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
2025-08-18 22:12:22 C 19 26 02.88 +32 11 03.8 V M32
2025-08-18 22:14:15 C 19 26 02.76 +32 10 53.0 V M32
2025-08-18 22:16:09 C 19 26 02.64 +32 10 42.3 V M32
2025-08-18 22:18:03 C 19 26 02.52 +32 10 31.3 V M32
2025-08-18 22:19:40 C 19 26 02.43 +32 10 22.2 V M32
2025-08-18 22:51:43 C 19 26 01.248 +32 07 19.81 Z C23
2025-08-18 23:12:44 B 19 25 59.10 +32 05 15.5 X L99
2025-08-18 23:14:47 B 19 25 59.01 +32 05 04.4 X L99
2025-08-18 23:16:49 B 19 25 58.89 +32 04 51.5 X L99
2025-08-18 23:18:52 B 19 25 58.84 +32 04 40.5 X L99
2025-08-18 23:20:55 B 19 25 58.67 +32 04 28.4 X L99
2025-08-19 00:10:31 C 19 25 57.007 +32 00 12.64 V R17
2025-08-19 00:38:49 C 19 25 55.214 +31 57 31.32 V R17
2025-08-19 01:00:54 C 19 25 53.830 +31 55 25.18 V R17
2025-08-19 01:22:58 C 19 25 52.476 +31 53 18.96 V R17
2025-08-19 06:12:07 C 19 25 37.976 +31 25 46.11 V 851
2025-08-19 06:17:36 C 19 25 37.699 +31 25 14.89 V 851
2025-08-19 06:23:24 C 19 25 37.393 +31 24 41.78 V 851
2025-08-19 06:26:53 C 19 25 37.192 +31 24 21.88 V 851
2025-08-19 06:29:11 C 19 25 37.066 +31 24 08.65 V 851
2025-08-19 06:34:58 C 19 25 36.791 +31 23 35.56 V 851
2025-08-19 06:40:47 C 19 25 36.481 +31 23 02.42 V 851
2025-08-19 18:47:09 C 19 25 05.16 +30 15 13.5 X C40
2025-08-19 18:49:34 C 19 25 05.02 +30 15 00.0 X C40
2025-08-19 18:51:59 C 19 25 04.88 +30 14 46.6 X C40
2025-08-19 18:54:24 C 19 25 04.75 +30 14 33.1 X C40
2025-08-19 18:56:47 C 19 25 04.60 +30 14 19.6 X C40
2025-08-19 18:59:11 C 19 25 04.47 +30 14 06.2 X C40
2025-08-19 19:01:36 C 19 25 04.33 +30 13 52.7 X C40
2025-08-19 19:04:01 C 19 25 04.19 +30 13 39.3 X C40
2025-08-19 19:06:19 C 19 25 04.06 +30 13 26.3 X C40
2025-08-19 19:08:32 C 19 25 03.94 +30 13 13.9 X C40
2025-08-19 19:10:44 C 19 25 03.81 +30 13 01.6 X C40
2025-08-19 19:12:57 C 19 25 03.69 +30 12 49.2 X C40
2025-08-20 00:09:32 C 19 24 48.44 +29 45 01.0 V M32
2025-08-20 00:11:25 C 19 24 48.36 +29 44 50.1 V M32
2025-08-20 00:13:19 C 19 24 48.25 +29 44 39.7 V M32
2025-08-20 00:15:12 C 19 24 48.16 +29 44 29.1 V M32
2025-08-20 00:17:05 C 19 24 48.07 +29 44 18.5 V M32
2025-08-20 20:35:05 B 19 23 59.801 +27 52 01.02 V L65
2025-08-20 20:39:17 B 19 23 59.594 +27 51 37.94 V L65
2025-08-20 20:43:28 B 19 23 59.386 +27 51 14.90 V L65
2025-08-20 22:57:19 B 19 23 53.758 +27 39 20.12 X J51
2025-08-20 23:07:04 B 19 23 53.244 +27 38 26.41 X J51
2025-08-20 23:15:36 B 19 23 52.786 +27 37 39.86 X J51
2025-08-20 23:31:43 C 19 23 50.83 +27 35 49.4 V M32
2025-08-20 23:34:02 C 19 23 50.73 +27 35 36.4 V M32
2025-08-20 23:36:02 C 19 23 50.64 +27 35 25.4 V M32
2025-08-20 23:38:21 C 19 23 50.53 +27 35 12.7 V M32
2025-08-20 23:40:39 C 19 23 50.42 +27 34 59.6 V M32
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)