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
2022-09-27 23:26:49 C 03 35 27.51 -32 46 46.0 q 088
2022-09-27 23:27:52 C 03 35 28.08 -32 46 44.0 q 088
2022-09-27 23:28:56 C 03 35 28.55 -32 46 43.1 q 088
2022-09-27 23:29:59 C 03 35 29.06 -32 46 40.8 q 088
2022-09-27 23:31:02 C 03 35 29.50 -32 46 39.3 q 088
2022-09-27 23:33:44 C 03 35 30.80 -32 46 34.0 q 088
2022-09-27 23:34:47 C 03 35 31.31 -32 46 32.9 q 088
2022-09-27 23:35:50 C 03 35 31.76 -32 46 30.5 q 088
2022-09-27 23:36:54 C 03 35 32.12 -32 46 27.6 q 088
2022-09-27 23:37:57 C 03 35 32.80 -32 46 27.7 q 088
2022-09-27 23:39:00 C 03 35 33.25 -32 46 24.6 q 088
2022-09-27 23:40:04 C 03 35 33.75 -32 46 22.6 q 088
2022-09-27 23:42:44 C 03 35 34.95 -32 46 18.1 q 088
2022-09-27 23:43:47 C 03 35 35.48 -32 46 16.0 q 088
2022-09-27 23:44:51 C 03 35 36.05 -32 46 15.8 q 088
2022-09-27 23:45:55 C 03 35 36.49 -32 46 13.6 q 088
2022-09-27 23:46:58 C 03 35 37.08 -32 46 11.5 q 088
2022-09-27 23:48:02 C 03 35 37.49 -32 46 09.8 q 088
2022-09-27 23:49:05 C 03 35 37.93 -32 46 07.2 q 088
2022-09-27 23:51:45 C 03 35 39.30 -32 46 04.1 q 088
2022-09-27 23:52:49 C 03 35 39.77 -32 46 02.5 q 088
2022-09-27 23:53:52 C 03 35 40.29 -32 45 59.5 q 088
2022-09-27 23:54:55 C 03 35 40.55 -32 45 56.6 q 088
2022-09-27 23:55:58 C 03 35 41.29 -32 45 55.7 q 088
2022-09-27 23:57:02 C 03 35 41.74 -32 45 53.9 q 088
2022-09-27 23:58:05 C 03 35 42.22 -32 45 52.8 q 088
2022-09-28 00:00:47 C 03 35 43.53 -32 45 46.1 q 088
2022-09-28 00:01:50 C 03 35 43.95 -32 45 44.8 q 088
2022-09-28 00:02:53 C 03 35 44.44 -32 45 43.0 q 088
2022-09-28 00:03:57 C 03 35 45.04 -32 45 41.1 q 088
2022-09-28 00:05:00 C 03 35 45.48 -32 45 40.9 q 088
2022-09-28 00:06:03 C 03 35 45.84 -32 45 36.1 q 088
2022-09-28 00:07:06 C 03 35 46.42 -32 45 34.8 q 088
2022-09-28 03:24:26 C 03 37 32.17 -32 38 07.6 H78
2022-09-28 03:26:55 C 03 37 33.39 -32 38 03.6 H78
2022-09-28 03:32:43 C 03 37 36.25 -32 37 54.2 H78
2022-09-28 03:34:23 C 03 37 37.06 -32 37 51.8 H78
2022-09-28 03:36:52 C 03 37 38.25 -32 37 47.7 H78
2022-09-28 03:39:22 C 03 37 39.48 -32 37 43.7 H78
2022-09-28 03:40:11 C 03 37 39.88 -32 37 42.3 H78
2022-09-28 03:41:01 C 03 37 40.25 -32 37 40.9 H78
2022-09-28 03:41:50 C 03 37 40.66 -32 37 39.7 H78
2022-09-28 03:42:40 C 03 37 41.09 -32 37 38.5 H78
2022-09-28 03:46:00 C 03 37 42.70 -32 37 33.0 H78
2022-09-28 04:23:13 C 03 37 58.55 -32 35 32.7 q I47
2022-09-28 04:34:25 C 03 38 03.92 -32 35 13.7 q I47
2022-09-28 04:56:43 C 03 38 14.57 -32 34 35.2 q I47
2022-09-28 09:41:29 C 03 40 39.33 -32 24 52.4 q E94
2022-09-28 09:43:35 C 03 40 40.37 -32 24 48.6 q E94
2022-09-28 09:48:11 C 03 40 42.66 -32 24 40.9 q E94
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)