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
2025-09-23 16:13:53 C 19 36 57.33 -15 27 57.2 X C40
2025-09-23 16:15:48 C 19 36 57.43 -15 28 00.0 X C40
2025-09-23 16:17:44 C 19 36 57.52 -15 28 02.8 X C40
2025-09-23 16:19:32 C 19 36 57.59 -15 28 05.6 X C40
2025-09-23 16:21:16 C 19 36 57.67 -15 28 08.0 X C40
2025-09-23 16:22:59 C 19 36 57.75 -15 28 10.3 X C40
2025-09-23 16:24:42 C 19 36 57.82 -15 28 12.8 X C40
2025-09-23 16:26:24 C 19 36 57.90 -15 28 15.1 X C40
2025-09-23 16:28:07 C 19 36 57.98 -15 28 17.8 X C40
2025-09-23 16:29:51 C 19 36 58.06 -15 28 20.2 X C40
2025-09-23 16:31:35 C 19 36 58.14 -15 28 22.7 X C40
2025-09-24 01:14:14 C 19 37 23.976 -15 40 21.94 V W68
2025-09-24 01:18:11 C 19 37 24.151 -15 40 27.55 V W68
2025-09-24 01:49:04 C 19 37 25.548 -15 41 10.90 V W68
2025-09-24 02:18:39 C 19 37 26.885 -15 41 52.55 V W68
2025-09-24 16:23:44 C 19 38 10.94 -16 02 00.3 X C40
2025-09-24 16:25:40 C 19 38 11.02 -16 02 02.4 X C40
2025-09-24 16:27:36 C 19 38 11.10 -16 02 05.2 X C40
2025-09-24 16:36:29 C 19 38 11.52 -16 02 17.2 X C40
2025-09-24 16:38:12 C 19 38 11.60 -16 02 19.8 X C40
2025-09-24 16:39:55 C 19 38 11.68 -16 02 21.9 X C40
2025-09-24 16:41:38 C 19 38 11.78 -16 02 24.3 X C40
2025-09-24 16:43:20 C 19 38 11.84 -16 02 26.6 X C40
2025-09-25 18:49:24 C 19 39 33.228 -16 37 08.51 V M22
2025-09-25 18:53:20 C 19 39 33.415 -16 37 13.66 V M22
2025-09-25 19:02:28 C 19 39 33.845 -16 37 25.46 V M22
2025-09-25 19:16:31 C 19 39 34.517 -16 37 44.00 V M22
2025-09-28 18:20:47 C 19 43 27.991 -18 05 30.19 V M22
2025-09-28 18:25:22 C 19 43 28.236 -18 05 35.41 V M22
2025-09-28 18:36:43 C 19 43 28.810 -18 05 48.48 V M22
2025-09-28 19:02:47 C 19 43 30.134 -18 06 18.61 V M22
2025-10-04 06:12:44 C 19 51 17.398 -20 22 08.72 V T05
2025-10-04 06:34:32 C 19 51 18.653 -20 22 28.78 V T05
2025-10-04 06:39:07 C 19 51 18.888 -20 22 32.77 V T05
2025-10-04 06:48:58 C 19 51 19.459 -20 22 41.84 V T05
2025-10-04 19:27:15 C 19 52 06.636 -20 33 52.63 V M22
2025-10-04 19:31:09 C 19 52 06.881 -20 33 56.48 V M22
2025-10-04 19:39:03 C 19 52 07.315 -20 34 03.25 V M22
2025-10-04 20:12:48 C 19 52 09.238 -20 34 33.06 V M22
2025-10-06 02:39:21 C 19 54 04.618 -21 01 08.62 V W68
2025-10-06 02:56:10 C 19 54 05.623 -21 01 22.30 V W68
2025-10-06 03:15:31 C 19 54 06.780 -21 01 38.68 V W68
2025-10-06 03:20:24 C 19 54 07.097 -21 01 42.64 V W68
2025-10-07 06:56:19 C 19 55 53.942 -21 24 52.70 V T08
2025-10-07 07:00:16 C 19 55 54.161 -21 24 55.80 V T08
2025-10-07 07:09:31 C 19 55 54.698 -21 25 03.00 V T08
2025-10-08 02:36:30 C 19 57 11.153 -21 40 34.54 V G96
2025-10-08 02:52:54 C 19 57 12.143 -21 40 47.17 V G96
2025-10-08 03:07:17 C 19 57 13.032 -21 40 58.40 V G96
2025-10-08 03:15:28 C 19 57 13.522 -21 41 04.74 V G96
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)