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
2025-08-06 09:43:25 C 19 58 49.123 +60 25 12.86 V T08
2025-08-06 09:53:25 C 19 58 46.858 +60 24 21.06 V T08
2025-08-06 09:54:05 C 19 58 46.716 +60 24 17.68 V T08
2025-08-06 10:43:41 C 19 58 35.501 +60 20 00.78 V T08
2025-08-06 20:45:42 C 19 56 41.55 +59 27 46.5 V M32
2025-08-06 20:46:02 C 19 56 41.50 +59 27 44.8 V M32
2025-08-06 20:46:22 C 19 56 41.39 +59 27 43.0 V M32
2025-08-06 20:52:31 C 19 56 40.15 +59 27 11.1 V M32
2025-08-06 20:53:52 C 19 56 39.88 +59 27 03.8 V M32
2025-08-06 20:55:14 C 19 56 39.60 +59 26 57.1 V M32
2025-08-06 20:56:35 C 19 56 39.27 +59 26 50.1 V M32
2025-08-06 20:57:54 C 19 56 39.01 +59 26 43.3 V M32
2025-08-06 20:58:16 C 19 56 38.93 +59 26 41.3 V M32
2025-08-06 20:58:36 C 19 56 38.85 +59 26 39.6 V M32
2025-08-07 20:36:06 B 19 52 25.586 +57 22 06.56 W G34
2025-08-07 20:37:42 B 19 52 25.324 +57 21 58.67 W G34
2025-08-07 20:40:55 B 19 52 24.728 +57 21 40.97 W G34
2025-08-07 20:48:14 C 19 52 22.74 +57 21 06.4 Z L04
2025-08-07 20:49:55 C 19 52 22.41 +57 20 57.8 Z L04
2025-08-07 20:53:23 C 19 52 21.76 +57 20 39.4 Z L04
2025-08-07 20:56:41 C 19 52 21.13 +57 20 21.8 Z L04
2025-08-07 20:59:58 C 19 52 20.52 +57 20 04.2 Z L04
2025-08-07 21:01:28 C 19 52 20.22 +57 19 56.3 Z L04
2025-08-07 23:58:12 C 19 51 50.182 +57 04 27.16 V R17
2025-08-08 00:03:38 B 19 51 49.097 +57 03 57.89 X J51
2025-08-08 00:16:17 B 19 51 46.726 +57 02 49.92 X J51
2025-08-08 00:24:37 C 19 51 45.149 +57 02 05.42 V R17
2025-08-08 00:28:55 B 19 51 44.294 +57 01 41.81 X J51
2025-08-08 00:45:03 C 19 51 41.282 +57 00 15.44 V R17
2025-08-08 01:06:37 C 19 51 37.207 +56 58 18.98 V R17
2025-08-08 09:36:54 C 19 50 15.122 +56 12 42.01 V T05
2025-08-08 09:41:34 C 19 50 14.266 +56 12 16.78 V T05
2025-08-08 09:50:14 C 19 50 12.672 +56 11 29.51 V T05
2025-08-08 10:41:15 C 19 50 03.353 +56 06 51.52 V T05
2025-08-09 00:02:47 B 19 48 01.538 +54 54 11.41 X J51
2025-08-09 00:13:21 B 19 47 59.758 +54 53 13.38 X J51
2025-08-09 00:23:47 B 19 47 57.972 +54 52 16.18 X J51
2025-08-09 01:58:02 B 19 47 41.666 +54 43 22.69 Z R49
2025-08-09 02:40:33 B 19 47 34.838 +54 39 25.06 Z R49
2025-08-09 03:23:04 B 19 47 28.152 +54 35 26.88 Z R49
2025-08-09 20:25:18 C 19 45 08.815 +53 01 31.15 Z C23
2025-08-09 20:27:03 C 19 45 08.580 +53 01 21.65 Z C23
2025-08-09 20:28:13 C 19 45 08.402 +53 01 15.38 Z C23
2025-08-09 21:38:57 C 19 44 58.104 +52 54 44.24 Z J69
2025-08-09 21:42:48 C 19 44 57.514 +52 54 22.82 Z J69
2025-08-09 21:46:38 C 19 44 56.935 +52 54 01.55 Z J69
2025-08-09 21:50:40 C 19 44 56.318 +52 53 39.37 Z J69
2025-08-09 21:54:31 C 19 44 55.747 +52 53 17.99 Z J69
2025-08-09 22:46:12 B 19 44 46.12 +52 48 26.8 X L99
2025-08-09 22:48:15 B 19 44 45.85 +52 48 15.6 X L99
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)