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
2025-07-27 09:24:35 C 21 38 50.921 +77 21 02.52 V T08
2025-07-27 09:31:24 C 21 38 45.115 +77 20 42.18 V T08
2025-07-27 10:05:20 C 21 38 16.327 +77 19 00.55 V T08
2025-07-27 10:30:21 C 21 37 55.116 +77 17 44.92 V T08
2025-07-27 10:52:49 C 21 37 36.072 +77 16 36.44 V T08
2025-07-27 11:13:25 C 21 37 18.574 +77 15 33.37 V T08
2025-07-28 20:52:03 C 21 13 31.793 +75 24 04.86 Z C23
2025-07-28 21:23:30 C 21 13 15.422 +75 22 16.36 V R17
2025-07-28 21:43:57 C 21 13 02.155 +75 21 07.99 V R17
2025-07-28 21:48:37 C 21 12 54.694 +75 20 51.32 Z C23
2025-07-28 22:04:22 C 21 12 48.790 +75 19 59.59 V R17
2025-07-28 22:24:48 C 21 12 35.453 +75 18 50.62 V R17
2025-07-28 23:37:37 B 21 11 43.982 +75 14 33.25 W Z80
2025-07-28 23:43:58 B 21 11 39.878 +75 14 11.00 W Z80
2025-07-28 23:46:58 B 21 11 37.918 +75 14 00.82 W Z80
2025-07-29 20:40:22 C 20 59 33.01 +73 58 03.8 Y 557
2025-07-29 21:23:00 C 20 59 08.90 +73 55 27.6 Y 557
2025-07-29 21:55:49 C 20 58 50.32 +73 53 26.6 Y 557
2025-07-30 13:27:45 C 20 50 43.224 +72 54 12.85 V T08
2025-07-30 14:07:11 C 20 50 22.872 +72 51 33.77 V T08
2025-07-30 14:21:09 C 20 50 15.823 +72 50 37.39 V T08
2025-07-30 14:42:07 C 20 50 05.088 +72 49 12.25 V T08
2025-07-30 14:55:51 C 20 49 58.226 +72 48 16.52 V T08
2025-07-30 17:53:03 C 20 48 48.31 +72 36 36.8 X D04
2025-07-30 18:03:02 C 20 48 43.15 +72 35 56.9 X D04
2025-07-30 18:05:32 C 20 48 42.00 +72 35 47.3 X D04
2025-07-30 18:15:01 C 20 48 37.01 +72 35 09.8 X D04
2025-07-30 18:17:18 C 20 48 35.88 +72 35 00.0 X D04
2025-07-30 20:34:23 C 20 47 30.737 +72 25 57.18 Z C23
2025-07-30 20:35:38 C 20 47 30.062 +72 25 52.50 Z C23
2025-07-30 20:36:52 C 20 47 29.590 +72 25 47.39 Z C23
2025-07-30 20:49:47 C 20 47 21.97 +72 25 04.1 V M32
2025-07-30 20:52:10 C 20 47 20.79 +72 24 54.8 V M32
2025-07-30 20:54:35 C 20 47 19.61 +72 24 45.4 V M32
2025-07-30 20:56:59 C 20 47 18.43 +72 24 36.0 V M32
2025-07-30 20:59:22 C 20 47 17.24 +72 24 26.6 V M32
2025-07-30 21:32:54 B 20 46 58.76 +72 22 17.6 X L76
2025-07-30 21:36:06 B 20 46 57.22 +72 22 04.7 X L76
2025-07-30 21:39:19 B 20 46 55.62 +72 21 52.0 X L76
2025-07-30 21:42:32 B 20 46 54.02 +72 21 39.2 X L76
2025-07-30 21:45:45 B 20 46 52.39 +72 21 26.4 X L76
2025-07-30 21:48:58 B 20 46 50.84 +72 21 13.5 X L76
2025-07-30 21:52:11 B 20 46 49.24 +72 21 00.7 X L76
2025-07-30 21:55:24 B 20 46 47.64 +72 20 48.0 X L76
2025-07-30 21:58:36 B 20 46 46.09 +72 20 35.2 X L76
2025-07-30 22:01:49 B 20 46 44.50 +72 20 22.3 X L76
2025-07-31 10:29:32 C 20 41 11.902 +71 30 23.90 V T05
2025-07-31 10:33:30 C 20 41 10.032 +71 30 07.74 V T05
2025-07-31 10:42:18 C 20 41 05.930 +71 29 31.60 V T05
2025-07-31 11:27:17 C 20 40 44.906 +71 26 26.38 V T05
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)