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
2019-04-07 03:40:49 C 11 10 31.603 +11 40 50.57 X 309
2019-04-07 03:42:06 C 11 10 31.554 +11 40 50.70 X 309
2019-04-07 03:43:23 C 11 10 31.504 +11 40 50.82 X 309
2019-04-07 03:44:40 C 11 10 31.455 +11 40 50.96 X 309
2019-04-07 03:45:57 C 11 10 31.405 +11 40 51.08 X 309
2019-04-07 03:47:14 C 11 10 31.355 +11 40 51.20 X 309
2019-04-07 03:49:56 C 11 10 31.252 +11 40 51.46 X 309
2019-04-07 03:51:13 C 11 10 31.202 +11 40 51.59 X 309
2019-04-07 03:52:30 C 11 10 31.152 +11 40 51.72 X 309
2019-04-07 03:53:47 C 11 10 31.103 +11 40 51.84 X 309
2019-04-07 03:55:04 C 11 10 31.053 +11 40 51.97 X 309
2019-04-07 03:56:21 C 11 10 31.003 +11 40 52.09 X 309
2019-04-07 03:57:45 C 11 10 30.949 +11 40 52.24 X 309
2019-04-07 03:59:02 C 11 10 30.901 +11 40 52.36 X 309
2019-04-07 04:00:19 C 11 10 30.851 +11 40 52.49 X 309
2019-04-07 04:01:36 C 11 10 30.802 +11 40 52.62 X 309
2019-04-07 04:02:53 C 11 10 30.751 +11 40 52.75 X 309
2019-04-07 04:04:10 C 11 10 30.702 +11 40 52.87 X 309
2019-04-07 04:05:27 C 11 10 30.653 +11 40 53.00 X 309
2019-04-07 04:06:51 C 11 10 30.598 +11 40 53.13 X 309
2019-04-07 04:08:08 C 11 10 30.549 +11 40 53.25 X 309
2019-04-07 04:09:25 C 11 10 30.499 +11 40 53.39 X 309
2019-04-07 04:10:42 C 11 10 30.450 +11 40 53.51 X 309
2019-04-07 04:11:59 C 11 10 30.401 +11 40 53.63 X 309
2019-04-07 04:13:16 C 11 10 30.351 +11 40 53.76 X 309
2019-04-07 04:14:34 C 11 10 30.302 +11 40 53.88 X 309
2019-04-07 04:16:00 C 11 10 30.246 +11 40 54.03 X 309
2019-04-07 04:17:17 C 11 10 30.197 +11 40 54.14 X 309
2019-04-07 04:18:34 C 11 10 30.147 +11 40 54.27 X 309
2019-04-07 04:19:52 C 11 10 30.097 +11 40 54.40 X 309
2019-04-07 04:21:09 C 11 10 30.048 +11 40 54.52 X 309
2019-04-07 04:22:27 C 11 10 29.999 +11 40 54.66 X 309
2019-04-07 04:23:44 C 11 10 29.948 +11 40 54.77 X 309
2019-04-07 04:25:09 C 11 10 29.894 +11 40 54.92 X 309
2019-04-07 04:26:26 C 11 10 29.845 +11 40 55.04 X 309
2019-04-07 04:27:44 C 11 10 29.795 +11 40 55.16 X 309
2019-04-07 04:29:02 C 11 10 29.747 +11 40 55.29 X 309
2019-04-07 04:30:19 C 11 10 29.696 +11 40 55.41 X 309
2019-04-07 04:31:36 C 11 10 29.647 +11 40 55.54 X 309
2019-04-07 04:32:53 C 11 10 29.597 +11 40 55.67 X 309
2019-04-07 04:34:17 C 11 10 29.544 +11 40 55.80 X 309
2019-04-07 04:35:34 C 11 10 29.495 +11 40 55.91 X 309
2019-04-07 04:36:51 C 11 10 29.445 +11 40 56.05 X 309
2019-04-07 04:38:09 C 11 10 29.396 +11 40 56.17 X 309
2019-04-07 04:39:26 C 11 10 29.345 +11 40 56.29 X 309
2019-04-07 04:40:43 C 11 10 29.297 +11 40 56.42 X 309
2019-04-07 04:42:00 C 11 10 29.248 +11 40 56.53 X 309
2019-04-07 04:43:24 C 11 10 29.194 +11 40 56.67 X 309
2019-04-07 04:44:41 C 11 10 29.145 +11 40 56.80 X 309
2019-04-07 04:45:58 C 11 10 29.095 +11 40 56.93 X 309
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)