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
2021-01-20 06:43:26 C 11 12 57.899 +12 31 38.06 X Z19
2021-01-20 06:44:35 C 11 12 57.855 +12 31 38.54 X Z19
2021-01-20 06:45:44 C 11 12 57.814 +12 31 38.95 X Z19
2021-01-20 06:57:34 C 11 12 57.359 +12 31 43.67 X Z19
2021-02-05 07:37:24 C 10 52 47.76 +15 28 11.5 V 703
2021-02-05 07:45:28 C 10 52 47.22 +15 28 15.2 V 703
2021-02-05 07:53:33 C 10 52 46.59 +15 28 19.1 V 703
2021-02-05 08:01:38 C 10 52 46.11 +15 28 23.3 V 703
2021-02-05 09:39:16 C 10 52 39.29 +15 29 10.5 V G96
2021-02-05 09:46:38 C 10 52 38.78 +15 29 14.0 V G96
2021-02-05 09:54:01 C 10 52 38.26 +15 29 17.5 V G96
2021-02-05 10:01:24 C 10 52 37.74 +15 29 21.0 V G96
2021-02-08 10:18:14 C 10 47 42.09 +16 03 54.4 V T08
2021-02-08 10:57:38 C 10 47 39.23 +16 04 13.0 V T08
2021-02-08 11:00:57 C 10 47 38.94 +16 04 14.2 V T08
2021-02-08 11:04:56 C 10 47 38.64 +16 04 17.4 V T08
2021-02-09 07:51:02 C 10 46 11.05 +16 13 59.5 V 703
2021-02-09 07:58:34 C 10 46 10.49 +16 14 03.1 V 703
2021-02-09 08:06:06 C 10 46 09.93 +16 14 07.0 V 703
2021-02-09 08:13:37 C 10 46 09.41 +16 14 11.0 V 703
2021-02-10 10:20:09 C 10 44 18.20 +16 26 20.3 V T05
2021-02-10 10:24:54 C 10 44 17.94 +16 26 23.6 V T05
2021-02-10 10:28:52 C 10 44 17.65 +16 26 24.1 V T05
2021-02-10 10:36:46 C 10 44 17.08 +16 26 28.4 V T05
2021-02-11 08:53:11 C 10 42 41.416 +16 36 39.91 U F52
2021-02-11 09:12:27 C 10 42 39.978 +16 36 48.87 U F52
2021-02-11 09:31:47 C 10 42 38.533 +16 36 57.78 U F52
2021-02-11 16:02:21 C 10 42 10.17 +16 39 52.8 q D29
2021-02-11 16:22:43 C 10 42 08.62 +16 40 02.1 q D29
2021-02-11 16:43:06 C 10 42 07.10 +16 40 11.4 q D29
2021-02-12 07:17:36 C 10 41 03.90 +16 46 45.2 V H06
2021-02-12 07:33:30 C 10 41 02.70 +16 46 52.7 V H06
2021-02-12 07:54:46 C 10 41 01.10 +16 47 02.6 V H06
2021-02-12 08:16:04 C 10 40 59.48 +16 47 11.6 V H06
2021-02-12 08:40:04 C 10 40 57.69 +16 47 22.0 V H06
2021-02-12 11:44:33 C 10 40 44.35 +16 48 47.9 V T08
2021-02-12 11:50:41 C 10 40 43.85 +16 48 50.7 V T08
2021-02-12 12:00:18 C 10 40 43.16 +16 48 54.6 V T08
2021-02-12 12:37:29 C 10 40 40.33 +16 49 11.2 V T08
2021-02-17 03:29:10 C 10 32 35.652 +17 36 13.83 X G37
2021-02-17 03:34:21 C 10 32 35.270 +17 36 15.98 X G37
2021-02-17 03:37:30 C 10 32 35.039 +17 36 17.27 X G37
2021-02-17 03:53:23 C 10 32 33.860 +17 36 23.84 X G37
2021-02-17 03:56:31 C 10 32 33.626 +17 36 25.12 X G37
2021-02-17 03:59:40 C 10 32 33.388 +17 36 26.46 X G37
2021-02-17 04:02:49 C 10 32 33.159 +17 36 27.74 X G37
2021-02-17 04:18:45 C 10 32 31.972 +17 36 34.32 X G37
2021-02-17 04:21:54 C 10 32 31.739 +17 36 35.59 X G37
2021-02-17 04:25:02 C 10 32 31.503 +17 36 36.90 X G37
2021-02-17 04:28:11 C 10 32 31.267 +17 36 38.20 X G37
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)