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
2021-02-17 09:42:19 C 10 32 07.515 +17 38 44.74 X G37
2021-02-17 09:45:27 C 10 32 07.274 +17 38 46.01 X G37
2021-02-17 09:49:38 C 10 32 07.03 +17 38 48.0 U I41
2021-02-17 10:05:24 C 10 32 05.770 +17 38 53.80 X G37
2021-02-17 10:08:33 C 10 32 05.529 +17 38 55.04 X G37
2021-02-17 10:11:42 C 10 32 05.296 +17 38 56.26 X G37
2021-02-17 10:14:50 C 10 32 05.056 +17 38 57.51 X G37
2021-02-17 10:17:59 C 10 32 04.817 +17 38 58.75 X G37
2021-02-17 10:21:07 C 10 32 04.584 +17 38 59.96 X G37
2021-02-17 10:27:24 C 10 32 04.111 +17 39 02.40 X G37
2021-02-17 10:30:33 C 10 32 03.873 +17 39 03.63 X G37
2021-02-17 10:33:41 C 10 32 03.634 +17 39 04.88 X G37
2021-02-17 10:37:04 C 10 32 03.383 +17 39 06.18 X G37
2021-02-17 10:40:12 C 10 32 03.144 +17 39 07.42 X G37
2021-02-17 11:08:29 C 10 32 01.019 +17 39 18.42 X G37
2021-02-17 11:11:38 C 10 32 00.786 +17 39 19.64 X G37
2021-02-17 11:14:46 C 10 32 00.546 +17 39 20.87 X G37
2021-02-17 11:17:55 C 10 32 00.314 +17 39 22.06 X G37
2021-02-17 11:33:37 C 10 31 59.136 +17 39 28.19 X G37
2021-02-17 11:36:46 C 10 31 58.903 +17 39 29.39 X G37
2021-02-17 11:39:54 C 10 31 58.668 +17 39 30.59 X G37
2021-02-17 11:43:03 C 10 31 58.434 +17 39 31.82 X G37
2021-02-17 11:46:11 C 10 31 58.196 +17 39 33.04 X G37
2021-02-17 11:49:20 C 10 31 57.964 +17 39 34.25 X G37
2021-02-17 11:52:28 C 10 31 57.725 +17 39 35.47 X G37
2021-02-17 11:55:37 C 10 31 57.494 +17 39 36.70 X G37
2021-02-17 11:58:45 C 10 31 57.261 +17 39 37.90 X G37
2021-02-17 12:01:54 C 10 31 57.025 +17 39 39.12 X G37
2021-02-17 12:05:03 C 10 31 56.792 +17 39 40.32 X G37
2021-02-17 12:08:11 C 10 31 56.562 +17 39 41.52 X G37
2021-02-17 12:11:27 C 10 31 56.316 +17 39 42.80 X G37
2021-02-17 12:14:36 C 10 31 56.082 +17 39 44.00 X G37
2021-02-17 12:17:44 C 10 31 55.847 +17 39 45.23 X G37
2021-02-17 12:20:53 C 10 31 55.616 +17 39 46.44 X G37
2021-02-17 12:42:52 C 10 31 53.981 +17 39 54.93 X G37
2021-02-17 12:46:01 C 10 31 53.761 +17 39 56.09 X G37
2021-02-17 12:49:09 C 10 31 53.514 +17 39 57.33 X G37
2021-02-17 12:58:35 C 10 31 52.831 +17 40 00.93 X G37
2021-02-17 13:01:43 C 10 31 52.592 +17 40 02.17 X G37
2021-02-17 13:04:52 C 10 31 52.360 +17 40 03.38 X G37
2021-02-17 13:08:01 C 10 31 52.130 +17 40 04.61 X G37
2021-02-17 13:11:09 C 10 31 51.902 +17 40 05.78 X G37
2021-02-17 13:17:26 C 10 31 51.437 +17 40 08.19 X G37
2021-02-21 06:03:17 C 10 25 28.69 +18 13 23.1 V 703
2021-02-21 06:11:32 C 10 25 28.02 +18 13 25.8 V 703
2021-02-21 06:28:02 C 10 25 26.88 +18 13 32.8 V 703
2021-02-22 05:54:54 C 10 23 47.60 +18 21 35.6 U I41
2021-02-22 06:01:04 C 10 23 47.12 +18 21 37.7 V I52
2021-02-22 06:08:34 C 10 23 46.55 +18 21 40.6 V I52
2021-02-22 06:16:04 C 10 23 46.00 +18 21 42.9 V I52
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)