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
2025-08-31 19:42:22 C 19 20 07.622 +07 07 21.97 V M22
2025-08-31 19:44:29 C 19 20 07.98 +07 06 24.8 X K83
2025-08-31 19:46:16 C 19 20 07.601 +07 07 06.85 V M22
2025-08-31 19:51:01 C 19 20 07.96 +07 06 00.0 X K83
2025-08-31 20:03:25 C 19 20 07.529 +07 06 00.25 V M22
2025-09-01 18:17:52 C 19 20 16.88 +05 40 29.7 X C40
2025-09-01 18:20:17 C 19 20 16.88 +05 40 20.6 X C40
2025-09-01 18:22:41 C 19 20 16.88 +05 40 11.6 X C40
2025-09-01 18:25:05 C 19 20 16.88 +05 40 02.7 X C40
2025-09-01 18:27:30 C 19 20 16.88 +05 39 53.7 X C40
2025-09-01 18:29:54 C 19 20 16.88 +05 39 44.7 X C40
2025-09-01 18:32:18 C 19 20 16.88 +05 39 35.7 X C40
2025-09-01 18:34:44 C 19 20 16.87 +05 39 26.7 X C40
2025-09-01 18:37:03 C 19 20 16.88 +05 39 18.0 X C40
2025-09-01 18:39:15 C 19 20 16.88 +05 39 09.9 X C40
2025-09-01 18:41:28 C 19 20 16.88 +05 39 01.5 X C40
2025-09-01 18:43:39 C 19 20 16.88 +05 38 53.3 X C40
2025-09-01 19:48:57 C 19 20 16.93 +05 34 49.2 X D04
2025-09-01 19:54:25 C 19 20 16.92 +05 34 29.1 X D04
2025-09-01 19:59:52 C 19 20 16.94 +05 34 08.5 X D04
2025-09-01 20:10:46 C 19 20 16.95 +05 33 27.8 X D04
2025-09-01 20:21:42 C 19 20 16.97 +05 32 47.2 X D04
2025-09-02 18:47:05 C 19 20 31.54 +04 10 55.5 V G17
2025-09-02 18:49:22 C 19 20 31.54 +04 10 47.2 V G17
2025-09-02 18:51:39 C 19 20 31.56 +04 10 39.1 V G17
2025-09-02 21:39:38 B 19 20 32.957 +04 00 47.48 X J51
2025-09-02 21:50:49 B 19 20 32.974 +04 00 07.49 X J51
2025-09-02 22:02:01 B 19 20 32.998 +03 59 27.74 X J51
2025-09-03 01:52:39 B 19 20 35.047 +03 46 09.26 Z X33
2025-09-03 01:55:12 B 19 20 35.030 +03 46 00.08 Z X33
2025-09-03 01:57:44 B 19 20 35.052 +03 45 51.30 Z X33
2025-09-03 02:03:33 C 19 20 35.578 +03 45 47.12 V W68
2025-09-03 02:16:55 C 19 20 35.606 +03 44 59.78 V W68
2025-09-03 02:27:36 C 19 20 35.645 +03 44 21.98 V W68
2025-09-03 02:47:24 C 19 20 35.700 +03 43 12.04 V W68
2025-09-03 20:07:28 B 19 20 50.700 +02 42 18.43 Z J51
2025-09-03 20:15:58 B 19 20 50.724 +02 41 49.34 Z J51
2025-09-03 20:24:12 B 19 20 50.755 +02 41 21.16 Z J51
2025-09-03 21:15:23 B 19 20 50.174 +02 38 14.91 W G34
2025-09-03 21:17:00 B 19 20 50.176 +02 38 09.13 W G34
2025-09-04 17:51:39 C 19 21 09.33 +01 29 09.3 X C40
2025-09-04 17:54:04 C 19 21 09.36 +01 29 01.3 X C40
2025-09-04 17:56:28 C 19 21 09.38 +01 28 53.4 X C40
2025-09-04 17:58:51 C 19 21 09.40 +01 28 45.5 X C40
2025-09-04 18:01:16 C 19 21 09.42 +01 28 37.6 X C40
2025-09-04 18:03:40 C 19 21 09.45 +01 28 29.6 X C40
2025-09-04 18:06:03 C 19 21 09.47 +01 28 21.8 X C40
2025-09-04 18:08:28 C 19 21 09.49 +01 28 13.8 X C40
2025-09-04 18:10:46 C 19 21 09.51 +01 28 06.3 X C40
2025-09-04 18:12:59 C 19 21 09.53 +01 27 59.0 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)