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
2003-10-27 01:50:39 C 20 36 49.22 -26 53 46.7 17.3 c 704
2003-10-27 02:07:13 C 20 36 50.34 -26 53 53.2 17.5 c 704
2003-10-27 02:23:55 C 20 36 51.37 -26 53 58.5 17.5 c 704
2003-10-27 02:40:50 C 20 36 52.46 -26 54 03.9 17.6 c 704
2003-10-27 02:57:19 C 20 36 53.50 -26 54 09.9 17.5 c 704
2003-10-29 10:35:54 C 20 40 43.80 -27 12 46.2 r 428
2003-10-29 10:40:18 C 20 40 44.08 -27 12 47.5 r 428
2003-10-29 10:44:43 C 20 40 44.39 -27 12 48.7 r 428
2003-10-29 10:49:09 C 20 40 44.66 -27 12 49.9 r 428
2003-12-16 10:32:29 C 22 07 17.08 -28 50 40.9 r E14
2003-12-16 10:57:59 C 22 07 18.79 -28 50 39.6 r E14
2003-12-16 11:23:17 C 22 07 20.45 -28 50 38.6 r E14
2004-06-24 18:48:24 C 02 00 19.08 +13 54 41.7 r E12
2004-06-24 19:04:41 C 02 00 20.99 +13 54 45.8 r E12
2004-06-24 19:21:06 C 02 00 22.98 +13 54 50.2 r E12
2004-06-24 19:37:30 C 02 00 24.90 +13 54 55.5 r E12
2006-08-02 21:43:48 C 15 02 49.80 +51 53 43.5 o A32
2006-08-02 21:52:07 C 15 02 53.70 +51 53 12.7 o A32
2006-08-02 22:03:23 C 15 02 58.99 +51 52 30.6 o A32
2006-08-02 22:16:07 C 15 03 04.96 +51 51 43.1 o A32
2006-08-02 22:28:52 C 15 03 10.96 +51 50 55.2 o A32
2006-08-05 21:23:23 C 15 34 08.11 +47 10 37.2 o A32
2006-08-05 21:28:22 C 15 34 10.09 +47 10 15.9 o A32
2006-08-05 21:39:35 C 15 34 14.51 +47 09 28.0 o A32
2006-08-05 21:55:35 C 15 34 20.83 +47 08 19.4 o A32
2006-08-05 22:03:29 C 15 34 23.96 +47 07 45.6 o A32
2006-08-11 02:16:43 C 16 17 21.29 +37 49 22.7 H68
2006-08-11 02:28:08 C 16 17 24.56 +37 48 29.5 H68
2006-08-11 02:41:13 C 16 17 28.35 +37 47 28.4 H68
2006-08-12 01:23:51 C 16 24 02.78 +36 00 50.0 r H98
2006-08-12 01:32:49 C 16 24 05.23 +36 00 07.9 r H98
2006-08-12 01:39:38 C 16 24 07.10 +35 59 34.9 r H98
2006-08-14 00:35:52 C 16 36 38.63 +32 18 36.8 r 204
2006-08-14 00:36:45 C 16 36 38.88 +32 18 32.4 r 204
2006-08-14 00:37:48 C 16 36 39.14 +32 18 27.5 r 204
2006-08-14 02:59:01 C 16 37 15.75 +32 07 48.4 H68
2006-08-14 03:24:15 C 16 37 21.80 +32 05 46.6 H68
2006-08-14 03:37:49 C 16 37 25.15 +32 04 42.8 H68
2006-08-14 03:55:34 C 16 37 29.45 +32 03 18.3 H68
2006-08-15 12:23:11 C 16 45 24.17 +29 31 54.4 m 300
2006-08-15 12:28:30 C 16 45 25.42 +29 31 28.2 m 300
2006-08-15 12:29:50 C 16 45 25.65 +29 31 23.2 m 300
2006-08-15 12:33:48 C 16 45 26.55 +29 31 03.5 m 300
2006-08-15 12:35:10 C 16 45 26.91 +29 30 58.8 m 300
2006-08-15 12:39:10 C 16 45 27.78 +29 30 39.2 m 300
2006-08-15 12:44:30 C 16 45 29.06 +29 30 14.9 m 300
2006-08-15 14:20:30 C 16 45 50.87 +29 22 43.5 m 300
2006-08-15 14:23:10 C 16 45 51.39 +29 22 31.6 m 300
2006-08-15 14:28:29 C 16 45 52.69 +29 22 05.8 m 300
2006-08-15 14:30:02 C 16 45 52.98 +29 21 58.9 m 300
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)