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 00:51:52 C 11 10 38.142 +11 40 33.42 X 309
2019-04-07 00:53:14 C 11 10 38.092 +11 40 33.59 X 309
2019-04-07 00:54:38 C 11 10 38.035 +11 40 33.70 X 309
2019-04-07 01:04:38 C 11 10 37.648 +11 40 34.76 X 309
2019-04-07 01:06:08 C 11 10 37.590 +11 40 34.91 X 309
2019-04-07 01:07:38 C 11 10 37.533 +11 40 35.09 X 309
2019-04-07 01:09:05 C 11 10 37.476 +11 40 35.22 X 309
2019-04-07 01:10:29 C 11 10 37.422 +11 40 35.39 X 309
2019-04-07 01:11:59 C 11 10 37.364 +11 40 35.53 X 309
2019-04-07 01:13:24 C 11 10 37.310 +11 40 35.66 X 309
2019-04-07 01:22:59 C 11 10 36.941 +11 40 36.66 X 309
2019-04-07 01:24:21 C 11 10 36.884 +11 40 36.81 X 309
2019-04-07 01:25:45 C 11 10 36.831 +11 40 36.96 X 309
2019-04-07 01:27:11 C 11 10 36.776 +11 40 37.11 X 309
2019-04-07 01:28:39 C 11 10 36.719 +11 40 37.28 X 309
2019-04-07 01:30:09 C 11 10 36.662 +11 40 37.40 X 309
2019-04-07 01:31:32 C 11 10 36.607 +11 40 37.57 X 309
2019-04-07 01:32:56 C 11 10 36.553 +11 40 37.68 X 309
2019-04-07 01:34:28 C 11 10 36.496 +11 40 37.84 X 309
2019-04-07 01:35:56 C 11 10 36.437 +11 40 38.00 X 309
2019-04-07 01:37:25 C 11 10 36.380 +11 40 38.17 X 309
2019-04-07 01:38:52 C 11 10 36.325 +11 40 38.31 X 309
2019-04-07 01:40:22 C 11 10 36.266 +11 40 38.48 X 309
2019-04-07 01:41:45 C 11 10 36.213 +11 40 38.61 X 309
2019-04-07 01:43:08 C 11 10 36.158 +11 40 38.74 X 309
2019-04-07 01:44:32 C 11 10 36.105 +11 40 38.86 X 309
2019-04-07 01:47:19 C 11 10 35.996 +11 40 39.18 X 309
2019-04-07 01:48:42 C 11 10 35.944 +11 40 39.31 X 309
2019-04-07 01:50:12 C 11 10 35.885 +11 40 39.48 X 309
2019-04-07 01:51:37 C 11 10 35.830 +11 40 39.61 X 309
2019-04-07 01:54:25 C 11 10 35.721 +11 40 39.89 X 309
2019-04-07 01:55:49 C 11 10 35.668 +11 40 40.04 X 309
2019-04-07 01:57:13 C 11 10 35.615 +11 40 40.19 X 309
2019-04-07 01:58:38 C 11 10 35.558 +11 40 40.32 X 309
2019-04-07 02:00:12 C 11 10 35.497 +11 40 40.48 X 309
2019-04-07 02:01:36 C 11 10 35.445 +11 40 40.61 X 309
2019-04-07 02:02:59 C 11 10 35.390 +11 40 40.76 X 309
2019-04-07 02:04:23 C 11 10 35.335 +11 40 40.89 X 309
2019-04-07 02:05:46 C 11 10 35.280 +11 40 41.04 X 309
2019-04-07 02:07:10 C 11 10 35.228 +11 40 41.19 X 309
2019-04-07 02:08:35 C 11 10 35.172 +11 40 41.32 X 309
2019-04-07 02:10:10 C 11 10 35.114 +11 40 41.52 X 309
2019-04-07 02:11:33 C 11 10 35.059 +11 40 41.64 X 309
2019-04-07 02:17:30 C 11 10 34.828 +11 40 42.23 X 309
2019-04-07 02:18:47 C 11 10 34.779 +11 40 42.36 X 309
2019-04-07 02:20:03 C 11 10 34.729 +11 40 42.51 X 309
2019-04-07 03:35:34 C 11 10 31.806 +11 40 50.06 X 309
2019-04-07 03:36:51 C 11 10 31.757 +11 40 50.19 X 309
2019-04-07 03:38:08 C 11 10 31.707 +11 40 50.31 X 309
2019-04-07 03:39:32 C 11 10 31.652 +11 40 50.45 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)