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
2019-04-06 04:35:00 C 11 11 23.308 +11 38 24.53 X 309
2019-04-06 04:36:16 C 11 11 23.253 +11 38 24.67 X 309
2019-04-06 04:37:38 C 11 11 23.203 +11 38 24.87 X 309
2019-04-06 04:38:54 C 11 11 23.153 +11 38 24.98 X 309
2019-04-06 04:40:10 C 11 11 23.103 +11 38 25.12 X 309
2019-04-06 04:41:27 C 11 11 23.049 +11 38 25.27 X 309
2019-04-06 04:42:44 C 11 11 22.997 +11 38 25.42 X 309
2019-04-06 04:44:00 C 11 11 22.947 +11 38 25.53 X 309
2019-04-06 04:45:17 C 11 11 22.897 +11 38 25.67 X 309
2019-04-06 04:46:40 C 11 11 22.841 +11 38 25.81 X 309
2019-04-06 04:47:56 C 11 11 22.791 +11 38 25.96 X 309
2019-04-06 04:49:12 C 11 11 22.740 +11 38 26.07 X 309
2019-04-06 04:50:28 C 11 11 22.690 +11 38 26.23 X 309
2019-04-06 04:51:44 C 11 11 22.639 +11 38 26.39 X 309
2019-04-06 04:53:00 C 11 11 22.586 +11 38 26.51 X 309
2019-04-06 04:54:17 C 11 11 22.537 +11 38 26.66 X 309
2019-04-06 04:55:39 C 11 11 22.483 +11 38 26.76 X 309
2019-04-06 04:56:55 C 11 11 22.432 +11 38 26.92 X 309
2019-04-06 05:00:44 C 11 11 22.278 +11 38 27.33 X 309
2019-04-06 05:02:00 C 11 11 22.231 +11 38 27.47 X 309
2019-04-06 05:03:16 C 11 11 22.180 +11 38 27.64 X 309
2019-04-06 05:04:38 C 11 11 22.125 +11 38 27.72 X 309
2019-04-06 05:05:55 C 11 11 22.072 +11 38 27.87 X 309
2019-04-06 05:07:11 C 11 11 22.021 +11 38 28.04 X 309
2019-04-06 05:08:27 C 11 11 21.972 +11 38 28.16 X 309
2019-04-06 05:09:43 C 11 11 21.923 +11 38 28.29 X 309
2019-04-06 05:10:59 C 11 11 21.873 +11 38 28.43 X 309
2019-04-06 05:12:15 C 11 11 21.820 +11 38 28.56 X 309
2019-04-06 05:13:37 C 11 11 21.769 +11 38 28.75 X 309
2019-04-06 05:14:54 C 11 11 21.717 +11 38 28.87 X 309
2019-04-06 05:16:10 C 11 11 21.665 +11 38 29.02 X 309
2019-04-06 05:17:26 C 11 11 21.613 +11 38 29.15 X 309
2019-04-06 05:18:42 C 11 11 21.565 +11 38 29.28 X 309
2019-04-06 05:19:58 C 11 11 21.516 +11 38 29.40 X 309
2019-04-06 05:21:14 C 11 11 21.465 +11 38 29.58 X 309
2019-04-06 05:22:36 C 11 11 21.409 +11 38 29.69 X 309
2019-04-06 05:23:52 C 11 11 21.361 +11 38 29.84 X 309
2019-04-06 05:25:08 C 11 11 21.311 +11 38 29.98 X 309
2019-04-06 05:27:03 C 11 11 21.229 +11 38 30.20 X 309
2019-04-06 05:29:17 C 11 11 21.146 +11 38 30.43 X 309
2019-04-06 05:31:14 C 11 11 21.066 +11 38 30.60 X 309
2019-04-06 05:33:10 C 11 11 20.988 +11 38 30.85 X 309
2019-04-06 05:35:40 C 11 11 20.891 +11 38 31.10 X 309
2019-04-06 05:37:37 C 11 11 20.812 +11 38 31.30 X 309
2019-04-06 05:42:51 C 11 11 20.605 +11 38 31.86 X 309
2019-04-06 05:45:51 C 11 11 20.485 +11 38 32.20 X 309
2019-04-06 05:47:47 C 11 11 20.412 +11 38 32.37 X 309
2019-04-06 05:49:43 C 11 11 20.334 +11 38 32.61 X 309
2019-04-06 05:51:39 C 11 11 20.259 +11 38 32.80 X 309
2019-04-06 05:53:35 C 11 11 20.181 +11 38 32.99 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)