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
2006-08-15 14:36:30 C 16 45 54.47 +29 21 27.8 m 300
2006-08-15 14:39:10 C 16 45 55.04 +29 21 15.2 m 300
2006-08-15 14:42:57 C 16 45 56.01 +29 20 58.7 m 300
2006-08-15 14:44:29 C 16 45 56.37 +29 20 51.4 m 300
2006-08-17 04:46:18 C 16 54 32.28 +26 26 15.1 j G63
2006-08-17 05:44:34 C 16 54 44.52 +26 21 49.2 j G63
2006-08-17 05:55:50 C 16 54 46.83 +26 20 57.5 j G63
2006-08-17 21:14:33 C 16 58 02.90 +25 11 44.8 r A97
2006-08-17 21:30:04 C 16 58 06.10 +25 10 35.2 r A97
2006-08-17 22:20:47 C 16 58 16.45 +25 06 44.9 r A97
2006-08-19 05:46:45 C 17 04 41.76 +22 47 23.4 j G63
2006-08-19 05:50:01 C 17 04 42.40 +22 47 09.2 j G63
2006-08-19 05:54:19 C 17 04 43.20 +22 46 50.4 j G63
2006-08-19 06:33:41 C 17 04 50.79 +22 43 56.0 j G63
2006-08-19 06:36:34 C 17 04 51.33 +22 43 43.7 j G63
2006-08-19 06:42:02 C 17 04 52.37 +22 43 20.2 j G63
2006-08-19 06:47:47 C 17 04 53.49 +22 42 54.5 j G63
2006-08-19 19:50:43 C 17 07 27.59 +21 46 08.3 o 198
2006-08-19 19:53:17 C 17 07 28.07 +21 45 57.2 o 198
2006-08-19 19:55:06 C 17 07 28.41 +21 45 49.3 o 198
2006-08-19 19:55:55 C 17 07 28.56 +21 45 45.7 o 198
2006-08-19 19:57:38 C 17 07 28.88 +21 45 38.2 o 198
2006-08-25 05:46:14 C 17 30 06.97 +13 00 46.9 r H45
2006-08-25 05:49:13 C 17 30 07.42 +13 00 35.6 r H45
2006-08-25 05:51:15 C 17 30 07.75 +13 00 28.0 r H45
2006-08-25 05:52:51 C 17 30 07.99 +13 00 22.0 r H45
2006-08-25 05:53:38 C 17 30 08.11 +13 00 19.1 r H45
2006-08-27 03:54:04 C 17 37 13.79 +10 13 22.8 r G63
2006-08-27 03:57:04 C 17 37 14.21 +10 13 12.1 r G63
2006-08-27 04:05:28 C 17 37 15.39 +10 12 41.9 r G63
2006-08-27 04:07:33 C 17 37 15.70 +10 12 35.0 r G63
2006-08-27 04:20:34 C 17 37 17.55 +10 11 50.1 r G63
2006-08-27 04:32:53 C 17 37 19.27 +10 11 05.0 r G63
2006-08-27 04:45:41 C 17 37 21.12 +10 10 21.6 r G63
2006-08-28 21:09:10 C 17 43 13.60 +07 52 28.3 i 169
2006-08-28 21:13:20 C 17 43 14.06 +07 52 15.7 i 169
2006-08-28 21:17:22 C 17 43 14.40 +07 52 06.1 i 169
2006-09-01 20:58:31 C 17 56 11.31 +02 56 31.8 16.4 r 084
2006-09-02 19:18:48 C 17 59 02.91 +01 53 35.1 15.7 r 084
2006-09-02 19:20:57 C 17 59 03.18 +01 53 29.0 15.7 r 084
2006-09-03 19:08:57 C 18 02 02.13 +00 48 48.5 16.0 r 084
2006-09-03 19:11:06 C 18 02 02.41 +00 48 42.7 16.1 r 084
2006-09-08 20:22:25 C 18 16 24.91 -04 05 05.4 c 046
2006-09-08 20:24:24 C 18 16 25.12 -04 05 09.8 c 046
2006-09-08 20:25:24 C 18 16 25.25 -04 05 11.8 c 046
2006-09-08 20:27:25 C 18 16 25.46 -04 05 16.5 c 046
2006-09-10 18:42:50 C 18 21 37.52 -05 43 13.4 16.2 r 084
2006-09-10 18:44:59 C 18 21 37.74 -05 43 17.7 16.7 r 084
2006-09-11 19:18:01 C 18 24 19.94 -06 32 22.0 16.7 r 084
2006-09-13 03:01:48 C 18 27 46.99 -07 32 53.3 16.6 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)