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
2003-11-26 19:43:31 C 04 00 56.98 +12 00 18.6 c J94
2003-11-26 19:46:31 C 04 00 57.63 +12 00 30.6 c J94
2003-11-26 19:50:20 C 04 00 58.47 +12 00 45.9 c J94
2003-11-27 03:34:31 C 04 02 43.90 +12 31 05.1 c 711
2003-11-27 03:38:00 C 04 02 44.58 +12 31 18.4 c 711
2003-11-27 03:41:30 C 04 02 45.29 +12 31 31.9 c 711
2003-11-27 04:23:34 C 04 02 51.14 +12 34 25.3 12.6 d H72
2003-11-27 04:25:14 C 04 02 51.43 +12 34 31.8 12.4 d H72
2003-11-27 04:26:55 C 04 02 51.71 +12 34 38.0 12.4 d H72
2003-11-27 04:28:37 C 04 02 52.05 +12 34 44.4 12.4 d H72
2003-11-27 05:58:23 C 04 03 09.11 +12 40 21.8 12.5 d H72
2003-11-27 06:00:01 C 04 03 09.43 +12 40 28.0 12.5 d H72
2003-11-27 06:01:41 C 04 03 09.77 +12 40 34.2 12.5 d H72
2003-11-27 06:03:19 C 04 03 10.05 +12 40 40.3 12.5 d H72
2003-11-27 09:45:10 C 04 03 53.79 +12 54 12.1 12.8 d H72
2003-11-27 09:46:48 C 04 03 54.16 +12 54 18.2 12.5 d H72
2003-11-27 09:48:29 C 04 03 54.50 +12 54 24.3 13.2 d H72
2003-11-27 09:50:09 C 04 03 54.89 +12 54 30.0 12.7 d H72
2003-11-27 13:30:01 C 04 04 51.72 +13 07 58.5 m 379
2003-11-27 13:31:41 C 04 04 52.02 +13 08 04.6 m 379
2003-11-27 13:33:19 C 04 04 52.31 +13 08 10.4 m 379
2003-11-27 13:44:22 C 04 04 54.43 +13 08 51.2 m 379
2003-11-27 13:46:00 C 04 04 54.73 +13 08 57.1 m 379
2003-11-27 18:38:20 C 04 06 01.09 +13 25 59.7 r 557
2003-11-27 18:59:29 C 04 06 05.36 +13 27 17.1 r 557
2003-11-27 19:01:48 C 04 06 05.821 +13 27 25.53 X 557
2003-11-27 19:23:30 C 04 06 10.76 +13 28 37.6 c J93
2003-11-27 19:26:44 C 04 06 11.45 +13 28 50.0 c J93
2003-11-27 19:27:48 C 04 06 11.70 +13 28 53.8 c J93
2003-11-27 19:28:52 C 04 06 11.87 +13 28 57.5 c J93
2003-11-27 19:41:54 C 04 06 13.786 +13 29 51.59 X 557
2003-11-27 19:58:18 C 04 06 17.028 +13 30 51.68 X 557
2003-11-27 20:14:44 C 04 06 20.227 +13 31 51.01 X 557
2003-11-27 20:15:55 C 04 06 20.45 +13 31 55.4 r 557
2003-11-27 20:30:23 C 04 06 23.255 +13 32 47.64 X 557
2003-11-27 21:12:39 C 04 06 31.385 +13 35 19.99 X 557
2003-11-27 21:17:21 C 04 06 32.28 +13 35 36.8 r 557
2003-11-27 21:24:23 C 04 06 33.624 +13 36 02.10 X 557
2003-11-27 21:40:08 C 04 06 37.91 +13 36 53.7 c J94
2003-11-27 21:40:49 C 04 06 36.749 +13 37 00.95 X 557
2003-11-27 21:41:28 C 04 06 38.18 +13 36 58.4 c J94
2003-11-27 21:43:01 C 04 06 38.46 +13 37 04.1 c J94
2003-11-27 21:44:21 C 04 06 37.42 +13 37 13.6 r 557
2003-11-27 21:58:26 C 04 06 40.091 +13 38 04.01 X 557
2003-11-27 22:14:52 C 04 06 43.195 +13 39 02.37 X 557
2003-11-27 22:27:46 C 04 06 45.64 +13 39 48.4 r 557
2003-11-29 18:46:14 C 04 15 38.94 +16 05 32.1 r 557
2003-11-29 19:15:46 C 04 15 44.10 +16 07 04.3 r 557
2003-11-29 19:45:19 C 04 15 49.19 +16 08 36.1 r 557
2003-11-29 20:16:15 C 04 15 54.44 +16 10 11.8 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)