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
2003-12-18 18:08:28 C 05 05 51.53 +28 00 48.3 r 557
2003-12-18 18:37:12 C 05 05 53.19 +28 01 09.9 r 557
2003-12-18 19:38:29 C 05 05 56.60 +28 01 55.5 r 557
2003-12-18 19:44:53 C 05 05 56.941 +28 02 00.07 X 557
2003-12-18 20:07:12 C 05 05 58.16 +28 02 16.4 r 557
2003-12-18 20:32:44 C 05 05 59.512 +28 02 34.81 X 557
2003-12-18 20:35:56 C 05 05 59.69 +28 02 37.2 r 557
2003-12-18 21:04:39 C 05 06 01.19 +28 02 57.6 r 557
2003-12-18 21:20:36 C 05 06 02.016 +28 03 08.79 X 557
2003-12-18 21:36:33 C 05 06 02.85 +28 03 20.0 r 557
2003-12-18 22:11:40 C 05 06 04.657 +28 03 44.22 X 557
2003-12-18 22:12:20 C 05 06 05.16 +28 03 43.3 r 145
2003-12-18 22:23:24 C 05 06 05.71 +28 03 50.9 r 145
2003-12-18 22:26:47 C 05 06 05.91 +28 03 53.3 r 145
2003-12-18 22:32:07 C 05 06 06.16 +28 03 56.7 r 145
2003-12-18 22:37:11 C 05 06 05.97 +28 04 01.6 r 557
2003-12-18 22:38:08 C 05 06 06.50 +28 04 01.0 r 145
2003-12-18 23:05:54 C 05 06 07.46 +28 04 20.8 r 557
2003-12-18 23:34:36 C 05 06 08.95 +28 04 39.7 r 557
2003-12-19 00:07:42 C 05 06 10.68 +28 05 01.1 r 557
2003-12-19 00:33:13 C 05 06 12.03 +28 05 17.4 r 557
2003-12-19 01:05:07 C 05 06 13.74 +28 05 37.5 r 557
2003-12-19 02:37:02 C 05 06 18.90 +28 06 34.0 r 557
2003-12-19 02:52:26 C 05 06 24.05 +28 07 13.8 14.1 d H72
2003-12-19 02:56:16 C 05 06 24.27 +28 07 16.4 16.4 d H72
2003-12-19 02:59:46 C 05 06 25.23 +28 07 01.8 P 716
2003-12-19 03:00:06 C 05 06 24.41 +28 07 19.4 16.4 d H72
2003-12-19 03:03:56 C 05 06 24.63 +28 07 22.1 16.4 d H72
2003-12-19 03:08:57 C 05 06 20.77 +28 06 53.3 r 557
2003-12-19 03:45:05 C 05 06 27.59 +28 07 34.8 P 716
2003-12-19 04:17:48 C 05 06 29.28 +28 07 58.2 P 716
2003-12-19 04:48:43 C 05 06 30.83 +28 08 20.3 P 716
2003-12-19 05:19:16 C 05 06 32.31 +28 08 41.6 P 716
2003-12-19 06:04:20 C 05 06 34.49 +28 09 12.1 P 716
2003-12-20 03:06:19 C 05 07 54.35 +28 22 35.9 P 716
2003-12-20 03:45:30 C 05 07 56.29 +28 23 02.2 P 716
2003-12-20 04:43:26 C 05 07 59.14 +28 23 40.6 P 716
2003-12-20 05:36:40 C 05 08 01.64 +28 24 14.9 P 716
2003-12-20 06:33:08 C 05 08 04.25 +28 24 49.7 P 716
2003-12-20 06:35:02 C 05 08 02.95 +28 25 00.4 14.7 d H72
2003-12-20 06:39:11 C 05 08 03.15 +28 25 02.4 14.9 d H72
2003-12-20 06:43:22 C 05 08 03.30 +28 25 04.8 14.9 d H72
2003-12-20 06:47:32 C 05 08 03.47 +28 25 07.1 14.8 d H72
2003-12-20 07:22:55 C 05 08 06.59 +28 25 19.4 P 716
2003-12-20 08:14:45 C 05 08 09.05 +28 25 49.3 P 716
2003-12-22 04:21:41 C 05 10 46.71 +28 50 55.0 m 333
2003-12-22 04:34:10 C 05 10 47.10 +28 51 05.7 m 333
2003-12-22 04:40:26 C 05 10 47.34 +28 51 09.8 m 333
2003-12-22 06:27:35 C 05 10 51.72 +28 52 07.2 15.2 c 704
2003-12-22 06:46:28 C 05 10 52.53 +28 52 16.9 15.3 c 704
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)