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
2003-12-05 20:21:36 C 04 38 06.05 +21 55 56.3 c 130
2003-12-05 20:26:45 C 04 38 05.04 +21 55 48.2 c 174
2003-12-05 21:02:30 C 04 38 10.49 +21 57 14.2 A30
2003-12-05 21:04:46 C 04 38 10.71 +21 57 18.6 A30
2003-12-05 21:12:19 C 04 38 11.52 +21 57 32.6 A30
2003-12-05 21:15:01 C 04 38 11.82 +21 57 37.7 A30
2003-12-05 21:19:26 C 04 38 12.30 +21 57 46.3 A30
2003-12-05 22:19:31 C 04 38 19.01 +21 59 40.0 r 203
2003-12-05 23:56:59 C 04 38 29.39 +22 02 39.9 r 203
2003-12-06 00:32:28 C 04 38 33.19 +22 03 44.3 r 203
2003-12-09 16:10:11 C 04 48 27.81 +24 23 24.6 o 084
2003-12-09 18:56:20 C 04 48 44.86 +24 27 26.9 c 127
2003-12-09 19:24:10 C 04 48 47.43 +24 28 07.0 c 127
2003-12-09 19:30:57 C 04 48 48.05 +24 28 16.8 c 127
2003-12-09 19:36:59 C 04 48 48.57 +24 28 25.5 c 127
2003-12-10 21:21:42 C 04 51 16.84 +25 02 18.1 c 127
2003-12-10 21:27:25 C 04 51 17.28 +25 02 25.6 c 127
2003-12-10 21:32:41 C 04 51 17.71 +25 02 32.6 c 127
2003-12-10 21:37:42 C 04 51 18.10 +25 02 39.0 c 127
2003-12-10 21:52:31 C 04 51 19.28 +25 02 57.9 c 127
2003-12-11 08:02:31 C 04 52 12.32 +25 15 47.3 c H41
2003-12-11 08:06:35 C 04 52 12.63 +25 15 52.0 c H41
2003-12-11 08:09:41 C 04 52 12.86 +25 15 55.6 c H41
2003-12-11 08:16:22 C 04 52 13.38 +25 16 03.3 c H41
2003-12-11 08:21:06 C 04 52 13.74 +25 16 08.5 c H41
2003-12-11 08:23:09 C 04 52 13.90 +25 16 11.0 c H41
2003-12-11 20:07:08 C 04 53 23.68 +25 29 59.0 r 938
2003-12-11 21:29:26 C 04 53 30.05 +25 31 41.2 r 938
2003-12-12 13:08:16 C 04 54 50.82 +25 49 38.1 m 379
2003-12-12 13:10:24 C 04 54 50.91 +25 49 41.0 m 379
2003-12-12 13:12:33 C 04 54 51.10 +25 49 43.3 m 379
2003-12-12 22:05:51 C 04 55 35.87 +25 59 13.9 r 203
2003-12-12 23:13:13 C 04 55 40.50 +26 00 26.8 r 203
2003-12-13 13:02:51 C 04 56 50.61 +26 15 09.1 m 379
2003-12-13 13:05:00 C 04 56 50.75 +26 15 11.4 m 379
2003-12-13 13:07:08 C 04 56 50.90 +26 15 14.0 m 379
2003-12-13 13:09:18 C 04 56 51.03 +26 15 16.1 m 379
2003-12-13 14:58:31 C 04 56 57.93 +26 17 07.6 355
2003-12-13 15:00:56 C 04 56 58.10 +26 17 10.0 355
2003-12-13 15:03:16 C 04 56 58.23 +26 17 12.6 355
2003-12-13 15:06:27 C 04 56 58.45 +26 17 15.5 355
2003-12-13 15:08:40 C 04 56 58.57 +26 17 18.0 355
2003-12-14 21:53:00 C 04 59 25.04 +26 47 00.0 r 203
2003-12-14 22:47:55 C 04 59 29.25 +26 47 56.1 r 458
2003-12-14 22:54:29 C 04 59 28.83 +26 47 57.5 r 203
2003-12-14 22:56:51 C 04 59 29.77 +26 48 04.1 r 458
2003-12-15 05:38:50 C 04 59 59.29 +26 54 18.1 c H41
2003-12-15 05:41:19 C 04 59 59.43 +26 54 20.3 c H41
2003-12-15 05:45:23 C 04 59 59.66 +26 54 23.9 c H41
2003-12-15 05:47:37 C 04 59 59.79 +26 54 25.9 c H41
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)