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
2022-11-19 13:12:54 C 08 19 39.06 +15 51 35.0 V U55
2022-11-19 13:31:00 C 08 19 39.47 +15 51 54.7 V U55
2022-11-19 13:35:35 C 08 19 41.484 +15 52 26.44 V T05
2022-11-19 13:38:12 C 08 19 41.530 +15 52 29.42 V T05
2022-11-19 13:42:45 C 08 19 41.623 +15 52 34.50 V T05
2022-11-19 13:48:48 C 08 19 39.89 +15 52 14.1 V U55
2022-11-20 00:45:06 C 08 20 05.06 +16 04 14.9 V 619
2022-11-20 00:54:16 C 08 20 05.28 +16 04 25.2 V 619
2022-11-20 01:04:03 C 08 20 05.51 +16 04 36.3 V 619
2022-11-20 01:33:37 B 08 20 05.53 +16 05 03.5 q M18
2022-11-20 01:42:31 B 08 20 05.77 +16 05 13.3 q M18
2022-11-20 04:22:41 C 08 20 09.39 +16 08 15.1 q A77
2022-11-20 04:28:31 C 08 20 09.51 +16 08 21.4 q A77
2022-11-20 04:35:32 C 08 20 09.64 +16 08 28.9 q A77
2022-11-21 07:32:54 C 08 20 59.23 +16 37 33.7 X W62
2022-11-21 07:44:42 C 08 20 59.42 +16 37 46.5 X W62
2022-11-21 07:56:02 C 08 20 59.59 +16 37 58.9 X W62
2022-11-21 08:35:54 C 08 21 01.962 +16 38 45.67 V 703
2022-11-21 08:43:31 C 08 21 02.099 +16 38 54.17 V 703
2022-11-21 08:51:08 C 08 21 02.236 +16 39 02.66 V 703
2022-11-21 08:58:47 C 08 21 02.358 +16 39 11.23 V 703
2022-11-21 11:40:14 C 08 21 04.44 +16 42 07.5 U V16
2022-11-21 11:48:58 C 08 21 04.51 +16 42 16.5 U V16
2022-11-21 11:57:10 C 08 21 04.60 +16 42 25.5 U V16
2022-11-21 12:05:24 C 08 21 04.71 +16 42 34.1 U V16
2022-11-21 12:13:37 C 08 21 04.80 +16 42 42.7 U V16
2022-11-21 12:19:39 C 08 21 04.86 +16 42 49.0 U V16
2022-11-21 12:27:19 C 08 21 04.96 +16 42 57.2 U V16
2022-11-21 13:28:42 C 08 21 08.506 +16 44 14.06 V T08
2022-11-21 13:31:22 C 08 21 08.532 +16 44 16.98 V T08
2022-11-21 13:35:21 C 08 21 08.582 +16 44 21.34 V T08
2022-11-21 13:53:32 C 08 21 08.762 +16 44 41.14 V T08
2022-11-22 00:51:08 C 08 21 24.36 +16 56 15.4 q M47
2022-11-22 00:55:23 C 08 21 24.41 +16 56 19.8 q M47
2022-11-22 00:59:38 C 08 21 24.45 +16 56 25.2 q M47
2022-11-22 01:01:47 C 08 21 24.46 +16 56 26.3 q M47
2022-11-22 01:03:56 C 08 21 24.52 +16 56 27.7 q M47
2022-11-22 01:08:11 C 08 21 24.54 +16 56 32.5 q M47
2022-11-22 01:12:26 C 08 21 24.55 +16 56 37.7 q M47
2022-11-22 11:27:28 C 08 21 39.56 +17 07 18.4 U V16
2022-11-22 11:35:45 C 08 21 39.61 +17 07 26.8 U V16
2022-11-22 11:44:32 C 08 21 39.68 +17 07 36.2 U V16
2022-11-22 11:52:53 C 08 21 39.95 +17 07 45.0 U V16
2022-11-22 12:01:09 C 08 21 39.89 +17 07 52.5 U V16
2022-11-22 12:09:29 C 08 21 39.84 +17 08 01.8 U V16
2022-11-22 12:22:12 C 08 21 40.02 +17 08 15.8 U V16
2022-11-22 12:27:11 C 08 21 40.08 +17 08 20.8 U V16
2022-11-23 13:13:22 C 08 22 12.262 +17 34 21.11 V T05
2022-11-23 13:16:14 C 08 22 12.264 +17 34 24.17 V T05
2022-11-23 13:32:27 C 08 22 12.319 +17 34 41.27 V T05
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)