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
2019-09-10 12:16:21 C 00 39 21.97 +03 49 20.7 V T08
2019-09-10 21:44:51 C 00 37 56.46 +03 15 36.6 V K85
2019-09-10 21:59:09 C 00 37 54.18 +03 14 46.2 V K85
2019-09-12 06:11:08 C 00 32 45.73 +01 17 50.9 u H21
2019-09-12 06:13:39 C 00 32 45.30 +01 17 41.5 u H21
2019-09-12 06:16:10 C 00 32 44.86 +01 17 32.1 u H21
2019-09-12 06:18:41 C 00 32 44.43 +01 17 22.9 u H21
2019-09-12 06:21:12 C 00 32 43.99 +01 17 13.5 u H21
2019-09-12 06:23:44 C 00 32 43.56 +01 17 04.1 u H21
2019-09-12 06:26:15 C 00 32 43.12 +01 16 54.7 u H21
2019-09-12 06:28:46 C 00 32 42.68 +01 16 45.4 u H21
2019-09-12 06:31:17 C 00 32 42.24 +01 16 36.0 u H21
2019-09-12 06:33:48 C 00 32 41.80 +01 16 26.6 u H21
2019-09-12 06:36:19 C 00 32 41.36 +01 16 17.2 u H21
2019-09-12 06:38:50 C 00 32 40.93 +01 16 07.9 u H21
2019-09-12 06:41:21 C 00 32 40.49 +01 15 58.5 u H21
2019-09-12 06:43:52 C 00 32 40.05 +01 15 49.2 u H21
2019-09-12 06:46:24 C 00 32 39.61 +01 15 39.8 u H21
2019-09-12 06:48:55 C 00 32 39.18 +01 15 30.4 u H21
2019-09-12 06:51:26 C 00 32 38.74 +01 15 21.0 u H21
2019-09-12 06:54:13 C 00 32 38.26 +01 15 10.7 u H21
2019-09-12 10:36:22 C 00 32 02.39 +01 01 35.0 V T05
2019-09-12 10:42:28 C 00 32 01.32 +01 01 12.2 V T05
2019-09-12 10:58:19 C 00 31 58.50 +01 00 12.8 V T05
2019-09-12 11:05:48 C 00 31 57.18 +00 59 44.9 V T05
2019-09-12 21:34:36 C 00 30 13.76 +00 20 03.7 q L34
2019-09-12 21:37:16 C 00 30 13.30 +00 19 53.2 q L34
2019-09-12 21:39:56 C 00 30 12.81 +00 19 43.1 q L34
2019-09-12 21:42:38 C 00 30 12.35 +00 19 33.2 q L34
2019-09-12 21:45:50 C 00 30 11.78 +00 19 20.6 q L34
2019-09-13 01:07:09 C 00 29 36.18 +00 06 31.1 c K87
2019-09-13 01:14:39 C 00 29 34.89 +00 06 03.3 c K87
2019-09-13 01:21:24 C 00 29 33.71 +00 05 37.3 c K87
2019-09-13 22:02:56 C 00 26 02.62 -01 14 08.8 q 160
2019-09-13 22:05:55 C 00 26 02.06 -01 14 20.9 q 160
2019-09-13 22:08:56 C 00 26 01.53 -01 14 33.0 q 160
2019-09-17 23:45:46 C 00 07 51.66 -07 52 15.0 V Z80
2019-09-17 23:46:26 C 00 07 51.53 -07 52 17.8 V Z80
2019-09-17 23:47:15 C 00 07 51.35 -07 52 21.3 V Z80
2019-09-17 23:48:05 C 00 07 51.18 -07 52 24.7 V Z80
2019-09-17 23:48:56 C 00 07 51.01 -07 52 28.3 V Z80
2019-09-17 23:49:46 C 00 07 50.83 -07 52 31.9 V Z80
2019-09-17 23:50:35 C 00 07 50.66 -07 52 35.3 V Z80
2019-09-17 23:51:27 C 00 07 50.49 -07 52 38.9 V Z80
2019-09-18 07:01:20 C 00 06 24.61 -08 22 41.3 V H21
2019-09-18 07:06:43 C 00 06 23.49 -08 23 04.0 V H21
2019-09-18 07:11:41 C 00 06 22.45 -08 23 24.8 V H21
2019-09-18 07:16:51 C 00 06 21.37 -08 23 46.6 V H21
2019-09-18 07:21:50 C 00 06 20.33 -08 24 07.4 V H21
2019-09-18 07:26:47 C 00 06 19.30 -08 24 28.3 V H21
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)