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
2006-09-13 03:18:29 C 18 27 48.70 -07 33 24.3 16.8 c 704
2006-09-13 03:35:19 C 18 27 50.44 -07 33 55.5 16.9 c 704
2006-09-13 03:52:05 C 18 27 52.15 -07 34 25.9 16.5 c 704
2006-09-13 19:04:09 C 18 29 30.57 -08 02 28.7 r 113
2006-09-13 19:05:00 C 18 29 30.59 -08 02 29.6 r 113
2006-09-13 19:05:50 C 18 29 30.63 -08 02 30.5 r 113
2006-09-13 19:06:41 C 18 29 30.68 -08 02 31.1 r 113
2006-09-13 19:07:33 C 18 29 30.73 -08 02 31.8 r 113
2006-09-14 18:36:39 C 18 32 01.16 -08 44 22.3 r 113
2006-09-14 18:37:35 C 18 32 01.26 -08 44 23.4 r 113
2006-09-14 18:39:28 C 18 32 01.53 -08 44 27.9 r 113
2006-09-15 18:44:03 C 18 34 33.82 -09 25 44.0 16.7 r 084
2006-09-17 18:48:36 C 18 39 34.79 -10 43 29.1 r 113
2006-09-17 18:49:51 C 18 39 34.90 -10 43 31.2 r 113
2006-09-17 18:51:02 C 18 39 35.02 -10 43 33.1 r 113
2006-09-17 18:52:12 C 18 39 35.13 -10 43 35.3 r 113
2006-09-17 18:53:23 C 18 39 35.21 -10 43 36.9 r 113
2006-09-20 18:36:59 C 18 46 56.07 -12 29 01.0 r 113
2006-09-20 18:40:47 C 18 46 56.41 -12 29 06.2 r 113
2006-09-21 09:23:30 C 18 48 25.83 -12 48 50.7 r 423
2006-09-21 09:57:48 C 18 48 29.04 -12 49 38.1 r 423
2006-09-25 02:38:38 C 18 57 22.45 -14 41 50.1 16.8 c 704
2006-09-25 02:56:19 C 18 57 24.15 -14 42 09.9 16.7 c 704
2006-09-25 03:14:00 C 18 57 25.83 -14 42 31.1 17.0 c 704
2006-09-25 03:31:41 C 18 57 27.50 -14 42 51.6 16.9 c 704
2006-09-29 23:30:00 C 19 08 53.94 -16 46 34.1 r 808
2006-09-29 23:39:29 C 19 08 54.91 -16 46 43.2 r 808
2006-09-29 23:50:29 C 19 08 55.91 -16 46 53.7 r 808
2006-09-30 00:00:59 C 19 08 56.91 -16 47 03.9 r 808
2006-09-30 19:06:25 C 19 10 48.91 -17 05 37.6 o 493
2006-09-30 19:25:30 C 19 10 50.66 -17 05 55.9 o 493
2006-09-30 20:04:26 C 19 10 54.46 -17 06 30.6 o 493
2006-10-13 09:36:48 C 19 40 03.10 -20 49 55.8 r E12
2006-10-13 09:49:01 C 19 40 04.26 -20 50 02.6 r E12
2006-10-13 10:01:17 C 19 40 05.37 -20 50 09.6 r E12
2006-10-13 10:13:30 C 19 40 06.52 -20 50 16.1 r E12
2006-10-23 01:36:32 C 20 02 21.11 -22 37 44.9 17.7 c 704
2006-10-23 01:53:31 C 20 02 22.67 -22 37 51.9 18.2 c 704
2006-10-23 02:10:39 C 20 02 24.28 -22 37 58.6 18.3 c 704
2006-10-23 02:27:54 C 20 02 25.96 -22 38 04.1 18.2 c 704
2006-10-23 02:45:20 C 20 02 27.49 -22 38 11.2 18.2 c 704
2006-11-14 01:29:22 C 20 53 30.19 -24 23 24.8 18.0 c 704
2006-11-14 01:46:28 C 20 53 31.75 -24 23 25.1 18.4 c 704
2006-11-14 02:03:31 C 20 53 33.38 -24 23 26.3 18.3 c 704
2006-11-14 02:20:38 C 20 53 35.04 -24 23 27.0 18.0 c 704
2006-11-14 02:37:41 C 20 53 36.66 -24 23 27.1 18.3 c 704
2006-11-17 01:24:15 C 21 00 31.18 -24 26 33.2 18.4 c 704
2006-11-17 01:42:06 C 21 00 32.85 -24 26 34.0 18.5 c 704
2006-11-17 01:59:47 C 21 00 34.56 -24 26 33.8 18.4 c 704
2006-11-17 02:17:28 C 21 00 36.22 -24 26 33.7 19.0 c 704
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)