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
2009-05-13 06:11:45 C 15 41 54.48 -17 37 06.4 o 691
2009-05-13 06:37:14 C 15 41 52.80 -17 37 02.4 o 691
2009-05-13 07:02:37 C 15 41 51.17 -17 36 58.8 o 691
2009-05-24 07:40:36 C 15 24 36.49 -16 53 56.3 o 691
2009-05-24 08:06:06 C 15 24 34.80 -16 53 52.5 o 691
2009-05-24 08:31:31 C 15 24 33.09 -16 53 48.2 o 691
2009-05-28 06:31:53 C 15 18 32.90 -16 38 21.1 o 691
2009-05-28 07:22:41 C 15 18 29.65 -16 38 12.4 o 691
2011-04-01 11:15:25 C 15 25 26.75 -15 18 36.3 o 691
2011-04-01 11:41:00 C 15 25 25.99 -15 18 33.9 o 691
2011-04-01 12:16:32 C 15 25 25.03 -15 18 29.7 o 691
2011-04-05 11:18:54 C 15 22 34.15 -15 07 02.4 o 691
2011-04-05 11:44:29 C 15 22 33.23 -15 06 58.8 o 691
2011-04-29 09:25:24 C 14 54 41.14 -13 21 57.2 r G96
2011-04-29 09:33:02 C 14 54 40.71 -13 21 55.5 r G96
2011-04-29 09:40:34 C 14 54 40.21 -13 21 54.0 r G96
2011-04-29 09:48:06 C 14 54 39.74 -13 21 52.3 r G96
2011-05-09 06:35:26 C 14 40 11.82 -12 28 22.5 r G96
2011-05-09 06:47:01 C 14 40 11.06 -12 28 20.4 r G96
2011-05-09 06:58:33 C 14 40 10.38 -12 28 17.7 r G96
2011-05-09 07:10:16 C 14 40 09.62 -12 28 14.8 r G96
2011-05-24 05:13:42 C 14 19 52.50 -11 15 48.9 r G96
2011-05-24 05:23:49 C 14 19 52.03 -11 15 46.9 r G96
2011-05-24 05:33:50 C 14 19 51.49 -11 15 45.1 r G96
2011-05-24 05:43:48 C 14 19 50.98 -11 15 43.4 r G96
2013-04-11 11:36:52 C 14 18 00.613 -09 22 52.21 V F51
2013-04-13 11:07:42 C 14 15 21.283 -09 10 03.66 V F51
2013-04-13 11:27:43 C 14 15 20.112 -09 09 58.13 V F51
2013-04-13 11:47:42 C 14 15 18.940 -09 09 52.80 V F51
2013-04-13 12:07:43 C 14 15 17.780 -09 09 47.35 V F51
2013-04-15 11:37:27 C 14 12 35.010 -08 56 49.10 V F51
2013-04-15 11:52:17 C 14 12 34.131 -08 56 44.98 V F51
2013-04-21 10:26:22 C 14 04 12.777 -08 17 27.97 V F51
2013-04-22 09:41:05 C 14 02 50.287 -08 11 05.70 V F51
2013-04-22 09:57:31 C 14 02 49.283 -08 11 01.23 V F51
2013-05-03 08:59:01 C 13 47 37.401 -07 02 54.40 V F51
2013-05-03 09:18:32 C 13 47 36.288 -07 02 49.78 V F51
2013-05-03 09:38:05 C 13 47 35.179 -07 02 45.11 V F51
2013-05-03 09:57:35 C 13 47 34.070 -07 02 40.46 V F51
2013-05-08 21:31:42 C 13 40 37.53 -06 33 27.6 q 493
2013-05-08 21:55:31 C 13 40 36.29 -06 33 22.7 q 493
2013-05-08 22:19:18 C 13 40 35.07 -06 33 18.1 q 493
2015-01-23 14:33:40 C 13 53 26.730 -07 33 03.28 V F51
2015-01-23 14:50:23 C 13 53 27.239 -07 33 05.20 V F51
2015-01-23 15:07:06 C 13 53 27.768 -07 33 07.39 V F51
2015-01-23 15:24:49 C 13 53 28.315 -07 33 09.55 V F51
2015-02-23 14:14:23 C 14 03 46.172 -07 43 23.15 V F51
2015-02-23 14:33:09 C 14 03 46.002 -07 43 21.18 V F51
2015-02-23 14:51:56 C 14 03 45.830 -07 43 19.17 V F51
2015-02-23 15:10:40 C 14 03 45.651 -07 43 17.25 V F51
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)