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
2025-09-15 19:59:34 C 19 28 34.35 -10 05 15.0 X C40
2025-09-15 20:01:34 C 19 28 34.41 -10 05 19.0 X C40
2025-09-15 20:03:35 C 19 28 34.48 -10 05 22.9 X C40
2025-09-15 20:04:09 C 19 28 34.49 -10 05 24.8 X D04
2025-09-15 20:05:36 C 19 28 34.55 -10 05 27.3 X C40
2025-09-16 21:43:45 C 19 29 35.402 -10 56 03.84 V R17
2025-09-16 22:03:19 C 19 29 36.050 -10 56 41.53 V R17
2025-09-16 22:22:53 C 19 29 36.713 -10 57 19.12 V R17
2025-09-16 22:42:31 C 19 29 37.370 -10 57 56.84 V R17
2025-09-17 01:10:19 B 19 29 43.831 -11 02 47.90 W X04
2025-09-17 01:17:22 B 19 29 44.045 -11 03 00.90 W X04
2025-09-17 01:24:24 B 19 29 44.318 -11 03 15.08 W X04
2025-09-17 20:57:02 B 19 30 32.06 -11 40 03.1 V R99
2025-09-17 20:57:29 B 19 30 32.01 -11 40 03.9 V R99
2025-09-17 20:57:55 B 19 30 32.12 -11 40 04.7 V R99
2025-09-18 18:02:50 B 19 31 26.580 -12 18 22.18 V 160
2025-09-18 18:06:23 B 19 31 26.722 -12 18 28.55 V 160
2025-09-18 18:10:01 B 19 31 26.866 -12 18 35.06 V 160
2025-09-18 19:23:40 C 19 31 29.333 -12 20 15.29 V M22
2025-09-18 19:28:55 C 19 31 29.532 -12 20 24.58 V M22
2025-09-18 19:50:51 C 19 31 30.787 -12 21 36.29 Z C23
2025-09-18 19:51:20 C 19 31 30.360 -12 21 04.25 V M22
2025-09-18 20:42:43 C 19 31 32.774 -12 23 08.05 Z C23
2025-09-18 21:30:06 C 19 31 34.608 -12 24 31.64 Z C23
2025-09-18 21:45:23 B 19 31 35.00 -12 24 56.5 V R99
2025-09-18 21:47:23 B 19 31 35.09 -12 25 00.1 V R99
2025-09-18 21:49:26 B 19 31 35.16 -12 25 03.6 V R99
2025-09-19 18:57:05 B 19 32 31.769 -13 01 47.17 V L65
2025-09-19 19:01:16 B 19 32 31.932 -13 01 54.44 V L65
2025-09-19 19:05:27 B 19 32 32.124 -13 02 01.43 V L65
2025-09-19 20:16:48 C 19 32 35.033 -13 04 02.35 Z C23
2025-09-19 20:35:26 C 19 32 35.770 -13 04 34.21 Z C23
2025-09-21 01:14:39 C 19 33 54.151 -13 51 28.55 V W68
2025-09-21 01:19:16 C 19 33 54.338 -13 51 36.07 V W68
2025-09-21 01:28:29 C 19 33 54.703 -13 51 50.90 V W68
2025-09-21 19:22:12 C 19 34 45.605 -14 20 43.58 Z C23
2025-09-21 19:29:27 C 19 34 45.907 -14 20 55.07 Z C23
2025-09-21 20:18:12 C 19 34 48.002 -14 22 10.88 Z C23
2025-09-21 20:25:46 B 19 34 48.756 -14 22 17.11 X J51
2025-09-21 20:39:25 B 19 34 49.318 -14 22 38.06 X J51
2025-09-21 20:47:42 B 19 34 49.630 -14 22 51.10 X J51
2025-09-22 19:51:17 C 19 35 55.930 -14 57 36.04 V M22
2025-09-22 19:55:17 C 19 35 56.098 -14 57 41.87 V M22
2025-09-22 20:02:34 C 19 35 56.422 -14 57 52.81 V M22
2025-09-22 20:22:14 C 19 35 57.281 -14 58 21.83 V M22
2025-09-22 21:37:47 C 19 36 01.378 -15 00 38.84 V R17
2025-09-22 21:57:39 C 19 36 02.230 -15 01 08.33 V R17
2025-09-22 22:17:15 C 19 36 03.074 -15 01 37.34 V R17
2025-09-22 22:36:54 C 19 36 03.929 -15 02 06.40 V R17
2025-09-23 16:11:57 C 19 36 57.26 -15 27 54.4 X C40
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)