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
2015-04-13 07:44:05 C 13 16 27.779 -02 48 22.86 X G37
2015-04-13 07:47:21 C 13 16 27.590 -02 48 21.89 X G37
2015-04-13 07:50:35 C 13 16 27.398 -02 48 20.94 X G37
2015-04-13 07:53:48 C 13 16 27.206 -02 48 19.93 X G37
2015-04-13 07:57:02 C 13 16 27.015 -02 48 18.94 X G37
2015-04-13 08:00:15 C 13 16 26.816 -02 48 17.96 X G37
2015-04-13 08:03:29 C 13 16 26.620 -02 48 16.99 X G37
2015-04-13 08:19:38 C 13 16 25.652 -02 48 12.08 X G37
2015-04-13 08:22:52 C 13 16 25.463 -02 48 11.12 X G37
2015-04-13 08:26:05 C 13 16 25.266 -02 48 10.12 X G37
2015-04-13 08:29:19 C 13 16 25.071 -02 48 09.15 X G37
2015-04-13 08:32:32 C 13 16 24.880 -02 48 08.18 X G37
2015-04-13 08:35:46 C 13 16 24.685 -02 48 07.20 X G37
2015-04-13 08:39:00 C 13 16 24.492 -02 48 06.23 X G37
2015-04-13 09:08:03 C 13 16 22.748 -02 47 57.37 X G37
2015-04-13 09:30:40 C 13 16 21.403 -02 47 50.53 X G37
2015-04-13 09:33:53 C 13 16 21.209 -02 47 49.62 X G37
2015-04-13 09:37:07 C 13 16 21.011 -02 47 48.60 X G37
2015-04-13 09:40:20 C 13 16 20.820 -02 47 47.65 X G37
2015-04-13 09:43:34 C 13 16 20.632 -02 47 46.69 X G37
2015-04-13 09:46:47 C 13 16 20.439 -02 47 45.71 X G37
2015-04-13 09:50:01 C 13 16 20.244 -02 47 44.68 X G37
2015-04-13 09:53:14 C 13 16 20.046 -02 47 43.67 X G37
2015-04-20 10:03:26 C 13 06 46.391 -01 59 38.38 V F51
2015-04-20 16:20:36 C 13 06 25.71 -01 58 00.1 q D29
2015-04-20 16:40:55 C 13 06 24.49 -01 57 54.1 q D29
2015-04-20 17:01:14 C 13 06 23.40 -01 57 48.7 q D29
2015-04-21 09:38:06 C 13 05 29.313 -01 53 26.81 V F51
2015-04-21 09:57:37 C 13 05 28.212 -01 53 21.51 V F51
2015-04-21 10:17:09 C 13 05 27.123 -01 53 16.46 V F51
2015-04-21 10:36:40 C 13 05 26.027 -01 53 11.32 V F51
2015-04-26 07:27:31 C 12 59 21.835 -01 24 56.22 V F51
2015-04-26 07:44:53 C 12 59 20.957 -01 24 52.08 V F51
2015-05-12 04:17:44 C 12 44 04.53 -00 25 59.8 q G96
2015-05-12 04:24:18 C 12 44 04.36 -00 25 58.8 q G96
2015-05-12 04:30:55 C 12 44 04.08 -00 25 59.4 q G96
2015-05-12 04:37:30 C 12 44 03.95 -00 25 57.9 q G96
2015-05-21 06:27:55 C 12 39 00.811 -00 16 48.86 V F51
2015-05-21 06:48:31 C 12 39 00.438 -00 16 48.76 V F51
2015-05-21 07:09:11 C 12 39 00.056 -00 16 48.64 V F51
2015-05-23 06:33:24 C 12 38 16.517 -00 17 09.12 V F51
2015-05-23 06:50:50 C 12 38 16.255 -00 17 09.61 V F51
2015-05-23 07:08:14 C 12 38 15.978 -00 17 09.69 V F51
2015-05-23 07:25:37 C 12 38 15.717 -00 17 10.13 V F51
2015-06-09 01:40:49 C 12 37 06.12 -00 49 45.9 L 309
2015-06-09 01:47:34 C 12 37 06.16 -00 49 46.8 L 309
2015-06-09 01:54:19 C 12 37 06.20 -00 49 47.7 L 309
2015-06-09 02:01:04 C 12 37 06.25 -00 49 48.7 L 309
2015-06-09 02:07:49 C 12 37 06.29 -00 49 49.6 L 309
2017-01-30 13:59:51 C 13 19 10.600 -03 12 05.01 V F51
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)