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
2003-08-10 02:43:54 C 21 08 15.18 -30 57 09.4 m 859
2003-08-17 05:12:37 C 20 59 50.19 -33 27 07.2 r 649
2003-08-17 05:20:16 C 20 59 49.74 -33 27 14.0 r 649
2003-08-17 05:27:48 C 20 59 49.26 -33 27 20.3 r 649
2003-08-17 05:35:19 C 20 59 48.79 -33 27 27.0 r 649
2003-08-17 23:39:44 C 20 58 50.12 -33 43 25.6 c 952
2003-08-17 23:46:15 C 20 58 49.71 -33 43 31.1 c 952
2003-08-17 23:47:43 C 20 58 49.59 -33 43 31.8 c 952
2003-08-17 23:51:19 C 20 58 49.39 -33 43 35.3 c 952
2003-08-17 23:55:40 C 20 58 49.15 -33 43 39.9 c 952
2003-08-17 23:59:40 C 20 58 48.86 -33 43 43.0 c 952
2003-08-18 00:07:16 C 20 58 48.44 -33 43 48.5 c 952
2003-08-18 00:12:09 C 20 58 48.07 -33 43 52.3 c 952
2003-08-18 00:19:40 C 20 58 47.57 -33 43 59.5 c 952
2003-08-18 00:27:55 C 20 58 47.08 -33 44 06.4 c 952
2003-08-18 00:31:46 C 20 58 46.79 -33 44 10.5 c 952
2003-08-19 01:36:08 C 20 57 25.64 -34 05 52.9 m 859
2003-08-19 01:42:06 C 20 57 25.25 -34 05 58.6 m 859
2003-08-19 01:49:16 C 20 57 24.77 -34 06 05.7 m 859
2003-09-03 09:10:35 C 20 37 26.38 -39 06 48.7 r 428
2003-09-03 09:22:19 C 20 37 25.69 -39 06 58.1 r 428
2003-09-03 09:47:04 C 20 37 24.23 -39 07 17.2 r 428
2003-09-10 12:13:57 C 20 30 40.830 -41 02 21.32 r 413
2003-09-10 12:16:27 C 20 30 40.716 -41 02 22.80 r 413
2003-09-10 12:18:43 C 20 30 40.610 -41 02 24.17 r 413
2003-09-11 11:30:14 C 20 29 59.96 -41 16 32.5 474
2003-09-11 11:33:14 C 20 29 59.86 -41 16 34.1 474
2003-09-11 12:42:42 C 20 29 57.916 -41 17 27.67 r 413
2003-09-11 12:44:42 C 20 29 57.832 -41 17 28.67 r 413
2003-09-11 12:46:42 C 20 29 57.739 -41 17 29.88 r 413
2003-09-18 11:43:22 C 20 27 15.78 -42 52 02.8 r 428
2003-09-18 12:16:31 C 20 27 15.10 -42 52 17.6 r 428
2003-10-15 10:26:30 C 21 12 10.33 -47 08 35.6 r 428
2003-10-15 10:28:56 C 21 12 10.71 -47 08 36.0 r 428
2003-10-15 10:31:20 C 21 12 11.06 -47 08 36.4 r 428
2003-10-15 10:34:38 C 21 12 11.51 -47 08 36.9 r 428
2003-11-01 12:40:27 C 23 23 01.30 -43 54 22.1 r 428
2003-11-01 12:41:50 C 23 23 01.93 -43 54 18.8 r 428
2003-11-01 12:43:16 C 23 23 02.59 -43 54 15.6 r 428
2003-11-01 12:46:03 C 23 23 03.88 -43 54 09.0 r 428
2003-11-10 12:49:21 C 01 25 10.24 -28 42 15.5 13.6 r D85
2003-11-10 12:54:33 C 01 25 12.95 -28 41 41.4 13.6 r D85
2003-11-10 13:02:19 C 01 25 17.00 -28 40 51.1 13.5 r D85
2003-11-11 20:50:36 C 01 43 12.33 -25 09 39.9 r 620
2003-11-11 20:51:33 C 01 43 12.81 -25 09 33.5 r 620
2003-11-11 20:52:29 C 01 43 13.29 -25 09 26.9 r 620
2003-11-11 20:53:26 C 01 43 13.78 -25 09 20.6 r 620
2003-11-11 20:54:23 C 01 43 14.24 -25 09 14.1 r 620
2003-11-11 20:55:19 C 01 43 14.72 -25 09 07.7 r 620
2003-11-11 20:56:15 C 01 43 15.20 -25 09 01.3 r 620
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)