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
2003-11-11 20:57:10 C 01 43 15.67 -25 08 54.8 r 620
2003-11-11 20:58:06 C 01 43 16.15 -25 08 48.4 r 620
2003-11-11 21:47:07 C 01 43 40.99 -25 03 09.0 r 620
2003-11-11 21:48:03 C 01 43 41.47 -25 03 02.5 r 620
2003-11-11 21:48:59 C 01 43 41.96 -25 02 56.0 r 620
2003-11-11 21:49:54 C 01 43 42.41 -25 02 49.3 r 620
2003-11-11 21:50:50 C 01 43 42.87 -25 02 43.0 r 620
2003-11-11 21:51:46 C 01 43 43.35 -25 02 36.5 r 620
2003-11-11 21:52:47 C 01 43 43.85 -25 02 29.4 r 620
2003-11-11 21:53:42 C 01 43 44.32 -25 02 23.0 r 620
2003-11-11 21:54:38 C 01 43 44.79 -25 02 16.3 r 620
2003-11-12 11:15:02 C 01 51 06.27 -23 24 32.3 13.1 r D85
2003-11-12 11:19:59 C 01 51 08.73 -23 23 57.4 13.1 r D85
2003-11-12 11:32:23 C 01 51 14.89 -23 22 30.1 13.2 r D85
2003-11-15 00:35:38 C 02 22 28.54 -15 56 08.1 r 620
2003-11-15 00:36:48 C 02 22 29.05 -15 55 59.5 r 620
2003-11-15 00:37:43 C 02 22 29.46 -15 55 52.4 r 620
2003-11-15 00:38:38 C 02 22 29.89 -15 55 45.4 r 620
2003-11-15 00:40:31 C 02 22 30.75 -15 55 31.1 r 620
2003-11-15 00:41:25 C 02 22 31.16 -15 55 24.2 r 620
2003-11-15 00:42:21 C 02 22 31.57 -15 55 17.4 r 620
2003-11-17 05:26:08 C 02 46 51.04 -09 26 38.5 c 670
2003-11-17 06:01:47 C 02 47 04.96 -09 22 23.5 c 670
2003-11-17 07:13:39 C 02 47 32.83 -09 13 47.6 c 670
2003-11-17 13:05:49 C 02 50 05.31 -08 31 50.9 355
2003-11-17 13:08:09 C 02 50 06.21 -08 31 34.3 355
2003-11-17 13:11:52 C 02 50 07.64 -08 31 07.8 355
2003-11-17 13:13:11 C 02 50 08.15 -08 30 58.8 355
2003-11-17 22:43:03 C 02 54 06.50 -07 23 58.2 r 458
2003-11-17 22:45:59 C 02 54 07.60 -07 23 38.0 r 458
2003-11-17 22:52:00 C 02 54 09.88 -07 22 55.8 r 458
2003-11-20 06:36:08 C 03 15 34.192 -01 11 17.46 645
2003-11-20 06:37:20 C 03 15 34.546 -01 11 09.89 645
2003-11-20 06:38:32 C 03 15 34.945 -01 11 02.48 645
2003-11-20 06:39:43 C 03 15 35.330 -01 10 54.62 645
2003-11-20 06:40:55 C 03 15 35.707 -01 10 47.52 645
2003-11-20 21:25:09 C 03 20 47.15 +00 19 17.8 r 557
2003-11-20 21:55:21 C 03 20 56.61 +00 22 20.1 r 557
2003-11-20 21:56:52 C 03 20 57.085 +00 22 29.13 X 557
2003-11-20 22:20:16 C 03 21 04.402 +00 24 50.29 X 557
2003-11-20 22:25:33 C 03 21 06.05 +00 25 22.1 r 557
2003-11-20 22:26:19 C 03 21 06.287 +00 25 26.59 X 557
2003-11-20 22:43:41 C 03 21 11.707 +00 27 11.14 X 557
2003-11-20 22:55:47 C 03 21 15.48 +00 28 23.9 r 557
2003-11-20 23:00:18 C 03 21 16.901 +00 28 51.28 X 557
2003-11-20 23:26:09 C 03 21 24.96 +00 31 26.5 r 557
2003-11-20 23:54:59 C 03 21 33.98 +00 34 19.5 r 557
2003-11-21 00:24:26 C 03 21 43.21 +00 37 15.9 r 557
2003-11-21 00:54:40 C 03 21 52.74 +00 40 16.9 r 557
2003-11-21 01:24:52 C 03 22 02.31 +00 43 17.3 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)