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
2002-02-14 07:26:27 C 10 01 34.84 +20 39 09.2 19.5 c 704
2002-02-14 08:08:21 C 10 01 31.41 +20 39 25.5 18.9 c 704
2002-02-14 08:30:17 C 10 01 29.70 +20 39 32.9 18.6 c 704
2002-02-14 08:51:57 C 10 01 28.04 +20 39 40.1 18.7 c 704
2002-02-14 09:13:14 C 10 01 26.42 +20 39 47.4 18.8 c 704
2002-02-14 10:32:00 C 10 01 20.50 +20 40 13.9 18.5 c 644
2002-02-14 10:46:53 C 10 01 19.38 +20 40 19.1 19.0 c 644
2002-02-14 11:03:38 C 10 01 18.10 +20 40 24.7 19.5 c 644
2002-02-15 05:52:36 C 09 59 56.16 +20 46 46.0 18.8 c 704
2002-02-15 06:13:43 C 09 59 54.54 +20 46 53.1 18.7 c 704
2002-02-15 06:34:43 C 09 59 52.94 +20 47 00.2 19.1 c 704
2002-02-15 06:56:12 C 09 59 51.30 +20 47 07.6 18.8 c 704
2002-02-15 07:16:55 C 09 59 49.76 +20 47 14.2 18.6 c 704
2002-02-15 08:40:37 C 09 59 43.39 +20 47 40.9 V 644
2002-02-15 08:55:50 C 09 59 42.21 +20 47 45.8 V 644
2002-02-15 09:16:07 C 09 59 40.68 +20 47 52.5 V 644
2002-02-18 08:26:51 C 09 54 36.82 +21 09 41.8 19.5 c 608
2002-02-18 08:44:19 C 09 54 35.56 +21 09 47.3 19.6 c 608
2002-02-18 08:59:19 C 09 54 34.42 +21 09 51.5 19.4 c 608
2002-02-23 06:41:21 C 09 46 48.45 +21 38 29.3 18.9 d 644
2002-02-23 07:11:52 C 09 46 46.47 +21 38 35.6 18.8 d 644
2002-02-23 07:41:51 C 09 46 44.51 +21 38 41.8 19.1 d 644
2002-03-02 08:50:14 C 09 37 21.64 +22 04 07.4 20.2 c 644
2002-03-02 09:04:39 C 09 37 20.92 +22 04 09.0 20.3 c 644
2002-03-02 09:19:35 C 09 37 20.15 +22 04 10.1 20.2 c 644
2002-03-08 22:39:27 C 09 30 47.65 +22 12 40.5 c 246
2002-03-08 22:42:35 C 09 30 47.51 +22 12 41.2 c 246
2002-03-08 22:48:11 C 09 30 47.30 +22 12 41.0 c 246
2002-03-08 22:50:58 C 09 30 47.25 +22 12 41.0 c 246
2002-03-11 04:33:49 C 09 29 03.78 +22 12 41.2 V 644
2002-03-11 05:03:53 C 09 29 02.83 +22 12 41.3 V 644
2002-03-11 05:34:01 C 09 29 01.91 +22 12 41.0 V 644
2003-06-04 16:04:54 C 20 53 15.91 -20 28 00.6 c 474
2003-06-04 16:09:04 C 20 53 16.09 -20 28 00.4 c 474
2003-06-04 16:13:04 C 20 53 16.20 -20 28 00.9 c 474
2003-06-04 16:15:55 C 20 53 16.40 -20 28 00.7 c 474
2003-06-04 16:20:04 C 20 53 16.58 -20 28 00.3 c 474
2003-06-04 16:25:25 C 20 53 16.82 -20 28 00.5 c 474
2003-07-08 08:05:53 C 21 20 18.17 -22 35 24.6 18.0 c 644
2003-07-08 08:35:55 C 21 20 18.44 -22 35 36.1 18.0 c 644
2003-07-08 09:07:03 C 21 20 18.71 -22 35 47.9 18.0 c 644
2003-07-11 10:54:41 C 21 21 07.24 -23 04 49.5 o 608
2003-07-11 11:10:16 C 21 21 07.40 -23 04 56.2 o 608
2003-07-11 11:25:08 C 21 21 07.30 -23 05 02.9 o 608
2003-07-19 04:09:08 C 21 21 31.36 -24 34 20.9 m 859
2003-07-19 04:22:30 C 21 21 31.15 -24 34 27.4 m 859
2003-07-19 04:33:37 C 21 21 31.13 -24 34 34.5 m 859
2003-07-25 16:34:26 C 21 19 51.01 -26 09 30.4 e 428
2003-07-25 17:19:43 C 21 19 49.83 -26 10 00.0 e 428
2003-08-10 02:34:26 C 21 08 15.76 -30 57 01.7 m 859
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)