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
2020-12-17 13:33:37 C 11 09 40.330 +10 05 30.71 X G37
2020-12-24 10:29:00 C 11 15 14.36 +10 05 03.7 V G96
2020-12-24 10:36:22 C 11 15 14.53 +10 05 04.0 V G96
2020-12-24 10:43:44 C 11 15 14.73 +10 05 03.7 V G96
2020-12-24 10:51:07 C 11 15 14.90 +10 05 04.6 V G96
2020-12-24 13:45:49 C 11 15 19.614 +10 05 14.27 U F52
2020-12-24 14:02:21 C 11 15 20.015 +10 05 15.02 U F52
2021-01-10 10:40:18 C 11 18 34.62 +11 10 17.8 V G96
2021-01-10 10:47:57 C 11 18 34.52 +11 10 20.0 V G96
2021-01-10 10:55:36 C 11 18 34.39 +11 10 22.1 V G96
2021-01-10 11:03:18 C 11 18 34.28 +11 10 24.3 V G96
2021-01-15 09:07:33 C 11 16 28.61 +11 47 27.6 V 703
2021-01-15 09:15:03 C 11 16 28.42 +11 47 30.0 V 703
2021-01-15 09:22:33 C 11 16 28.29 +11 47 32.7 V 703
2021-01-15 09:30:04 C 11 16 28.02 +11 47 33.3 V 703
2021-01-15 14:47:42 C 11 16 19.956 +11 49 28.22 U F52
2021-01-15 15:04:35 C 11 16 19.486 +11 49 34.08 U F52
2021-01-15 15:21:22 C 11 16 19.022 +11 49 39.89 U F52
2021-01-15 15:38:07 C 11 16 18.560 +11 49 45.66 U F52
2021-01-18 12:21:42 C 11 14 23.26 +12 14 56.9 V G96
2021-01-18 12:29:09 C 11 14 23.00 +12 14 59.8 V G96
2021-01-18 12:36:36 C 11 14 22.74 +12 15 02.6 V G96
2021-01-18 12:44:03 C 11 14 22.48 +12 15 05.5 V G96
2021-01-20 00:29:27 C 11 13 12.173 +12 29 07.07 X Z19
2021-01-20 00:31:06 C 11 13 12.112 +12 29 07.73 X Z19
2021-01-20 00:33:07 C 11 13 12.039 +12 29 08.56 X Z19
2021-01-20 00:34:46 C 11 13 11.979 +12 29 09.22 X Z19
2021-01-20 00:36:25 C 11 13 11.917 +12 29 09.90 X Z19
2021-01-20 00:38:04 C 11 13 11.858 +12 29 10.56 X Z19
2021-01-20 00:39:43 C 11 13 11.795 +12 29 11.26 X Z19
2021-01-20 00:41:22 C 11 13 11.734 +12 29 11.95 X Z19
2021-01-20 00:43:01 C 11 13 11.674 +12 29 12.60 X Z19
2021-01-20 00:44:40 C 11 13 11.615 +12 29 13.25 X Z19
2021-01-20 00:46:19 C 11 13 11.553 +12 29 13.95 X Z19
2021-01-20 00:47:59 C 11 13 11.493 +12 29 14.63 X Z19
2021-01-20 00:50:01 C 11 13 11.416 +12 29 15.46 X Z19
2021-01-20 00:51:40 C 11 13 11.355 +12 29 16.13 X Z19
2021-01-20 00:53:19 C 11 13 11.293 +12 29 16.81 X Z19
2021-01-20 00:54:58 C 11 13 11.232 +12 29 17.49 X Z19
2021-01-20 00:56:37 C 11 13 11.171 +12 29 18.16 X Z19
2021-01-20 01:03:13 C 11 13 10.929 +12 29 20.84 X Z19
2021-01-20 01:04:52 C 11 13 10.866 +12 29 21.53 X Z19
2021-01-20 01:06:46 C 11 13 10.796 +12 29 22.30 X Z19
2021-01-20 01:09:04 C 11 13 10.710 +12 29 23.25 X Z19
2021-01-20 01:12:31 C 11 13 10.584 +12 29 24.63 X Z19
2021-01-20 01:14:50 C 11 13 10.498 +12 29 25.57 X Z19
2021-01-20 01:15:59 C 11 13 10.450 +12 29 26.09 X Z19
2021-01-20 01:17:08 C 11 13 10.411 +12 29 26.53 X Z19
2021-01-20 01:18:17 C 11 13 10.366 +12 29 27.01 X Z19
2021-01-20 01:19:25 C 11 13 10.324 +12 29 27.48 X Z19
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)