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
1996-04-11 06:42:03 c 12 56 33.88 -00 29 16.8 i 691
1996-04-11 07:12:52 c 12 56 32.09 -00 29 07.7 i 691
1996-04-11 07:43:48 c 12 56 30.25 -00 28 58.1 i 691
1996-04-12 05:33:00 c 12 55 15.71 -00 22 34.0 i 691
1996-04-12 05:42:18 c 12 55 15.19 -00 22 31.6 i 691
1996-04-12 05:51:31 c 12 55 14.62 -00 22 28.4 i 691
1996-04-13 05:32:09 c 12 53 54.42 -00 15 39.4 i 691
1996-04-14 07:45:18 c 12 52 26.32 -00 08 15.5 i 691
1996-04-14 07:54:14 c 12 52 25.81 -00 08 12.7 i 691
1996-04-14 08:03:10 c 12 52 25.33 -00 08 10.5 i 691
1996-04-15 05:38:55 c 12 51 14.05 -00 02 14.3 i 691
1996-04-15 05:46:54 c 12 51 13.62 -00 02 12.2 i 691
1996-04-15 05:55:39 c 12 51 13.13 -00 02 09.2 i 691
1996-04-15 09:52:37 C 12 50 59.97 -00 01 04.4 c 608
1996-04-15 10:32:33 C 12 50 57.83 -00 00 54.3 c 608
1996-04-16 09:02:59 C 12 49 44.73 +00 05 01.1 c 608
1996-04-16 09:48:25 C 12 49 42.19 +00 05 16.3 c 608
1996-04-18 03:51:01 c 12 47 28.19 +00 16 03.8 i 691
1996-04-18 04:21:08 c 12 47 26.53 +00 16 10.8 i 691
1996-04-18 04:51:06 c 12 47 24.93 +00 16 18.4 i 691
1996-05-16 04:31:16 C 12 23 49.41 +01 38 28.2 22.1 i 691
1996-05-16 05:55:52 C 12 23 47.99 +01 38 27.5 22.2 i 691
1996-05-16 06:39:03 C 12 23 47.26 +01 38 26.8 22.3 i 691
1998-03-08 06:04:27 C 12 41 29.55 +02 11 35.3 a 696
1998-03-08 06:10:03 C 12 41 29.27 +02 11 37.5 a 696
1998-04-01 06:45:46 C 12 07 21.98 +05 37 46.7 a 693
1998-04-01 06:49:07 C 12 07 21.79 +05 37 47.8 a 693
1998-04-01 06:51:25 C 12 07 21.71 +05 37 48.9 a 693
2000-02-26 15:03:13 C 11 40 16.86 +09 48 25.6 413
2000-02-26 15:06:24 C 11 40 16.65 +09 48 27.1 413
2000-03-15 07:49:49 C 11 12 47.22 +12 27 54.2 b 691
2000-03-15 07:56:50 C 11 12 46.77 +12 27 56.4 b 691
2000-03-15 08:02:29 C 11 12 46.40 +12 27 58.2 b 691
2001-06-15 10:57:29 C 23 35 44.00 -07 05 16.9 d 691
2001-06-15 11:02:57 C 23 35 44.80 -07 05 13.4 d 691
2001-06-15 11:08:34 C 23 35 45.51 -07 05 09.4 d 691
2001-12-13 10:12:55 C 10 47 29.10 +12 05 31.3 19.0 c 704
2001-12-13 10:35:09 C 10 47 29.91 +12 05 30.9 19.3 c 704
2001-12-13 10:57:16 C 10 47 30.78 +12 05 31.4 19.7 c 704
2001-12-13 11:19:16 C 10 47 31.58 +12 05 31.5 19.9 c 704
2001-12-13 11:41:13 C 10 47 32.40 +12 05 32.2 19.7 c 704
2002-01-08 11:52:05 C 10 54 02.85 +13 59 47.5 20.2 c 608
2002-01-08 12:07:12 C 10 54 02.46 +13 59 53.7 19.4 c 608
2002-01-08 12:22:11 C 10 54 02.07 +13 59 59.0 19.6 c 608
2002-01-09 09:36:46 C 10 53 31.68 +14 07 54.4 18.7 c 704
2002-01-09 09:58:41 C 10 53 31.14 +14 08 02.6 19.3 c 704
2002-01-09 10:20:51 C 10 53 30.47 +14 08 10.5 19.3 c 704
2002-01-09 10:43:32 C 10 53 29.79 +14 08 20.6 18.8 c 704
2002-01-09 11:05:40 C 10 53 29.15 +14 08 28.6 19.0 c 704
2002-01-10 03:12:09 C 10 53 04.05 +14 14 37.3 c 621
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)