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
2003-12-22 07:05:32 C 05 10 53.28 +28 52 26.1 15.5 c 704
2003-12-22 07:24:49 C 05 10 54.25 +28 52 39.0 17.8 c 704
2003-12-22 07:43:50 C 05 10 55.00 +28 52 45.6 15.5 c 704
2003-12-23 13:17:57 C 05 12 34.71 +29 08 17.5 15.3 r D85
2003-12-23 13:23:00 C 05 12 34.92 +29 08 19.8 15.2 r D85
2003-12-23 13:27:47 C 05 12 35.13 +29 08 22.2 15.3 r D85
2003-12-23 23:31:54 C 05 13 07.50 +29 12 11.3 r 938
2003-12-23 23:34:54 C 05 13 07.64 +29 12 12.7 r 938
2003-12-23 23:37:53 C 05 13 07.76 +29 12 14.3 r 938
2003-12-24 01:14:21 C 05 13 11.31 +29 12 45.2 c 113
2003-12-24 01:15:40 C 05 13 11.42 +29 12 44.5 c A43
2003-12-24 01:17:32 C 05 13 11.45 +29 12 46.4 c 113
2003-12-24 01:19:07 C 05 13 11.52 +29 12 47.2 c 113
2003-12-24 01:20:42 C 05 13 11.58 +29 12 47.8 c 113
2003-12-24 01:21:30 C 05 13 11.70 +29 12 47.0 c A43
2003-12-24 01:22:17 C 05 13 11.67 +29 12 48.3 c 113
2003-12-24 01:26:27 C 05 13 11.93 +29 12 49.3 c A43
2003-12-24 01:32:00 C 05 13 12.19 +29 12 51.3 c A43
2003-12-24 01:38:33 C 05 13 12.48 +29 12 53.8 c A43
2003-12-24 01:45:21 C 05 13 12.84 +29 12 56.9 c A43
2003-12-24 01:50:37 C 05 13 13.08 +29 12 58.7 c A43
2003-12-25 22:57:50 C 05 15 36.68 +29 32 10.8 r 203
2003-12-25 23:13:12 C 05 15 37.87 +29 32 20.6 r 458
2003-12-25 23:17:06 C 05 15 37.54 +29 32 18.2 r 203
2003-12-25 23:22:29 C 05 15 38.21 +29 32 24.5 r 458
2003-12-25 23:56:40 C 05 15 39.09 +29 32 32.4 r 203
2003-12-26 20:03:51 C 05 16 42.94 +29 40 05.1 c 434
2003-12-26 20:07:39 C 05 16 43.14 +29 40 06.7 c 434
2003-12-26 20:11:35 C 05 16 43.27 +29 40 08.0 c 434
2003-12-26 22:02:14 C 05 16 47.79 +29 40 49.3 A30
2003-12-26 22:07:14 C 05 16 47.98 +29 40 50.7 A30
2003-12-26 22:12:15 C 05 16 48.22 +29 40 52.9 A30
2003-12-27 19:32:38 C 05 17 54.06 +29 48 12.2 o A16
2003-12-27 19:41:07 C 05 17 54.44 +29 48 15.5 o A16
2003-12-27 19:47:27 C 05 17 54.68 +29 48 17.9 o A16
2003-12-27 19:53:45 C 05 17 54.96 +29 48 20.3 o A16
2003-12-28 00:51:36 C 05 18 10.75 +29 50 08.7 15.8 d H72
2003-12-28 00:56:17 C 05 18 10.95 +29 50 10.8 15.8 d H72
2003-12-28 01:00:57 C 05 18 11.10 +29 50 13.0 15.7 d H72
2003-12-28 01:05:37 C 05 18 11.33 +29 50 14.9 16.0 d H72
2003-12-28 03:54:30 C 05 18 17.80 +29 51 15.6 17.3 d H72
2003-12-28 03:56:39 C 05 18 17.89 +29 51 16.3 17.3 d H72
2003-12-28 03:58:50 C 05 18 17.93 +29 51 17.0 17.3 d H72
2003-12-28 04:00:59 C 05 18 18.05 +29 51 17.3 17.3 d H72
2003-12-28 06:24:12 C 05 18 24.58 +29 51 57.9 15.8 c 704
2003-12-28 06:42:51 C 05 18 25.36 +29 52 04.4 16.9 c 704
2003-12-28 07:01:38 C 05 18 26.01 +29 52 09.4 16.1 c 704
2003-12-28 07:20:21 C 05 18 26.78 +29 52 15.2 16.0 c 704
2003-12-28 07:39:57 C 05 18 27.48 +29 52 21.2 15.7 c 704
2003-12-28 21:09:19 C 05 19 09.00 +29 56 24.0 i 057
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)