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
2019-04-07 06:17:09 C 11 10 25.626 +11 41 05.56 X 309
2019-04-07 06:21:31 C 11 10 25.461 +11 41 05.98 X 309
2019-04-07 06:22:56 C 11 10 25.408 +11 41 06.10 X 309
2019-04-07 06:24:21 C 11 10 25.354 +11 41 06.24 X 309
2019-04-07 06:25:49 C 11 10 25.299 +11 41 06.37 X 309
2019-04-11 06:07:32 C 11 07 15.21 +11 48 15.4 V G96
2019-04-11 06:14:58 C 11 07 14.98 +11 48 15.4 V G96
2019-04-11 06:22:26 C 11 07 14.77 +11 48 15.5 V G96
2019-04-11 06:29:51 C 11 07 14.50 +11 48 15.8 V G96
2019-04-24 05:57:43 C 11 01 13.199 +11 44 21.41 V F51
2019-04-24 06:14:45 C 11 01 13.015 +11 44 20.29 V F51
2019-04-24 06:31:45 C 11 01 12.826 +11 44 19.03 V F51
2019-04-24 06:48:50 C 11 01 12.643 +11 44 17.73 V F51
2020-07-31 14:21:21 C 03 21 36.970 +13 01 35.11 V F51
2020-07-31 14:28:08 C 03 21 38.325 +13 01 40.66 V F51
2020-07-31 14:34:56 C 03 21 39.689 +13 01 46.25 V F51
2020-07-31 14:41:40 C 03 21 41.035 +13 01 51.77 V F51
2020-08-18 19:37:18 C 04 51 41.04 +17 49 34.9 q D29
2020-08-18 19:57:39 C 04 51 45.22 +17 49 45.3 q D29
2020-08-18 20:18:01 C 04 51 49.37 +17 49 54.7 q D29
2020-09-19 14:25:31 C 07 18 15.69 +19 50 26.1 o F65
2020-09-19 14:26:48 C 07 18 15.92 +19 50 25.1 o F65
2020-09-19 14:28:04 C 07 18 16.13 +19 50 25.1 o F65
2020-09-19 14:29:20 C 07 18 16.31 +19 50 24.9 o F65
2020-09-29 14:42:21 C 07 58 01.337 +19 05 59.92 U F51
2020-09-29 14:48:52 C 07 58 02.357 +19 05 58.45 U F51
2020-09-29 14:55:22 C 07 58 03.370 +19 05 56.96 U F51
2020-09-29 15:01:54 C 07 58 04.382 +19 05 55.44 U F51
2020-10-05 11:51:00 C 08 19 43.717 +18 28 12.21 V G37
2020-10-05 11:56:43 C 08 19 44.558 +18 28 10.56 V G37
2020-10-05 12:01:23 C 08 19 45.246 +18 28 09.24 V G37
2020-10-06 13:59:01 C 08 23 37.030 +18 20 29.87 U F52
2020-10-06 14:34:00 C 08 23 42.128 +18 20 19.86 U F52
2020-10-06 14:51:27 C 08 23 44.702 +18 20 14.92 U F52
2020-10-19 11:33:46 C 09 06 29.26 +16 36 27.9 V G96
2020-10-19 11:41:51 C 09 06 30.29 +16 36 25.1 V G96
2020-10-19 11:49:57 C 09 06 31.32 +16 36 22.2 V G96
2020-10-19 11:58:01 C 09 06 32.31 +16 36 19.0 V G96
2020-10-19 19:44:59 C 09 07 32.59 +16 33 29.8 q D29
2020-10-19 20:25:42 C 09 07 37.73 +16 33 15.1 q D29
2020-10-24 11:13:43 C 09 21 30.564 +15 52 34.30 V G37
2020-10-24 11:17:01 C 09 21 30.965 +15 52 33.10 V G37
2020-10-24 11:20:20 C 09 21 31.362 +15 52 31.92 V G37
2020-10-24 11:23:39 C 09 21 31.760 +15 52 30.71 V G37
2020-11-14 12:25:59 C 10 15 46.95 +12 50 45.1 V G96
2020-11-14 12:32:46 C 10 15 47.57 +12 50 43.1 V G96
2020-11-14 12:39:31 C 10 15 48.19 +12 50 41.0 V G96
2020-11-14 12:46:17 C 10 15 48.79 +12 50 38.8 V G96
2020-11-22 14:45:00 C 10 32 41.760 +11 51 05.49 U F52
2020-11-22 14:59:46 C 10 32 42.912 +11 51 01.47 U F52
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)