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
2025-08-25 19:11:34 C 19 20 47.67 +17 37 00.6 X C40
2025-08-25 22:32:38 C 19 20 43.53 +17 20 44.8 V M32
2025-08-25 22:34:56 C 19 20 43.48 +17 20 33.7 V M32
2025-08-25 22:37:14 C 19 20 43.43 +17 20 22.5 V M32
2025-08-25 22:39:32 C 19 20 43.38 +17 20 11.3 V M32
2025-08-25 22:41:50 C 19 20 43.33 +17 20 00.2 V M32
2025-08-26 17:28:33 C 19 20 29.33 +15 50 39.4 q 168
2025-08-26 17:56:43 C 19 20 28.80 +15 48 26.8 q 168
2025-08-26 18:22:51 C 19 20 28.31 +15 46 24.2 q 168
2025-08-26 18:52:40 C 19 20 27.76 +15 44 04.1 q 168
2025-08-26 19:24:51 C 19 20 27.21 +15 41 33.1 q 168
2025-08-26 19:32:07 C 19 20 27.44 +15 41 07.3 X C40
2025-08-26 19:34:38 C 19 20 27.39 +15 40 55.4 X C40
2025-08-26 19:37:03 C 19 20 27.34 +15 40 44.0 X C40
2025-08-26 19:39:27 C 19 20 27.29 +15 40 32.7 X C40
2025-08-26 19:41:51 C 19 20 27.24 +15 40 21.6 X C40
2025-08-26 19:44:16 C 19 20 27.19 +15 40 10.3 X C40
2025-08-26 19:46:41 C 19 20 27.13 +15 39 59.0 X C40
2025-08-26 19:49:05 C 19 20 27.08 +15 39 47.6 X C40
2025-08-26 19:51:23 C 19 20 27.04 +15 39 36.8 X C40
2025-08-26 19:53:36 C 19 20 26.99 +15 39 26.4 X C40
2025-08-26 19:55:49 C 19 20 26.95 +15 39 16.0 X C40
2025-08-26 19:58:02 C 19 20 26.90 +15 39 05.6 X C40
2025-08-26 20:09:15 C 19 20 26.67 +15 38 12.7 X D04
2025-08-26 20:11:48 C 19 20 26.63 +15 38 00.8 X D04
2025-08-26 20:14:21 C 19 20 26.58 +15 37 48.8 X D04
2025-08-26 20:16:54 C 19 20 26.53 +15 37 36.8 X D04
2025-08-26 20:19:26 C 19 20 26.47 +15 37 24.9 X D04
2025-08-26 20:21:59 C 19 20 26.43 +15 37 12.9 X D04
2025-08-26 20:24:32 C 19 20 26.38 +15 37 01.0 X D04
2025-08-26 20:27:05 C 19 20 26.32 +15 36 48.9 X D04
2025-08-26 20:29:32 C 19 20 26.27 +15 36 37.6 X D04
2025-08-26 20:31:52 C 19 20 26.24 +15 36 26.5 X D04
2025-08-26 20:34:13 C 19 20 26.20 +15 36 15.6 X D04
2025-08-26 20:36:34 C 19 20 26.15 +15 36 04.5 X D04
2025-08-26 23:47:47 B 19 20 26.07 +15 21 48.6 Z X33
2025-08-26 23:50:20 B 19 20 26.01 +15 21 36.8 Z X33
2025-08-26 23:52:53 B 19 20 25.98 +15 21 24.7 Z X33
2025-08-27 20:11:53 C 19 20 13.24 +13 47 37.5 V M32
2025-08-27 20:14:19 C 19 20 13.20 +13 47 26.5 V M32
2025-08-27 20:16:42 C 19 20 13.16 +13 47 15.6 V M32
2025-08-27 20:19:06 C 19 20 13.12 +13 47 04.8 V M32
2025-08-27 20:21:29 C 19 20 13.08 +13 46 54.0 V M32
2025-08-27 21:20:38 B 19 20 12.04 +13 42 24.9 X L99
2025-08-27 21:22:38 B 19 20 11.93 +13 42 15.7 X L99
2025-08-27 21:24:38 B 19 20 11.95 +13 42 07.1 X L99
2025-08-27 21:26:18 B 19 20 11.87 +13 41 59.5 X L99
2025-08-27 21:27:38 B 19 20 11.89 +13 41 53.7 X L99
2025-08-27 21:28:58 B 19 20 11.81 +13 41 46.4 X L99
2025-08-28 19:33:26 C 19 20 04.45 +12 03 55.6 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)