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
2023-02-25 18:40:34 B 07 21 03.798 +28 55 13.21 X B72
2023-03-15 21:50:02 C 07 41 24.50 +27 15 19.4 X C95
2023-03-15 22:21:58 C 07 41 26.10 +27 15 11.6 X C95
2023-03-18 05:31:29 C 07 44 29.792 +27 01 21.79 V G96
2023-03-18 05:39:42 C 07 44 30.264 +27 01 19.27 V G96
2023-03-18 05:47:56 C 07 44 30.714 +27 01 17.22 V G96
2023-03-18 05:56:10 C 07 44 31.146 +27 01 15.17 V G96
2023-03-23 06:45:39 C 07 51 31.286 +26 29 57.11 V T12
2023-03-23 06:47:46 C 07 51 31.402 +26 29 56.52 V T12
2023-03-23 07:06:51 C 07 51 32.485 +26 29 51.42 V T12
2023-03-23 07:54:28 C 07 51 35.202 +26 29 38.53 V T12
2023-03-23 08:02:57 C 07 51 35.692 +26 29 36.24 V T12
2023-03-23 08:36:47 C 07 51 37.629 +26 29 26.98 V T12
2023-03-23 08:50:34 C 07 51 38.414 +26 29 23.20 V T12
2023-03-23 09:43:01 C 07 51 41.441 +26 29 08.68 V T12
2023-03-23 09:49:22 C 07 51 41.808 +26 29 06.95 V T12
2023-03-23 10:09:28 C 07 51 42.983 +26 29 01.33 V T12
2023-03-24 20:42:06 C 07 53 47.57 +26 19 46.3 Z Y90
2023-03-24 20:52:41 C 07 53 48.23 +26 19 43.9 Z Y90
2023-03-24 21:01:44 C 07 53 48.79 +26 19 41.1 Z Y90
2023-04-27 03:41:33 C 08 46 39.239 +22 15 20.04 V H01
2023-04-27 03:49:01 C 08 46 39.747 +22 15 17.39 V H01
2023-04-27 04:03:12 C 08 46 40.724 +22 15 12.43 V H01
2023-05-08 03:11:28 C 09 05 11.505 +20 41 37.36 V H01
2023-05-08 03:22:31 C 09 05 12.272 +20 41 33.23 V H01
2023-05-08 03:33:25 C 09 05 13.037 +20 41 29.22 V H01
2023-05-08 03:41:00 C 09 05 13.551 +20 41 26.45 V H01
2023-05-10 05:42:09 C 09 08 45.835 +20 22 57.12 V H01
2023-05-10 06:01:37 C 09 08 47.210 +20 22 49.77 V H01
2023-05-10 06:15:31 C 09 08 48.185 +20 22 44.58 V H01
2023-05-10 06:27:57 C 09 08 49.056 +20 22 39.77 V H01
2023-05-22 05:56:50 C 09 29 14.113 +18 32 24.20 W T14
2023-05-22 05:59:34 C 09 29 14.308 +18 32 23.12 W T14
2023-06-12 06:09:29 C 10 05 02.752 +15 03 50.60 V T14
2023-06-12 06:12:13 C 10 05 02.945 +15 03 49.44 V T14
2024-05-05 15:13:09 S 19 00 49.498 -23 07 35.05 X 275
2024-08-13 12:18:14 S 17 20 10.213 -28 43 13.92 X 275
2024-09-06 05:53:15 C 17 32 32.266 -29 04 48.01 X F52
2024-09-06 06:05:38 C 17 32 32.856 -29 04 48.42 X F52
2024-09-06 06:18:01 C 17 32 33.462 -29 04 48.90 X F52
2024-09-06 06:30:29 C 17 32 34.053 -29 04 49.18 X F52
2024-09-22 02:22:35 S 17 58 46.180 -29 12 58.98 X 275
2024-12-17 10:46:55 C 23 05 12.84 -08 08 03.7 V D29
2024-12-17 11:04:37 C 23 05 16.16 -08 07 38.2 V D29
2024-12-17 11:22:18 C 23 05 19.49 -08 07 11.9 V D29
2024-12-27 18:26:10 B 23 52 45.34 -01 48 56.8 X 122
2024-12-27 18:52:38 B 23 52 50.39 -01 48 15.1 X 122
2024-12-27 19:18:26 B 23 52 55.32 -01 47 34.9 X 122
2025-01-09 14:48:15 C 00 52 51.770 +06 12 08.35 X N42
2025-01-09 14:59:57 C 00 52 54.029 +06 12 23.90 X N42
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)