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
2025-12-03 05:43:05 C 21 44 17.102 -27 16 17.98 V T05
2025-12-03 05:47:08 C 21 44 17.465 -27 16 17.94 V T05
2025-12-03 05:55:07 C 21 44 18.151 -27 16 17.40 V T05
2025-12-03 06:10:53 C 21 44 19.392 -27 16 16.86 V T05
2025-12-03 18:53:01 C 21 45 23.902 -27 15 29.52 V M22
2025-12-03 18:56:56 C 21 45 24.221 -27 15 28.94 V M22
2025-12-03 19:05:22 C 21 45 24.934 -27 15 28.98 V M22
2025-12-03 19:28:21 C 21 45 26.813 -27 15 27.54 V M22
2025-12-05 00:58:24 C 21 47 56.328 -27 13 55.42 V W68
2025-12-05 01:03:03 C 21 47 56.688 -27 13 54.98 V W68
2025-12-05 01:11:44 C 21 47 57.463 -27 13 54.77 V W68
2025-12-05 01:26:46 C 21 47 58.685 -27 13 52.72 V W68
2025-12-09 04:49:37 C 21 56 17.544 -27 07 43.79 V T05
2025-12-09 04:54:54 C 21 56 17.966 -27 07 43.72 V T05
2025-12-09 05:03:26 C 21 56 18.648 -27 07 43.03 V T05
2025-12-09 05:06:07 C 21 56 18.883 -27 07 43.21 V T05
2025-12-09 05:10:47 C 21 56 19.262 -27 07 42.31 V T05
2025-12-09 05:20:40 C 21 56 20.050 -27 07 41.27 V T05
2025-12-09 05:21:20 C 21 56 20.078 -27 07 41.52 V T05
2025-12-09 05:38:30 C 21 56 21.463 -27 07 40.04 V T05
2025-12-14 04:44:26 C 22 06 05.546 -26 58 18.30 V T05
2025-12-14 04:49:03 C 22 06 05.911 -26 58 18.41 V T05
2025-12-14 04:59:42 C 22 06 06.730 -26 58 16.79 V T05
2025-12-14 05:14:27 C 22 06 07.874 -26 58 15.42 V T05
2025-12-15 19:44:29 C 22 09 12.017 -26 54 44.60 V M22
2025-12-15 19:48:43 C 22 09 12.384 -26 54 43.99 V M22
2025-12-15 19:56:08 C 22 09 12.914 -26 54 43.06 V M22
2025-12-15 20:10:10 C 22 09 14.002 -26 54 42.23 V M22
2025-12-18 18:48:48 C 22 14 45.072 -26 48 25.38 V M22
2025-12-18 18:54:03 C 22 14 45.490 -26 48 25.56 V M22
2025-12-18 18:56:39 C 22 14 45.746 -26 48 24.70 V M22
2025-12-18 19:00:35 C 22 14 45.960 -26 48 24.62 V M22
2025-12-18 19:01:53 C 22 14 46.056 -26 48 24.44 V M22
2025-12-18 19:11:05 C 22 14 46.750 -26 48 23.51 V M22
2025-12-18 19:20:21 C 22 14 47.472 -26 48 22.90 V M22
2025-12-18 19:26:25 C 22 14 47.947 -26 48 21.89 V M22
2025-12-26 04:56:38 C 22 27 39.538 -26 33 01.62 V T05
2025-12-26 05:01:52 C 22 27 39.845 -26 33 01.33 V T05
2025-12-26 05:10:26 C 22 27 40.411 -26 33 00.22 V T05
2025-12-26 05:26:09 C 22 27 41.446 -26 32 58.38 V T05
2026-01-05 11:27:23 B 22 41 10.447 -26 18 37.04 V E41
2026-01-05 11:29:51 B 22 41 10.750 -26 18 36.11 V E41
2026-01-05 11:32:09 B 22 41 10.752 -26 18 35.53 V E41
2026-01-06 11:22:18 B 22 42 03.206 -26 18 03.28 V E41
2026-01-06 11:24:45 B 22 42 03.360 -26 18 02.56 V E41
2026-01-06 11:27:13 B 22 42 03.451 -26 18 02.66 V E41
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)