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
2004-01-17 01:58:48 C 05 41 23.58 +30 53 37.9 o H88
2004-01-17 02:46:06 C 05 41 25.94 +30 53 43.1 16.9 d H72
2004-01-17 02:50:46 C 05 41 26.09 +30 53 43.7 17.1 d H72
2004-01-17 02:55:27 C 05 41 26.22 +30 53 43.9 18.5 d H72
2004-01-17 03:00:07 C 05 41 26.46 +30 53 44.1 17.0 d H72
2004-01-17 22:23:12 C 05 42 25.17 +30 53 32.9 r 941
2004-01-17 22:25:07 C 05 42 25.26 +30 53 32.8 r 941
2004-01-17 22:27:02 C 05 42 25.34 +30 53 32.8 r 941
2004-01-17 22:28:18 C 05 42 25.40 +30 53 32.8 r 941
2004-01-19 04:43:26 C 05 43 58.47 +30 53 11.4 c H41
2004-01-19 04:51:37 C 05 43 58.87 +30 53 11.2 c H41
2004-01-19 04:59:30 C 05 43 59.21 +30 53 11.2 c H41
2004-01-19 05:33:25 C 05 44 01.46 +30 53 11.9 17.8 c 704
2004-01-19 05:51:39 C 05 44 02.25 +30 53 11.4 17.8 c 704
2004-01-19 06:10:05 C 05 44 03.08 +30 53 10.9 17.8 c 704
2004-01-20 04:00:14 C 05 45 11.65 +30 52 41.7 17.5 c 704
2004-01-20 04:22:34 C 05 45 12.70 +30 52 41.9 18.0 c 704
2004-01-20 04:50:10 C 05 45 13.93 +30 52 40.7 17.7 c 704
2004-01-23 20:32:44 C 05 49 54.46 +30 49 10.3 o 084
2004-01-24 05:04:42 C 05 50 21.80 +30 48 53.3 17.8 d H72
2004-01-24 05:09:52 C 05 50 22.08 +30 48 54.0 17.0 d H72
2004-01-24 05:15:01 C 05 50 22.37 +30 48 54.1 18.1 d H72
2004-01-24 05:20:11 C 05 50 22.62 +30 48 52.9 18.2 d H72
2004-01-24 19:41:19 C 05 51 10.71 +30 47 56.9 o 084
2004-01-30 19:16:44 C 05 59 22.24 +30 37 43.3 r 106
2004-01-30 19:23:48 C 05 59 22.62 +30 37 42.6 r 106
2004-01-30 19:30:56 C 05 59 23.04 +30 37 41.7 r 106
2004-02-14 03:57:15 C 06 21 02.20 +29 58 16.5 19.2 c 704
2004-02-14 04:14:20 C 06 21 03.33 +29 58 12.3 19.5 c 704
2004-02-14 04:48:38 C 06 21 05.59 +29 58 08.2 19.8 c 704
2004-02-20 19:31:23 C 06 31 53.70 +29 34 18.2 r 240
2004-02-20 19:34:30 C 06 31 53.94 +29 34 17.8 r 240
2004-02-20 19:42:15 C 06 31 54.54 +29 34 16.7 r 240
2004-02-20 19:45:21 C 06 31 54.75 +29 34 16.1 r 240
2006-01-24 01:58:48 C 01 24 43.30 +09 47 15.2 c 699
2006-01-24 02:14:30 C 01 24 46.12 +09 47 34.5 c 699
2006-01-24 02:30:17 C 01 24 48.94 +09 47 57.7 c 699
2006-01-24 02:46:00 C 01 24 51.88 +09 48 19.2 c 699
2006-02-03 02:21:46 C 02 09 09.86 +14 41 26.0 r G96
2006-02-03 02:31:05 C 02 09 11.52 +14 41 36.9 r G96
2006-02-03 02:40:33 C 02 09 13.24 +14 41 47.4 r G96
2006-02-03 02:49:50 C 02 09 14.90 +14 41 57.9 r G96
2006-03-04 02:34:59 C 04 11 26.80 +23 59 16.3 r G96
2006-03-04 02:43:23 C 04 11 28.17 +23 59 20.5 r G96
2006-03-04 02:51:48 C 04 11 29.54 +23 59 24.1 r G96
2006-03-04 03:00:07 C 04 11 30.91 +23 59 28.1 r G96
2009-04-27 08:36:47 C 16 03 32.47 -18 26 51.3 r G96
2009-04-27 08:44:44 C 16 03 32.07 -18 26 50.4 r G96
2009-04-27 08:52:33 C 16 03 31.71 -18 26 48.8 r G96
2009-04-27 09:00:29 C 16 03 31.32 -18 26 48.5 r G96
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)