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
2025-09-05 22:18:06 C 19 21 38.794 -00 02 02.29 V R17
2025-09-05 22:21:50 B 19 21 38.830 -00 02 14.14 X J51
2025-09-05 22:38:26 C 19 21 39.002 -00 03 05.94 V R17
2025-09-05 23:02:21 C 19 21 39.250 -00 04 20.71 V R17
2025-09-06 18:13:32 C 19 22 02.80 -01 03 24.5 X C40
2025-09-06 18:15:55 C 19 22 02.83 -01 03 31.7 X C40
2025-09-06 18:18:19 C 19 22 02.86 -01 03 38.9 X C40
2025-09-06 18:20:45 C 19 22 02.90 -01 03 46.3 X C40
2025-09-06 18:23:09 C 19 22 02.93 -01 03 53.6 X C40
2025-09-06 18:25:33 C 19 22 02.96 -01 04 00.9 X C40
2025-09-06 18:27:57 C 19 22 03.00 -01 04 08.0 X C40
2025-09-06 18:30:22 C 19 22 03.03 -01 04 15.2 X C40
2025-09-06 18:32:41 C 19 22 03.07 -01 04 22.4 X C40
2025-09-06 18:34:52 C 19 22 03.10 -01 04 28.9 X C40
2025-09-06 18:37:05 C 19 22 03.13 -01 04 35.5 X C40
2025-09-06 18:39:17 C 19 22 03.16 -01 04 42.2 X C40
2025-09-06 19:12:52 C 19 22 03.64 -01 06 24.0 X D04
2025-09-06 19:15:23 C 19 22 03.67 -01 06 31.8 X D04
2025-09-06 19:17:53 C 19 22 03.71 -01 06 39.2 X D04
2025-09-06 19:20:22 C 19 22 03.77 -01 06 46.3 X D04
2025-09-06 19:22:53 C 19 22 03.79 -01 06 53.5 X D04
2025-09-06 19:25:22 C 19 22 03.81 -01 07 01.0 X D04
2025-09-06 19:27:52 C 19 22 03.84 -01 07 08.8 X D04
2025-09-06 19:30:23 C 19 22 03.89 -01 07 16.2 X D04
2025-09-06 19:32:46 C 19 22 03.88 -01 07 23.5 X D04
2025-09-06 19:35:04 C 19 22 03.94 -01 07 30.3 X D04
2025-09-06 19:37:21 C 19 22 03.97 -01 07 36.8 X D04
2025-09-06 19:39:39 C 19 22 03.98 -01 07 44.2 X D04
2025-09-06 20:37:14 B 19 22 06.456 -01 10 29.82 X J51
2025-09-06 20:48:51 B 19 22 06.557 -01 11 04.13 X J51
2025-09-06 20:58:43 B 19 22 06.684 -01 11 33.90 X J51
2025-09-07 09:03:02 C 19 22 20.923 -01 47 20.62 V T08
2025-09-07 09:10:21 C 19 22 21.034 -01 47 42.07 V T08
2025-09-07 09:15:40 C 19 22 21.115 -01 47 57.66 V T08
2025-09-07 10:07:10 C 19 22 21.924 -01 50 28.54 V T08
2025-09-08 08:43:07 C 19 22 54.163 -02 55 23.45 V T08
2025-09-08 08:48:28 C 19 22 54.247 -02 55 38.50 V T08
2025-09-08 08:59:16 C 19 22 54.425 -02 56 08.88 V T08
2025-09-08 09:15:12 C 19 22 54.706 -02 56 53.59 V T08
2025-09-09 03:05:13 C 19 23 21.974 -03 45 44.86 V W68
2025-09-09 03:11:47 C 19 23 22.097 -03 46 02.78 V W68
2025-09-09 03:20:23 C 19 23 22.272 -03 46 26.11 V W68
2025-09-09 03:49:48 C 19 23 22.848 -03 47 45.85 V W68
2025-09-09 19:52:46 C 19 23 49.817 -04 31 24.96 Z C23
2025-09-09 20:09:55 C 19 23 50.198 -04 32 09.92 Z C23
2025-09-10 19:52:04 B 19 24 30.547 -05 33 18.43 V L65
2025-09-10 19:56:15 B 19 24 30.653 -05 33 28.94 V L65
2025-09-10 20:00:26 B 19 24 30.742 -05 33 39.49 V L65
2025-09-10 21:38:30 C 19 24 33.581 -05 37 37.20 V R17
2025-09-10 21:58:58 C 19 24 34.025 -05 38 28.61 V R17
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)