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
2021-02-17 04:31:19 C 10 32 31.037 +17 36 39.45 X G37
2021-02-17 04:34:28 C 10 32 30.793 +17 36 40.79 X G37
2021-02-17 04:37:36 C 10 32 30.567 +17 36 42.06 X G37
2021-02-17 04:40:45 C 10 32 30.324 +17 36 43.39 X G37
2021-02-17 05:08:24 C 10 32 28.260 +17 36 54.69 X G37
2021-02-17 05:14:41 C 10 32 27.786 +17 36 57.30 X G37
2021-02-17 05:17:50 C 10 32 27.549 +17 36 58.57 X G37
2021-02-17 05:20:58 C 10 32 27.313 +17 36 59.85 X G37
2021-02-17 05:24:07 C 10 32 27.076 +17 37 01.14 X G37
2021-02-17 05:27:15 C 10 32 26.840 +17 37 02.44 X G37
2021-02-17 05:30:24 C 10 32 26.604 +17 37 03.70 X G37
2021-02-17 05:33:34 C 10 32 26.361 +17 37 05.03 X G37
2021-02-17 05:36:43 C 10 32 26.127 +17 37 06.30 X G37
2021-02-17 05:39:52 C 10 32 25.891 +17 37 07.58 X G37
2021-02-17 05:40:42 C 10 32 25.90 +17 37 08.1 U I41
2021-02-17 05:43:00 C 10 32 25.659 +17 37 08.84 X G37
2021-02-17 06:05:00 C 10 32 23.999 +17 37 17.79 X G37
2021-02-17 06:08:08 C 10 32 23.756 +17 37 19.13 X G37
2021-02-17 06:11:19 C 10 32 23.520 +17 37 20.39 X G37
2021-02-17 06:30:10 C 10 32 22.092 +17 37 28.05 X G37
2021-02-17 06:36:27 C 10 32 21.616 +17 37 30.61 X G37
2021-02-17 06:42:44 C 10 32 21.142 +17 37 33.12 X G37
2021-02-17 06:49:26 C 10 32 20.634 +17 37 35.84 X G37
2021-02-17 07:21:54 C 10 32 18.16 +17 37 48.8 V 703
2021-02-17 07:26:07 C 10 32 17.93 +17 37 50.9 U I41
2021-02-17 07:34:50 C 10 32 17.187 +17 37 54.14 X G37
2021-02-17 07:37:59 C 10 32 16.951 +17 37 55.40 X G37
2021-02-17 07:38:24 C 10 32 16.90 +17 37 55.7 V 703
2021-02-17 07:46:39 C 10 32 16.34 +17 37 58.7 V 703
2021-02-17 07:51:47 C 10 32 15.99 +17 38 01.2 U I41
2021-02-17 07:54:57 C 10 32 15.660 +17 38 02.19 X G37
2021-02-17 07:58:06 C 10 32 15.421 +17 38 03.47 X G37
2021-02-17 08:04:40 C 10 32 14.924 +17 38 06.07 X G37
2021-02-17 08:10:57 C 10 32 14.449 +17 38 08.58 X G37
2021-02-17 08:17:14 C 10 32 13.972 +17 38 11.07 X G37
2021-02-17 08:29:48 C 10 32 13.012 +17 38 16.10 X G37
2021-02-17 08:33:06 C 10 32 12.760 +17 38 17.41 X G37
2021-02-17 08:35:32 C 10 32 12.65 +17 38 18.7 U I41
2021-02-17 08:55:06 C 10 32 11.098 +17 38 26.09 X G37
2021-02-17 08:58:14 C 10 32 10.854 +17 38 27.36 X G37
2021-02-17 09:01:23 C 10 32 10.619 +17 38 28.58 X G37
2021-02-17 09:04:34 C 10 32 10.372 +17 38 29.88 X G37
2021-02-17 09:07:43 C 10 32 10.138 +17 38 31.12 X G37
2021-02-17 09:10:51 C 10 32 09.895 +17 38 32.38 X G37
2021-02-17 09:23:25 C 10 32 08.944 +17 38 37.32 X G37
2021-02-17 09:26:34 C 10 32 08.707 +17 38 38.56 X G37
2021-02-17 09:29:42 C 10 32 08.467 +17 38 39.79 X G37
2021-02-17 09:32:51 C 10 32 08.226 +17 38 41.05 X G37
2021-02-17 09:36:02 C 10 32 07.989 +17 38 42.28 X G37
2021-02-17 09:39:10 C 10 32 07.751 +17 38 43.51 X G37
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)