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
2003-12-28 21:14:35 C 05 19 09.09 +29 56 28.6 15.2 i 057
2003-12-28 21:18:07 C 05 19 09.19 +29 56 29.5 15.6 i 057
2003-12-28 21:26:16 C 05 19 09.44 +29 56 32.5 15.2 i 057
2003-12-28 21:29:09 C 05 19 09.53 +29 56 33.2 15.1 i 057
2003-12-29 17:59:40 C 05 20 11.77 +30 02 23.4 o A16
2003-12-30 05:54:16 C 05 20 44.00 +30 05 54.8 c H41
2003-12-30 06:00:45 C 05 20 44.24 +30 05 56.8 c H41
2003-12-30 06:06:09 C 05 20 44.41 +30 05 58.6 c H41
2003-12-30 13:48:19 C 05 21 07.43 +30 08 39.9 15.2 r D85
2003-12-30 13:53:22 C 05 21 07.59 +30 08 41.8 15.3 r D85
2003-12-30 13:59:26 C 05 21 07.80 +30 08 42.9 15.0 r D85
2003-12-30 20:04:42 C 05 21 25.97 +30 09 21.8 o 084
2003-12-31 07:01:36 C 05 21 56.07 +30 12 20.0 c H41
2003-12-31 07:04:20 C 05 21 56.17 +30 12 20.8 c H41
2003-12-31 07:06:49 C 05 21 56.47 +30 12 23.4 c H41
2004-01-02 17:29:30 C 05 24 45.87 +30 24 47.5 o 084
2004-01-03 23:27:40 C 05 26 09.19 +30 30 13.0 o 084
2004-01-07 17:52:35 C 05 30 28.63 +30 42 38.7 o A16
2004-01-07 18:05:30 C 05 30 29.29 +30 42 37.7 o A16
2004-01-09 19:31:45 C 05 32 49.57 +30 47 10.2 o 084
2004-01-10 02:37:35 C 05 33 10.66 +30 47 53.8 c H41
2004-01-10 02:42:20 C 05 33 10.87 +30 47 54.2 c H41
2004-01-10 02:44:15 C 05 33 10.97 +30 47 54.7 c H41
2004-01-10 02:46:06 C 05 33 11.04 +30 47 55.2 c H41
2004-01-10 22:18:17 C 05 34 06.25 +30 49 11.0 c 204
2004-01-10 22:25:47 C 05 34 06.65 +30 49 11.3 c 204
2004-01-10 22:33:37 C 05 34 06.93 +30 49 11.5 c 204
2004-01-10 22:45:03 C 05 34 07.42 +30 49 12.6 c 204
2004-01-10 22:52:01 C 05 34 07.67 +30 49 12.6 c 204
2004-01-12 07:30:51 C 05 35 41.63 +30 51 02.7 c H41
2004-01-12 07:36:10 C 05 35 41.89 +30 51 02.9 c H41
2004-01-12 07:38:46 C 05 35 42.03 +30 51 02.9 c H41
2004-01-12 07:41:30 C 05 35 42.14 +30 51 02.9 c H41
2004-01-15 02:38:51 C 05 39 01.54 +30 53 14.2 c H41
2004-01-15 02:42:38 C 05 39 01.75 +30 53 14.7 c H41
2004-01-15 02:45:04 C 05 39 01.90 +30 53 15.5 c H41
2004-01-15 02:47:29 C 05 39 01.94 +30 53 15.5 c H41
2004-01-15 12:29:59 C 05 39 30.43 +30 53 51.2 r D85
2004-01-15 12:35:02 C 05 39 30.55 +30 53 50.7 r D85
2004-01-15 12:40:49 C 05 39 30.89 +30 53 50.6 r D85
2004-01-15 19:27:40 C 05 39 51.87 +30 53 24.3 r A16
2004-01-15 19:30:44 C 05 39 52.11 +30 53 24.3 r A16
2004-01-15 19:33:50 C 05 39 52.16 +30 53 24.3 r A16
2004-01-15 19:39:59 C 05 39 52.44 +30 53 24.3 r A16
2004-01-15 20:04:41 C 05 39 53.63 +30 53 24.1 r A16
2004-01-16 23:14:00 C 05 41 16.08 +30 53 33.0 c 830
2004-01-16 23:37:45 C 05 41 17.15 +30 53 35.0 c 830
2004-01-17 01:52:30 C 05 41 23.31 +30 53 37.6 o H88
2004-01-17 01:54:36 C 05 41 23.39 +30 53 37.4 o H88
2004-01-17 01:56:42 C 05 41 23.51 +30 53 37.8 o H88
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)