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
2023-01-04 02:41:53 C 07 38 48.142 +29 50 43.12 V Y90
2023-01-04 17:01:39 C 07 37 51.74 +29 55 19.9 q C97
2023-01-04 17:05:15 C 07 37 51.50 +29 55 21.0 q C97
2023-01-04 17:10:14 C 07 37 51.11 +29 55 23.1 q C97
2023-01-04 17:15:14 C 07 37 50.76 +29 55 24.2 q C97
2023-01-04 20:20:52 C 07 37 37.74 +29 56 11.3 V M26
2023-01-04 20:36:29 C 07 37 36.62 +29 56 16.8 V M26
2023-01-06 00:24:25 C 07 35 42.77 +30 04 26.9 V 130
2023-01-06 00:25:33 C 07 35 42.69 +30 04 27.0 V 130
2023-01-06 00:27:06 C 07 35 42.58 +30 04 27.5 V 130
2023-01-06 00:28:37 C 07 35 42.46 +30 04 27.9 V 130
2023-01-08 16:04:52 C 07 31 37.87 +30 20 08.8 V C40
2023-01-08 16:24:43 C 07 31 36.63 +30 20 14.2 V C40
2023-01-08 17:44:32 C 07 31 31.44 +30 20 35.1 V C40
2023-01-08 17:45:06 C 07 31 31.41 +30 20 35.1 V C40
2023-01-08 17:45:17 C 07 31 31.40 +30 20 35.1 V C40
2023-01-08 17:47:19 C 07 31 31.27 +30 20 35.6 V C40
2023-01-08 18:18:06 C 07 31 29.15 +30 20 43.3 V C40
2023-01-08 18:20:52 C 07 31 28.96 +30 20 44.2 V C40
2023-01-08 18:21:27 C 07 31 28.91 +30 20 44.2 V C40
2023-01-08 18:21:37 C 07 31 28.89 +30 20 44.4 V C40
2023-01-08 18:21:48 C 07 31 28.88 +30 20 44.3 V C40
2023-01-09 23:00:18 C 07 29 41.95 +30 26 40.1 V C40
2023-01-09 23:06:33 C 07 29 41.51 +30 26 41.3 V C40
2023-01-09 23:12:43 C 07 29 41.08 +30 26 42.4 V C40
2023-01-10 00:33:36 C 07 29 35.68 +30 26 56.1 V B18
2023-01-10 00:35:17 C 07 29 35.57 +30 26 56.4 V B18
2023-01-10 00:35:52 C 07 29 35.53 +30 26 56.5 V B18
2023-01-10 00:36:26 C 07 29 35.49 +30 26 56.6 V B18
2023-01-10 00:37:01 C 07 29 35.46 +30 26 56.6 V B18
2023-01-10 00:37:35 C 07 29 35.42 +30 26 56.8 V B18
2023-01-10 00:39:10 C 07 29 35.32 +30 26 57.0 V B18
2023-01-10 00:39:43 C 07 29 35.28 +30 26 57.1 V B18
2023-01-10 00:40:19 C 07 29 35.25 +30 26 57.2 V B18
2023-01-10 00:40:52 C 07 29 35.21 +30 26 57.3 V B18
2023-01-10 00:41:26 C 07 29 35.17 +30 26 57.4 V B18
2023-01-10 03:07:58 C 07 29 26.39 +30 27 24.6 X C95
2023-01-10 03:15:54 C 07 29 25.90 +30 27 26.7 X C95
2023-01-10 03:22:53 C 07 29 25.41 +30 27 27.3 X C95
2023-01-10 16:59:20 C 07 28 39.73 +30 29 54.2 V C40
2023-01-10 17:11:11 C 07 28 38.99 +30 29 56.6 V C40
2023-01-10 17:22:50 C 07 28 38.26 +30 29 59.2 V C40
2023-01-10 19:10:02 C 07 28 32.00 +30 30 18.0 q A77
2023-01-10 19:18:42 C 07 28 31.48 +30 30 19.9 q A77
2023-01-10 19:26:17 C 07 28 31.03 +30 30 21.4 q A77
2023-01-10 20:42:06 C 07 28 26.23 +30 30 37.6 V M26
2023-01-10 20:48:13 C 07 28 25.85 +30 30 38.8 V M26
2023-01-10 20:54:19 C 07 28 25.45 +30 30 39.9 V M26
2023-01-10 22:57:13 C 07 28 16.65 +30 31 02.9 V B18
2023-01-10 22:57:49 C 07 28 16.62 +30 31 02.9 V B18
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)