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
2003-12-15 05:49:55 C 04 59 59.91 +26 54 27.9 c H41
2003-12-16 08:48:16 C 05 01 55.89 +27 17 47.9 d 291
2003-12-16 08:54:28 C 05 01 56.21 +27 17 52.2 d 291
2003-12-16 09:00:36 C 05 01 56.62 +27 17 57.3 d 291
2003-12-16 18:41:51 C 05 02 41.92 +27 25 27.8 c 113
2003-12-16 18:44:02 C 05 02 42.05 +27 25 29.5 c 113
2003-12-16 18:46:11 C 05 02 42.19 +27 25 31.6 c 113
2003-12-16 18:48:22 C 05 02 42.33 +27 25 33.6 c 113
2003-12-16 18:50:31 C 05 02 42.46 +27 25 35.5 c 113
2003-12-16 20:00:30 C 05 02 46.680 +27 26 35.87 X 557
2003-12-16 20:06:52 C 05 02 47.057 +27 26 41.35 X 557
2003-12-16 20:13:16 C 05 02 47.42 +27 26 46.7 r 557
2003-12-16 20:22:50 C 05 02 47.994 +27 26 54.84 X 557
2003-12-16 20:26:00 C 05 02 48.17 +27 26 57.5 r 557
2003-12-16 20:32:23 C 05 02 48.541 +27 27 02.65 X 557
2003-12-16 20:38:47 C 05 02 48.92 +27 27 08.3 r 557
2003-12-16 20:51:33 C 05 02 49.65 +27 27 18.8 r 557
2003-12-16 21:15:03 C 05 02 51.37 +27 27 41.6 r 203
2003-12-16 22:21:00 C 05 02 55.06 +27 28 35.4 r 203
2003-12-17 02:10:03 C 05 03 13.55 +27 31 31.0 P 716
2003-12-17 02:44:53 C 05 03 15.62 +27 32 01.0 P 716
2003-12-17 03:15:03 C 05 03 17.31 +27 32 25.5 P 716
2003-12-17 04:09:19 C 05 03 20.51 +27 33 12.4 P 716
2003-12-17 04:47:10 C 05 03 22.60 +27 33 43.2 P 716
2003-12-17 07:09:41 C 05 03 29.43 +27 35 38.1 c H41
2003-12-17 07:12:44 C 05 03 29.59 +27 35 40.2 c H41
2003-12-17 07:14:15 C 05 03 29.67 +27 35 41.4 c H41
2003-12-17 07:16:07 C 05 03 29.77 +27 35 42.7 c H41
2003-12-17 07:18:09 C 05 03 29.88 +27 35 44.2 c H41
2003-12-17 20:19:07 C 05 04 25.91 +27 45 14.4 c J93
2003-12-17 20:21:29 C 05 04 26.02 +27 45 16.7 c J93
2003-12-17 20:22:35 C 05 04 26.15 +27 45 17.2 c J93
2003-12-17 20:23:36 C 05 04 26.16 +27 45 18.0 c J93
2003-12-17 20:24:40 C 05 04 26.25 +27 45 19.4 c J93
2003-12-17 21:59:50 C 05 04 31.54 +27 46 33.9 c J94
2003-12-17 22:03:10 C 05 04 31.77 +27 46 35.7 c J94
2003-12-17 22:11:03 C 05 04 32.22 +27 46 41.5 c J94
2003-12-18 02:59:53 C 05 04 52.89 +27 50 18.4 P 716
2003-12-18 03:36:04 C 05 04 54.86 +27 50 46.5 P 716
2003-12-18 04:08:38 C 05 04 56.62 +27 51 11.8 P 716
2003-12-18 04:33:30 C 05 04 57.98 +27 51 31.1 P 716
2003-12-18 05:04:30 C 05 04 59.55 +27 51 54.1 P 716
2003-12-18 05:32:28 C 05 05 00.97 +27 52 15.0 P 716
2003-12-18 06:39:10 C 05 05 04.48 +27 53 09.3 15.2 c 704
2003-12-18 07:02:02 C 05 05 05.61 +27 53 25.1 15.5 c 704
2003-12-18 07:20:43 C 05 05 06.53 +27 53 38.0 15.3 c 704
2003-12-18 07:39:16 C 05 05 07.47 +27 53 51.3 15.1 c 704
2003-12-18 07:57:45 C 05 05 08.41 +27 54 04.0 15.3 c 704
2003-12-18 17:04:39 C 05 05 47.70 +27 59 59.7 r 557
2003-12-18 17:36:34 C 05 05 49.64 +28 00 24.1 r 557
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)