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
2003-11-29 20:45:49 C 04 15 59.42 +16 11 42.9 r 557
2003-11-29 21:19:27 C 04 16 05.00 +16 13 25.8 r 557
2003-11-29 21:44:59 C 04 16 09.22 +16 14 43.6 r 557
2003-11-29 22:15:54 C 04 16 14.30 +16 16 17.3 r 557
2003-11-29 23:15:37 C 04 16 24.07 +16 19 17.0 r 557
2003-11-29 23:45:15 C 04 16 28.91 +16 20 45.3 r 557
2003-11-30 00:16:11 C 04 16 33.99 +16 22 17.0 r 557
2003-11-30 00:45:23 C 04 16 38.80 +16 23 43.1 r 557
2003-11-30 01:12:13 C 04 16 43.27 +16 25 02.1 r 557
2003-11-30 01:45:50 C 04 16 48.90 +16 26 40.2 r 557
2003-11-30 02:15:24 C 04 16 53.91 +16 28 06.3 r 557
2003-11-30 02:25:01 C 04 17 04.04 +16 29 17.6 12.3 d H72
2003-11-30 02:27:00 C 04 17 04.34 +16 29 23.8 12.6 d H72
2003-11-30 02:29:01 C 04 17 04.71 +16 29 29.8 12.8 d H72
2003-11-30 02:31:00 C 04 17 05.00 +16 29 35.9 12.0 d H72
2003-11-30 02:45:10 C 04 16 59.01 +16 29 32.3 r 557
2003-11-30 03:16:05 C 04 17 04.38 +16 31 01.7 r 557
2003-11-30 07:07:12 C 04 17 47.60 +16 43 12.1 12.6 d H72
2003-11-30 07:09:12 C 04 17 47.88 +16 43 17.7 12.8 d H72
2003-11-30 07:11:11 C 04 17 48.21 +16 43 23.6 12.5 d H72
2003-11-30 07:13:11 C 04 17 48.57 +16 43 29.2 11.2 d H72
2003-11-30 19:43:57 C 04 20 10.06 +17 18 42.4 r 170
2003-11-30 19:49:10 C 04 20 10.90 +17 18 57.6 r 170
2003-11-30 19:51:31 C 04 20 11.26 +17 19 04.4 r 170
2003-12-01 06:01:28 C 04 21 52.89 +17 47 24.5 14.0 c 704
2003-12-01 06:19:38 C 04 21 55.50 +17 48 14.2 14.1 c 704
2003-12-01 06:36:56 C 04 21 57.96 +17 49 00.9 14.1 c 704
2003-12-01 06:55:54 C 04 22 00.70 +17 49 52.5 14.4 c 704
2003-12-01 07:14:17 C 04 22 03.28 +17 50 41.3 14.3 c 704
2003-12-01 14:25:21 C 04 23 16.26 +18 09 46.2 m 379
2003-12-01 14:26:59 C 04 23 16.50 +18 09 50.5 m 379
2003-12-01 14:28:39 C 04 23 16.72 +18 09 54.8 m 379
2003-12-01 14:30:18 C 04 23 16.96 +18 09 59.0 m 379
2003-12-01 14:31:56 C 04 23 17.20 +18 10 03.4 m 379
2003-12-01 14:36:54 C 04 23 17.88 +18 10 16.1 m 379
2003-12-03 03:00:38 C 04 29 06.96 +19 39 49.8 P 716
2003-12-03 04:25:57 C 04 29 18.35 +19 43 13.8 P 716
2003-12-03 04:53:32 C 04 29 21.87 +19 44 18.9 P 716
2003-12-03 05:19:00 C 04 29 25.17 +19 45 18.7 P 716
2003-12-03 05:41:59 C 04 29 28.06 +19 46 11.7 P 716
2003-12-03 13:47:54 C 04 30 39.45 +20 04 41.9 m 379
2003-12-03 13:51:12 C 04 30 39.83 +20 04 49.7 m 379
2003-12-03 13:54:31 C 04 30 40.23 +20 04 56.9 m 379
2003-12-03 13:57:49 C 04 30 40.65 +20 05 04.7 m 379
2003-12-04 04:01:35 C 04 32 41.85 +20 35 32.6 k H79
2003-12-04 04:04:41 C 04 32 42.23 +20 35 40.0 k H79
2003-12-04 04:12:31 C 04 32 43.17 +20 35 56.6 k H79
2003-12-04 04:15:42 C 04 32 43.52 +20 36 02.8 k H79
2003-12-04 04:16:32 C 04 32 43.68 +20 36 05.2 k H79
2003-12-04 04:18:39 C 04 32 43.88 +20 36 09.6 k H79
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)