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
2022-08-10 05:20:47 C 23 05 30.247 -22 54 09.18 V W68
2022-08-16 01:15:44 C 23 16 57.389 -24 27 43.45 V M22
2022-08-16 01:24:41 C 23 16 58.046 -24 27 49.79 V M22
2022-08-16 01:33:18 C 23 16 58.718 -24 27 55.69 V M22
2022-08-16 01:47:38 C 23 16 59.837 -24 28 06.02 V M22
2022-08-16 12:25:55 C 23 17 57.165 -24 36 27.14 U F52
2022-08-16 12:38:45 C 23 17 58.152 -24 36 36.30 U F52
2022-08-16 12:51:35 C 23 17 59.155 -24 36 45.56 U F52
2022-08-16 13:04:35 C 23 18 00.158 -24 36 54.96 U F52
2022-08-16 23:36:45 C 23 18 58.116 -24 44 08.99 V M22
2022-08-16 23:40:04 C 23 18 58.378 -24 44 11.54 V M22
2022-08-16 23:43:58 C 23 18 58.680 -24 44 14.50 V M22
2022-08-17 00:04:24 C 23 19 00.312 -24 44 29.80 V M22
2022-08-20 02:18:05 C 23 26 04.24 -25 41 52.8 q 834
2022-08-20 03:09:42 C 23 26 08.92 -25 42 36.7 q 834
2022-08-21 00:29:04 C 23 28 16.243 -26 00 01.44 V M22
2022-08-21 00:33:39 C 23 28 16.658 -26 00 05.00 V M22
2022-08-21 00:42:51 C 23 28 17.482 -26 00 12.56 V M22
2022-08-21 01:33:44 C 23 28 22.094 -26 00 53.42 V M22
2022-08-21 11:43:23 C 23 29 26.255 -26 09 56.12 V T12
2022-08-22 04:39:26 C 23 31 14.352 -26 23 29.00 V W68
2022-08-22 04:42:01 C 23 31 14.587 -26 23 31.34 V W68
2022-08-22 04:46:36 C 23 31 15.038 -26 23 35.38 V W68
2022-08-22 04:55:27 C 23 31 15.869 -26 23 43.15 V W68
2022-08-22 15:45:54 C 23 32 24.61 -26 32 52.7 q Q68
2022-08-22 15:48:02 C 23 32 24.81 -26 32 54.4 q Q68
2022-08-22 15:50:10 C 23 32 25.01 -26 32 56.2 q Q68
2022-08-22 15:52:18 C 23 32 25.21 -26 32 58.0 q Q68
2022-08-22 16:07:16 C 23 32 26.67 -26 33 10.7 q Q68
2022-08-22 16:09:24 C 23 32 26.86 -26 33 12.4 q Q68
2022-08-22 16:11:31 C 23 32 27.04 -26 33 14.1 q Q68
2022-08-22 16:13:40 C 23 32 27.27 -26 33 16.0 q Q68
2022-08-23 06:12:15 C 23 33 59.791 -26 45 18.36 V W68
2022-08-23 06:17:12 C 23 34 00.269 -26 45 22.72 V W68
2022-08-23 06:26:20 C 23 34 01.152 -26 45 30.56 V W68
2022-08-23 07:01:41 C 23 34 04.606 -26 46 00.66 V W68
2022-08-24 00:14:04 C 23 36 01.214 -27 00 57.20 V M22
2022-08-24 00:18:03 C 23 36 01.613 -27 01 00.66 V M22
2022-08-24 00:26:18 C 23 36 02.441 -27 01 07.82 V M22
2022-08-24 01:10:51 C 23 36 06.934 -27 01 46.24 V M22
2022-08-24 15:46:39 C 23 37 48.63 -27 14 37.6 q Q68
2022-08-24 15:48:46 C 23 37 48.82 -27 14 39.0 q Q68
2022-08-24 15:50:53 C 23 37 49.07 -27 14 41.0 q Q68
2022-08-24 15:53:01 C 23 37 49.29 -27 14 42.9 q Q68
2022-08-24 16:07:45 C 23 37 50.81 -27 14 55.8 q Q68
2022-08-24 16:09:52 C 23 37 51.03 -27 14 57.6 q Q68
2022-08-24 16:12:00 C 23 37 51.25 -27 14 59.6 q Q68
2022-08-26 06:46:49 C 23 42 30.557 -27 49 45.62 V W68
2022-08-26 06:51:25 C 23 42 31.058 -27 49 49.84 V W68
2022-08-26 07:00:35 C 23 42 32.071 -27 49 58.04 V W68
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)