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
2022-09-26 23:13:50 C 03 23 19.76 -33 27 51.9 q M47
2022-09-26 23:15:06 C 03 23 20.40 -33 27 49.1 q M47
2022-09-26 23:16:21 C 03 23 20.91 -33 27 47.5 q M47
2022-09-26 23:17:36 C 03 23 21.50 -33 27 45.6 q M47
2022-09-26 23:18:50 C 03 23 22.04 -33 27 43.9 q M47
2022-09-26 23:20:05 C 03 23 22.57 -33 27 41.5 q M47
2022-09-26 23:21:21 C 03 23 23.25 -33 27 40.0 q M47
2022-09-26 23:22:36 C 03 23 23.89 -33 27 38.5 q M47
2022-09-26 23:23:51 C 03 23 24.43 -33 27 35.1 q M47
2022-09-26 23:25:05 C 03 23 25.08 -33 27 33.8 q M47
2022-09-26 23:26:20 C 03 23 25.56 -33 27 30.9 q M47
2022-09-26 23:27:35 C 03 23 26.05 -33 27 29.2 q M47
2022-09-26 23:28:51 C 03 23 26.72 -33 27 27.7 q M47
2022-09-26 23:30:06 C 03 23 27.18 -33 27 25.7 q M47
2022-09-26 23:31:20 C 03 23 27.80 -33 27 24.1 q M47
2022-09-26 23:32:35 C 03 23 28.50 -33 27 21.2 q M47
2022-09-27 01:07:48 C 03 24 15.01 -33 25 05.6 V C40
2022-09-27 01:33:10 C 03 24 26.93 -33 24 23.9 V C40
2022-09-27 01:58:49 C 03 24 39.01 -33 23 40.6 V C40
2022-09-27 02:49:02 C 03 25 05.98 -33 22 24.8 V 204
2022-09-27 02:58:21 C 03 25 10.35 -33 22 09.6 V 204
2022-09-27 03:07:40 C 03 25 14.73 -33 21 54.5 V 204
2022-09-27 03:37:34 C 03 25 39.38 -33 19 37.8 H78
2022-09-27 03:38:24 C 03 25 39.79 -33 19 36.9 H78
2022-09-27 03:41:43 C 03 25 41.39 -33 19 32.2 H78
2022-09-27 03:42:33 C 03 25 41.78 -33 19 31.1 H78
2022-09-27 03:44:12 C 03 25 42.58 -33 19 28.8 H78
2022-09-27 03:45:02 C 03 25 42.99 -33 19 27.6 H78
2022-09-27 03:49:11 C 03 25 44.98 -33 19 22.0 H78
2022-09-27 03:50:01 C 03 25 45.37 -33 19 20.7 H78
2022-09-27 06:22:21 C 03 26 55.680 -33 14 46.28 V W68
2022-09-27 06:26:15 C 03 26 57.523 -33 14 40.06 V W68
2022-09-27 06:33:24 C 03 27 00.833 -33 14 28.97 V W68
2022-09-27 07:03:57 C 03 27 15.019 -33 13 40.44 V W68
2022-09-27 09:43:18 C 03 28 34.25 -33 10 55.5 U V16
2022-09-27 09:46:39 C 03 28 35.82 -33 10 50.0 U V16
2022-09-27 09:49:23 C 03 28 37.12 -33 10 45.2 U V16
2022-09-27 09:54:53 C 03 28 39.65 -33 10 36.5 U V16
2022-09-27 09:59:28 C 03 28 41.78 -33 10 28.6 U V16
2022-09-27 10:04:04 C 03 28 43.91 -33 10 21.1 U V16
2022-09-27 10:08:39 C 03 28 46.02 -33 10 13.6 U V16
2022-09-27 10:17:48 C 03 28 50.30 -33 09 57.9 U V16
2022-09-27 22:48:53 C 03 35 09.89 -32 47 51.9 q 088
2022-09-27 23:18:18 C 03 35 23.68 -32 47 01.8 q 088
2022-09-27 23:19:21 C 03 35 24.10 -32 46 58.8 q 088
2022-09-27 23:20:24 C 03 35 24.61 -32 46 57.4 q 088
2022-09-27 23:21:28 C 03 35 25.09 -32 46 55.2 q 088
2022-09-27 23:22:31 C 03 35 25.59 -32 46 53.4 q 088
2022-09-27 23:24:43 C 03 35 26.63 -32 46 51.4 q 088
2022-09-27 23:25:46 C 03 35 27.09 -32 46 48.9 q 088
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)