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
2017-03-18 10:46:36 C 12 48 58.27 +01 08 23.5 q G96
2017-03-20 08:14:30 C 12 46 20.010 +01 25 03.44 V F51
2017-03-20 08:31:30 C 12 46 18.984 +01 25 09.61 V F51
2017-03-20 08:48:37 C 12 46 17.954 +01 25 15.91 V F51
2017-03-20 09:05:40 C 12 46 16.923 +01 25 22.22 V F51
2017-03-26 08:52:09 C 12 37 41.25 +02 17 08.3 q G96
2017-03-26 08:58:18 C 12 37 40.86 +02 17 10.9 q G96
2017-03-26 09:06:13 C 12 37 40.38 +02 17 13.3 q G96
2017-03-26 09:12:22 C 12 37 40.01 +02 17 15.4 q G96
2017-03-29 09:27:24 C 12 33 19.618 +02 42 12.74 V F51
2017-03-29 09:45:05 C 12 33 18.526 +02 42 18.75 V F51
2017-03-29 10:02:49 C 12 33 17.427 +02 42 24.74 V F51
2017-03-29 10:22:23 C 12 33 16.219 +02 42 31.33 V F51
2017-04-03 08:09:20 C 12 26 19.25 +03 20 31.6 q G96
2017-04-03 08:15:31 C 12 26 18.88 +03 20 32.8 q G96
2017-04-03 08:27:50 C 12 26 18.16 +03 20 36.6 q G96
2017-04-03 11:04:36 C 12 26 09.124 +03 21 26.22 V F51
2017-04-03 12:04:44 C 12 26 05.542 +03 21 44.51 V F51
2017-04-15 05:53:07 C 12 11 14.72 +04 33 41.0 q G96
2017-04-15 05:59:21 C 12 11 14.40 +04 33 42.1 q G96
2017-04-15 06:05:30 C 12 11 14.14 +04 33 43.2 q G96
2017-04-15 06:11:40 C 12 11 13.84 +04 33 45.1 q G96
2017-04-16 07:14:56 C 12 10 05.046 +04 38 39.37 V F51
2017-04-16 07:32:22 C 12 10 04.228 +04 38 42.67 V F51
2017-04-16 07:49:42 C 12 10 03.410 +04 38 45.98 V F51
2017-04-16 08:07:06 C 12 10 02.591 +04 38 49.34 V F51
2017-04-18 07:00:05 C 12 07 58.750 +04 47 13.59 X G37
2017-04-18 07:02:18 C 12 07 58.650 +04 47 14.00 X G37
2017-04-18 07:04:32 C 12 07 58.549 +04 47 14.38 X G37
2017-04-18 07:06:46 C 12 07 58.449 +04 47 14.76 X G37
2017-04-18 07:08:59 C 12 07 58.350 +04 47 15.13 X G37
2017-04-18 07:11:13 C 12 07 58.253 +04 47 15.50 X G37
2017-04-18 07:13:26 C 12 07 58.154 +04 47 15.87 X G37
2017-04-18 07:15:40 C 12 07 58.054 +04 47 16.27 X G37
2017-04-18 07:17:53 C 12 07 57.961 +04 47 16.61 X G37
2017-04-18 07:20:07 C 12 07 57.862 +04 47 16.99 X G37
2017-04-18 07:22:22 C 12 07 57.762 +04 47 17.39 X G37
2017-04-18 07:24:36 C 12 07 57.658 +04 47 17.77 X G37
2017-04-18 07:26:50 C 12 07 57.563 +04 47 18.14 X G37
2017-04-18 07:29:03 C 12 07 57.466 +04 47 18.51 X G37
2017-04-18 07:31:17 C 12 07 57.365 +04 47 18.88 X G37
2017-04-18 07:33:30 C 12 07 57.270 +04 47 19.28 X G37
2017-04-18 07:35:44 C 12 07 57.167 +04 47 19.66 X G37
2017-04-18 07:37:57 C 12 07 57.070 +04 47 20.01 X G37
2017-04-18 07:40:11 C 12 07 56.972 +04 47 20.41 X G37
2017-04-18 07:42:24 C 12 07 56.875 +04 47 20.77 X G37
2017-04-18 07:44:40 C 12 07 56.774 +04 47 21.17 X G37
2017-04-18 07:46:53 C 12 07 56.675 +04 47 21.53 X G37
2017-04-18 07:49:07 C 12 07 56.577 +04 47 21.91 X G37
2017-04-18 07:51:21 C 12 07 56.483 +04 47 22.28 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)