65803 Didymos (1996 GT)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3832284188 ± 6.51e-10
Semi-major axis (a)1.6425644037 AU ± 4.60e-11
Inclination (i)3.41407431° ± 1.19e-07
Long. of Asc. Node (Ω)72.98445790° ± 2.27e-06
Arg. of Perihelion (ω)319.58991656° ± 2.29e-06
Mean Anomaly (M)167.22107700° ± 1.96e-07
Mean Motion (n)0.4681970422°/day ± 1.97e-11
Perihelion dist (q)1.01308704 AU ± 1.07e-09
Aphelion dist (Q)2.27204176 AU ± 1.07e-09
Orbital Period2.10515273 yr ± 8.85e-11
Physical Parameters
H (abs. magnitude)18.11
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.192″
Uncertainty0
Orbit TypeApollo
MOID0.038973 AU
Observations Used5293
Radar Obs Used9
Oppositions14
Arc Total1996-2025
First Observation Used1996-04-11
Last Observation Used2025-02-27
Observations (6092)
Date Type RA Dec Mag Band Observatory
2003-12-04 04:22:22 C 04 32 44.38 +20 36 18.0 k H79
2003-12-04 04:28:11 C 04 32 45.07 +20 36 30.0 k H79
2003-12-04 04:31:34 C 04 32 45.47 +20 36 37.4 k H79
2003-12-04 04:33:47 C 04 32 45.73 +20 36 42.3 k H79
2003-12-04 04:37:17 C 04 32 46.14 +20 36 50.0 k H79
2003-12-04 04:38:43 C 04 32 46.30 +20 36 52.7 k H79
2003-12-04 04:39:49 C 04 32 46.43 +20 36 55.1 k H79
2003-12-04 04:41:05 C 04 32 46.57 +20 36 57.9 k H79
2003-12-04 04:42:19 C 04 32 46.75 +20 37 00.6 k H79
2003-12-04 04:43:18 C 04 32 46.86 +20 37 02.7 k H79
2003-12-04 04:44:23 C 04 32 46.98 +20 37 04.8 k H79
2003-12-04 04:48:13 C 04 32 47.43 +20 37 13.2 k H79
2003-12-04 04:49:36 C 04 32 47.63 +20 37 16.2 k H79
2003-12-04 04:51:10 C 04 32 47.81 +20 37 19.7 k H79
2003-12-04 04:58:02 C 04 32 48.61 +20 37 34.0 k H79
2003-12-04 04:59:18 C 04 32 48.75 +20 37 36.6 k H79
2003-12-04 05:01:15 C 04 32 49.00 +20 37 40.9 k H79
2003-12-04 05:02:12 C 04 32 49.11 +20 37 43.0 k H79
2003-12-04 05:03:45 C 04 32 49.30 +20 37 46.1 k H79
2003-12-04 05:05:32 C 04 32 49.49 +20 37 49.5 k H79
2003-12-04 05:06:32 C 04 32 49.60 +20 37 51.7 k H79
2003-12-04 05:07:52 C 04 32 49.75 +20 37 54.6 k H79
2003-12-04 05:09:12 C 04 32 49.93 +20 37 57.7 k H79
2003-12-04 05:14:26 C 04 32 50.53 +20 38 08.6 k H79
2003-12-04 05:15:42 C 04 32 50.70 +20 38 11.1 k H79
2003-12-04 05:17:24 C 04 32 50.89 +20 38 14.8 k H79
2003-12-04 05:19:56 C 04 32 51.20 +20 38 20.4 k H79
2003-12-04 05:21:07 C 04 32 51.36 +20 38 22.8 k H79
2003-12-04 05:22:44 C 04 32 51.55 +20 38 26.2 k H79
2003-12-04 12:41:55 C 04 33 55.39 +20 53 58.2 m 379
2003-12-04 12:45:13 C 04 33 55.75 +20 54 05.2 m 379
2003-12-04 12:48:31 C 04 33 56.15 +20 54 12.4 m 379
2003-12-04 12:50:11 C 04 33 56.34 +20 54 15.8 m 379
2003-12-04 16:10:16 C 04 34 19.51 +21 01 09.8 300
2003-12-04 16:28:55 C 04 34 21.65 +21 01 46.0 300
2003-12-04 16:38:15 C 04 34 22.70 +21 02 05.5 300
2003-12-04 16:47:35 C 04 34 23.79 +21 02 23.4 300
2003-12-05 18:39:43 C 04 37 54.05 +21 52 27.1 c J94
2003-12-05 18:47:45 C 04 37 55.07 +21 52 42.4 c J94
2003-12-05 18:53:09 C 04 37 55.74 +21 52 52.9 c J94
2003-12-05 19:14:36 C 04 37 56.68 +21 53 31.0 c 174
2003-12-05 19:38:40 C 04 37 59.49 +21 54 17.0 c 174
2003-12-05 20:00:02 C 04 38 03.64 +21 55 15.5 c 434
2003-12-05 20:02:41 C 04 38 02.25 +21 55 02.7 c 174
2003-12-05 20:03:50 C 04 38 04.07 +21 55 22.3 c 434
2003-12-05 20:04:55 C 04 38 04.19 +21 55 24.6 c 434
2003-12-05 20:06:49 C 04 38 04.41 +21 55 28.4 c 434
2003-12-05 20:16:35 C 04 38 05.49 +21 55 46.3 c 130
2003-12-05 20:18:43 C 04 38 05.74 +21 55 50.5 c 130
2003-12-05 20:20:11 C 04 38 05.89 +21 55 53.3 c 130
Radar Observations (9)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2003-11-14 09:00:00 48158516.71 0.2 us 8560 -14 -14
2003-11-15 05:30:00 48558999.72 0.2 us 8560 -14 -14
2003-11-23 03:26:00 60567637.54 0.1 us 2380 -1 -1
2003-11-24 03:17:00 62957533.66 0.1 us 2380 -1 -1
2003-11-26 04:19:00 68342975.29 0.1 us 2380 -1 -1
2022-09-28 11:00:00 73916934.998 1.5 us 8560 -14 -14
2022-09-30 11:20:00 72316200.402 1.5 us 8560 -14 -14
2022-10-07 11:20:00 71795431.959 1 us 8560 -14 -14
2022-10-08 12:50:00 72372078.703 1 us 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)