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
2025-08-15 23:19:26 B 19 30 23.57 +38 59 18.5 X X76
2025-08-16 20:00:39 B 19 28 57.06 +36 58 45.0 X L99
2025-08-16 20:02:39 B 19 28 56.91 +36 58 32.2 X L99
2025-08-16 20:04:19 B 19 28 56.74 +36 58 22.9 X L99
2025-08-16 20:05:59 B 19 28 56.70 +36 58 13.6 X L99
2025-08-16 21:45:43 B 19 28 49.966 +36 48 34.67 W M07
2025-08-16 22:32:52 B 19 28 46.514 +36 43 59.99 W M07
2025-08-17 20:30:16 C 19 27 26.47 +34 37 42.3 X C40
2025-08-17 20:32:40 C 19 27 26.30 +34 37 28.4 X C40
2025-08-17 20:35:05 C 19 27 26.13 +34 37 14.5 X C40
2025-08-17 20:37:29 C 19 27 25.97 +34 37 00.6 X C40
2025-08-17 20:39:54 C 19 27 25.80 +34 36 46.7 X C40
2025-08-17 20:42:19 C 19 27 25.64 +34 36 32.9 X C40
2025-08-17 20:44:43 C 19 27 25.47 +34 36 19.0 X C40
2025-08-17 20:47:08 C 19 27 25.31 +34 36 05.1 X C40
2025-08-17 20:49:27 C 19 27 25.14 +34 35 51.7 X C40
2025-08-17 20:51:40 C 19 27 25.00 +34 35 38.9 X C40
2025-08-17 20:53:53 C 19 27 24.84 +34 35 26.1 X C40
2025-08-17 20:56:06 C 19 27 24.69 +34 35 13.3 X C40
2025-08-17 21:08:51 C 19 27 23.82 +34 33 59.3 X D04
2025-08-17 21:11:24 C 19 27 23.66 +34 33 44.7 X D04
2025-08-17 21:13:57 C 19 27 23.48 +34 33 30.1 X D04
2025-08-17 21:16:30 C 19 27 23.31 +34 33 15.2 X D04
2025-08-17 21:19:02 C 19 27 23.14 +34 33 00.7 X D04
2025-08-17 21:21:35 C 19 27 22.96 +34 32 46.0 X D04
2025-08-17 21:24:08 C 19 27 22.80 +34 32 31.3 X D04
2025-08-17 21:26:40 C 19 27 22.61 +34 32 16.5 X D04
2025-08-17 21:29:07 C 19 27 22.43 +34 32 02.5 X D04
2025-08-17 21:31:27 C 19 27 22.29 +34 31 49.1 X D04
2025-08-17 21:33:47 C 19 27 22.13 +34 31 35.5 X D04
2025-08-17 21:36:07 C 19 27 21.98 +34 31 21.9 X D04
2025-08-18 00:18:17 C 19 27 15.30 +34 16 41.7 X X76
2025-08-18 00:21:59 C 19 27 15.02 +34 16 20.7 X X76
2025-08-18 00:25:22 C 19 27 14.77 +34 16 01.5 X X76
2025-08-18 01:00:17 B 19 27 12.89 +34 12 35.2 Z X33
2025-08-18 01:02:49 B 19 27 12.63 +34 12 20.7 Z X33
2025-08-18 01:05:07 B 19 27 12.43 +34 12 07.2 Z X33
2025-08-18 01:17:49 C 19 27 12.55 +34 10 22.2 V W46
2025-08-18 01:47:37 C 19 27 10.48 +34 07 32.8 V W46
2025-08-18 02:08:46 C 19 27 09.00 +34 05 32.2 V W46
2025-08-18 20:10:47 C 19 26 11.100 +32 22 32.23 Z C23
2025-08-18 20:13:01 C 19 26 10.958 +32 22 20.06 Z C23
2025-08-18 20:50:04 B 19 26 08.508 +32 18 49.10 V L65
2025-08-18 20:54:15 B 19 26 08.258 +32 18 25.42 V L65
2025-08-18 20:58:25 B 19 26 08.009 +32 18 01.76 V L65
2025-08-18 21:04:37 B 19 26 07.591 +32 17 26.45 W M07
2025-08-18 21:51:22 B 19 26 04.716 +32 13 01.02 W M07
2025-08-18 21:58:50 C 19 26 04.488 +32 12 21.20 Z C23
2025-08-18 22:00:28 C 19 26 04.368 +32 12 11.52 Z C23
2025-08-18 22:10:28 C 19 26 02.99 +32 11 14.4 V M32
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)