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
2003-11-23 00:55:20 C 03 37 07.81 +05 09 27.5 r 620
2003-11-23 01:03:33 C 03 37 10.00 +05 10 10.2 r 620
2003-11-23 01:06:29 C 03 37 10.79 +05 10 25.4 r 620
2003-11-23 01:09:20 C 03 37 11.54 +05 10 40.2 r 620
2003-11-23 07:09:29 C 03 39 00.33 +05 41 51.5 o 699
2003-11-23 07:28:31 C 03 39 05.20 +05 43 28.8 o 699
2003-11-23 07:47:34 C 03 39 10.10 +05 45 06.0 o 699
2003-11-23 08:06:34 C 03 39 15.01 +05 46 42.5 o 699
2003-11-24 03:35:02 C 03 44 51.29 +07 23 05.8 c H41
2003-11-24 03:43:05 C 03 44 53.22 +07 23 44.3 c H41
2003-11-24 03:55:14 C 03 44 56.30 +07 24 43.8 c H41
2003-11-24 03:56:53 C 03 44 56.65 +07 24 52.0 c H41
2003-11-24 04:01:40 C 03 44 57.84 +07 25 15.7 c H41
2003-11-24 04:03:19 C 03 44 58.25 +07 25 22.7 c H41
2003-11-24 04:10:23 C 03 44 59.98 +07 25 56.9 c H41
2003-11-24 04:11:43 C 03 45 00.30 +07 26 03.4 c H41
2003-11-24 04:13:25 C 03 45 00.68 +07 26 11.4 c H41
2003-11-24 04:14:47 C 03 45 01.05 +07 26 18.2 c H41
2003-11-24 04:16:07 C 03 45 01.38 +07 26 24.3 c H41
2003-11-24 04:17:34 C 03 45 01.73 +07 26 31.3 c H41
2003-11-24 04:19:07 C 03 45 02.09 +07 26 38.8 c H41
2003-11-24 04:22:14 C 03 45 02.86 +07 26 54.2 c H41
2003-11-24 04:24:15 C 03 45 03.34 +07 27 03.3 c H41
2003-11-24 04:26:20 C 03 45 03.85 +07 27 13.5 c H41
2003-11-25 06:41:37 C 03 51 55.11 +09 27 45.5 c H41
2003-11-25 06:43:11 C 03 51 55.45 +09 27 52.1 c H41
2003-11-25 06:44:23 C 03 51 55.73 +09 27 57.6 c H41
2003-11-25 06:46:01 C 03 51 56.08 +09 28 04.5 c H41
2003-11-25 06:53:00 C 03 51 57.64 +09 28 35.1 c H41
2003-11-25 06:56:09 C 03 51 58.33 +09 28 48.8 c H41
2003-11-25 06:58:14 C 03 51 58.82 +09 28 58.0 c H41
2003-11-25 14:07:28 C 03 53 49.44 +10 00 02.7 m 379
2003-11-25 14:12:03 C 03 53 50.46 +10 00 22.7 m 379
2003-11-25 14:23:05 C 03 53 52.85 +10 01 10.2 m 379
2003-11-25 14:24:38 C 03 53 53.17 +10 01 16.7 m 379
2003-11-25 21:23:31 C 03 55 40.72 +10 30 36.6 r 938
2003-11-25 21:25:32 C 03 55 41.16 +10 30 45.0 r 938
2003-11-25 21:27:32 C 03 55 41.59 +10 30 53.6 r 938
2003-11-25 21:29:32 C 03 55 42.05 +10 31 02.1 r 938
2003-11-25 21:31:33 C 03 55 42.47 +10 31 10.6 r 938
2003-11-25 21:38:34 C 03 55 44.03 +10 31 40.5 r 938
2003-11-25 21:40:35 C 03 55 44.48 +10 31 49.1 r 938
2003-11-25 21:42:35 C 03 55 44.91 +10 31 57.6 r 938
2003-11-25 21:44:36 C 03 55 45.36 +10 32 06.0 r 938
2003-11-25 21:46:37 C 03 55 45.79 +10 32 14.7 r 938
2003-11-26 12:31:30 C 03 59 15.80 +11 32 34.8 355
2003-11-26 12:32:55 C 03 59 16.12 +11 32 40.5 355
2003-11-26 12:34:45 C 03 59 16.55 +11 32 47.7 355
2003-11-26 12:36:24 C 03 59 16.84 +11 32 54.4 355
2003-11-26 12:37:56 C 03 59 17.15 +11 33 00.9 355
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)