 Z X33
2025-08-13 00:43:48 B 19 36 18.32 +45 48 53.4 Z X33
2025-08-13 20:29:56 B 19 34 25.32 +43 53 49.8 X L99
2025-08-13 20:33:56 B 19 34 24.92 +43 53 26.3 X L99
2025-08-13 20:35:56 B 19 34 24.76 +43 53 15.8 X L99
2025-08-13 21:33:04 C 19 34 19.24 +43 47 45.5 V M32
2025-08-13 21:34:59 C 19 34 19.04 +43 47 34.3 V M32
2025-08-13 21:36:54 C 19 34 18.85 +43 47 23.2 V M32
2025-08-13 21:38:50 C 19 34 18.65 +43 47 11.9 V M32
2025-08-13 21:40:44 C 19 34 18.51 +43 47 00.2 V M32
2025-08-13 22:51:26 C 19 34 10.51 +43 40 05.7 X C40
2025-08-13 22:53:50 C 19 34 10.27 +43 39 51.5 X C40
2025-08-13 22:56:15 C 19 34 10.04 +43 39 37.3 X C40
2025-08-13 22:58:46 C 19 34 09.80 +43 39 22.4 X C40
2025-08-13 23:01:17 C 19 34 09.55 +43 39 07.7 X C40
2025-08-13 23:03:42 C 19 34 09.32 +43 38 53.4 X C40
2025-08-13 23:06:06 C 19 34 09.09 +43 38 39.2 X C40
2025-08-13 23:08:25 C 19 34 08.87 +43 38 25.7 X C40
2025-08-13 23:10:37 C 19 34 08.66 +43 38 12.7 X C40
2025-08-13 23:12:49 C 19 34 08.44 +43 37 59.8 X C40
2025-08-13 23:14:54 C 19 34 08.22 +43 37 47.3 X D04
2025-08-13 23:15:01 C 19 34 08.23 +43 37 46.7 X C40
2025-08-13 23:17:14 C 19 34 08.02 +43 37 33.7 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)