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
2019-09-18 07:31:58 C 00 06 18.21 -08 24 50.2 V H21
2019-09-18 09:45:01 C 00 05 51.21 -08 34 06.1 V 703
2019-09-18 09:53:38 C 00 05 49.41 -08 34 42.2 V 703
2019-09-18 10:02:15 C 00 05 47.60 -08 35 18.6 V 703
2019-09-18 10:10:52 C 00 05 45.80 -08 35 54.8 V 703
2019-09-18 17:23:31 C 00 04 23.10 -09 06 13.7 q C97
2019-09-18 17:25:41 C 00 04 22.45 -09 06 24.3 q C97
2019-09-18 17:27:53 C 00 04 22.17 -09 06 32.8 q C97
2019-09-18 17:30:04 C 00 04 21.70 -09 06 42.4 q C97
2019-09-19 07:37:01 C 00 01 27.55 -10 06 37.5 u H21
2019-09-19 07:39:05 C 00 01 27.10 -10 06 46.4 u H21
2019-09-19 07:41:09 C 00 01 26.67 -10 06 54.9 u H21
2019-09-19 07:43:13 C 00 01 26.23 -10 07 03.6 u H21
2019-09-19 07:45:17 C 00 01 25.79 -10 07 12.5 u H21
2019-09-19 07:47:21 C 00 01 25.35 -10 07 21.1 u H21
2019-09-19 07:49:25 C 00 01 24.90 -10 07 30.1 u H21
2019-09-19 07:51:29 C 00 01 24.47 -10 07 38.6 u H21
2019-09-19 07:53:33 C 00 01 24.03 -10 07 47.3 u H21
2019-09-19 07:55:37 C 00 01 23.58 -10 07 56.1 u H21
2019-09-19 07:57:42 C 00 01 23.13 -10 08 04.9 u H21
2019-09-19 07:59:46 C 00 01 22.70 -10 08 13.5 u H21
2019-09-19 08:01:50 C 00 01 22.24 -10 08 22.5 u H21
2019-09-19 08:03:54 C 00 01 21.81 -10 08 31.1 u H21
2019-09-19 08:05:58 C 00 01 21.37 -10 08 39.8 u H21
2019-09-19 08:08:52 C 00 01 20.75 -10 08 52.2 u H21
2019-09-20 06:42:24 C 23 56 44.52 -11 44 27.5 V 703
2019-09-20 06:50:11 C 23 56 42.82 -11 45 00.6 V 703
2019-09-20 06:57:59 C 23 56 41.10 -11 45 33.7 V 703
2019-09-20 07:05:46 C 23 56 39.40 -11 46 06.8 V 703
2019-09-20 21:20:13 C 23 53 42.01 -12 46 34.0 q K40
2019-09-20 21:33:23 C 23 53 39.12 -12 47 29.5 q K40
2019-09-24 00:32:16 C 23 37 34.58 -17 59 08.8 q 834
2019-09-24 01:04:16 C 23 37 27.26 -18 01 20.6 q 834
2019-09-27 10:57:38 C 23 19 22.04 -23 21 56.1 V T05
2019-09-27 11:02:16 C 23 19 20.96 -23 22 13.1 V T05
2019-09-27 11:09:40 C 23 19 19.23 -23 22 40.3 V T05
2019-09-27 11:25:38 C 23 19 15.51 -23 23 38.9 V T05
2019-09-28 11:45:33 C 23 13 54.81 -24 51 30.8 q E89
2019-09-28 11:49:41 C 23 13 53.87 -24 51 45.3 q E89
2019-09-28 11:53:50 C 23 13 52.91 -24 52 00.2 q E89
2019-09-28 11:57:59 C 23 13 51.93 -24 52 14.9 q E89
2019-09-28 12:02:09 C 23 13 50.96 -24 52 29.8 q E89
2019-09-28 12:06:33 C 23 13 49.92 -24 52 45.8 q E89
2019-09-29 10:16:33 C 23 08 58.23 -26 11 03.5 V T08
2019-09-29 10:21:13 C 23 08 57.14 -26 11 19.4 V T08
2019-09-29 10:29:50 C 23 08 55.15 -26 11 48.7 V T08
2019-09-29 10:45:11 C 23 08 51.60 -26 12 41.0 V T08
2019-10-03 09:47:43 C 22 48 35.98 -31 10 14.6 V T08
2019-10-03 09:52:22 C 22 48 34.96 -31 10 27.5 V T08
2019-10-03 10:01:03 C 22 48 33.06 -31 10 51.8 V T08
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)