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
2025-11-11 01:29:07 C 20 59 08.222 -27 01 09.88 V W68
2025-11-11 02:06:01 C 20 59 11.196 -27 01 14.12 V W68
2025-11-11 02:13:32 C 20 59 11.832 -27 01 14.88 V W68
2025-11-12 05:36:25 C 21 01 29.186 -27 04 43.03 V T08
2025-11-12 05:41:42 C 21 01 29.575 -27 04 44.00 V T08
2025-11-12 05:49:36 C 21 01 30.221 -27 04 44.51 V T08
2025-11-15 06:52:20 C 21 07 37.711 -27 11 52.33 V T05
2025-11-15 06:59:01 C 21 07 38.268 -27 11 52.51 V T05
2025-11-15 07:06:21 C 21 07 38.882 -27 11 52.62 V T05
2025-11-15 07:20:53 C 21 07 40.049 -27 11 53.34 V T05
2025-11-15 18:53:47 C 21 08 38.582 -27 12 39.82 V M22
2025-11-15 19:01:41 C 21 08 39.252 -27 12 40.00 V M22
2025-11-15 19:06:14 C 21 08 39.619 -27 12 40.39 V M22
2025-11-15 19:23:21 C 21 08 41.040 -27 12 41.58 V M22
2025-11-17 00:47:43 C 21 11 10.102 -27 14 49.88 V W68
2025-11-17 00:52:25 C 21 11 10.466 -27 14 49.85 V W68
2025-11-17 00:59:49 C 21 11 11.107 -27 14 49.34 V W68
2025-11-17 01:15:14 C 21 11 12.355 -27 14 50.46 V W68
2025-11-18 19:03:27 C 21 14 44.858 -27 17 15.58 V M22
2025-11-18 19:08:02 C 21 14 45.238 -27 17 15.97 V M22
2025-11-18 19:16:36 C 21 14 45.936 -27 17 15.94 V M22
2025-11-18 19:31:13 C 21 14 47.138 -27 17 16.40 V M22
2025-11-21 18:25:20 C 21 20 49.090 -27 19 57.58 V M22
2025-11-21 18:29:53 C 21 20 49.483 -27 19 57.72 V M22
2025-11-21 18:40:59 C 21 20 50.359 -27 19 57.61 V M22
2025-11-21 19:07:17 C 21 20 52.567 -27 19 57.86 V M22
2025-11-23 00:23:13 C 21 23 22.344 -27 20 34.44 V W68
2025-11-23 00:27:47 C 21 23 22.802 -27 20 35.23 V W68
2025-11-23 00:51:33 C 21 23 24.749 -27 20 34.80 V W68
2025-11-23 00:57:53 C 21 23 25.291 -27 20 35.05 V W68
2025-11-26 05:03:14 C 21 29 55.404 -27 21 04.36 V T05
2025-11-26 05:11:11 C 21 29 55.990 -27 21 04.14 V T05
2025-11-26 05:15:47 C 21 29 56.407 -27 21 04.46 V T05
2025-11-26 05:30:16 C 21 29 57.547 -27 21 03.17 V T05
2025-11-27 05:23:49 C 21 32 00.060 -27 20 48.77 V T05
2025-11-27 05:28:29 C 21 32 00.418 -27 20 48.98 V T05
2025-11-27 05:36:22 C 21 32 01.070 -27 20 48.41 V T05
2025-11-27 05:50:57 C 21 32 02.249 -27 20 48.19 V T05
2025-11-29 00:49:37 C 21 35 42.305 -27 19 48.18 V W68
2025-11-29 01:04:30 C 21 35 43.560 -27 19 47.82 V W68
2025-11-29 01:14:08 C 21 35 44.323 -27 19 47.17 V W68
2025-11-29 01:18:12 C 21 35 44.630 -27 19 47.28 V W68
2025-11-30 18:41:50 C 21 39 16.368 -27 18 33.26 V M22
2025-11-30 18:46:27 C 21 39 16.750 -27 18 33.05 V M22
2025-11-30 18:54:19 C 21 39 17.390 -27 18 32.65 V M22
2025-11-30 19:12:10 C 21 39 18.881 -27 18 31.79 V M22
2025-12-02 05:41:50 C 21 42 14.952 -27 17 22.67 V T05
2025-12-02 05:51:49 C 21 42 15.749 -27 17 22.42 V T05
2025-12-02 05:57:43 C 21 42 16.267 -27 17 21.77 V T05
2025-12-02 06:12:55 C 21 42 17.474 -27 17 20.51 V T05
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)