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
2022-09-08 22:19:27 C 00 39 31.337 -33 02 27.38 V M22
2022-09-08 22:22:42 C 00 39 32.062 -33 02 30.66 V M22
2022-09-08 22:28:12 C 00 39 33.271 -33 02 35.77 V M22
2022-09-08 22:30:09 C 00 39 33.706 -33 02 37.90 V M22
2022-09-09 07:14:40 C 00 41 38.045 -33 10 33.82 V W68
2022-09-09 07:15:19 C 00 41 38.196 -33 10 34.43 V W68
2022-09-09 07:15:58 C 00 41 38.338 -33 10 35.00 V W68
2022-09-09 07:16:37 C 00 41 38.477 -33 10 35.47 V W68
2022-09-09 07:17:16 C 00 41 38.630 -33 10 36.12 V W68
2022-09-10 03:43:19 C 00 46 49.788 -33 28 49.46 X Y00
2022-09-10 03:47:13 C 00 46 50.694 -33 28 52.89 X Y00
2022-09-10 03:50:50 C 00 46 51.532 -33 28 56.16 X Y00
2022-09-12 04:23:56 C 01 00 05.083 -34 08 40.16 V W68
2022-09-12 04:28:34 C 01 00 06.310 -34 08 44.23 V W68
2022-09-12 04:30:31 C 01 00 06.818 -34 08 46.03 V W68
2022-09-12 04:33:08 C 01 00 07.512 -34 08 48.19 V W68
2022-09-12 04:35:50 C 01 00 08.227 -34 08 50.32 V W68
2022-09-12 04:37:47 C 01 00 08.743 -34 08 52.15 V W68
2022-09-12 04:43:39 C 01 00 10.310 -34 08 57.05 V W68
2022-09-12 04:45:37 C 01 00 10.814 -34 08 58.81 V W68
2022-09-12 23:33:43 C 01 05 45.009 -34 22 52.37 X Y00
2022-09-12 23:48:35 C 01 05 49.344 -34 23 05.98 X Y00
2022-09-13 00:04:59 C 01 05 54.068 -34 23 20.90 X Y00
2022-09-14 00:50:01 C 01 13 23.796 -34 40 43.10 V M22
2022-09-14 00:55:13 C 01 13 25.308 -34 40 46.42 V M22
2022-09-14 01:02:38 C 01 13 27.461 -34 40 51.10 V M22
2022-09-14 01:35:51 C 01 13 37.128 -34 41 11.36 V M22
2022-09-14 03:48:34 C 01 14 24.44 -34 43 16.0 q X33
2022-09-14 03:52:11 C 01 14 25.52 -34 43 18.8 q X33
2022-09-14 03:55:51 C 01 14 26.59 -34 43 21.4 q X33
2022-09-15 08:52:14 V 01 23 57.78 -34 59 26.6 V 270
2022-09-15 08:52:14 v 1 175.46578 -37.91864 270
2022-09-15 09:48:11 V 01 24 16.26 -35 00 06.3 V 270
2022-09-15 09:48:11 v 1 175.46578 -37.91864 270
2022-09-15 10:45:47 V 01 24 34.89 -35 00 46.1 V 270
2022-09-15 10:45:47 v 1 175.46578 -37.91864 270
2022-09-15 11:45:28 V 01 24 54.01 -35 01 25.4 V 270
2022-09-15 11:45:28 v 1 175.46578 -37.91864 270
2022-09-15 19:08:00 C 01 27 28.351 -35 04 57.07 V M22
2022-09-15 19:12:02 C 01 27 29.724 -35 04 59.99 V M22
2022-09-15 19:20:57 C 01 27 32.753 -35 05 06.07 V M22
2022-09-15 19:25:00 C 01 27 34.126 -35 05 08.92 V M22
2022-09-15 21:55:02 C 01 28 23.832 -35 06 47.70 V M22
2022-09-16 02:20:09 C 01 29 58.26 -35 09 29.8 q X33
2022-09-16 02:23:49 C 01 29 59.45 -35 09 31.6 q X33
2022-09-16 02:27:30 C 01 30 00.67 -35 09 34.3 q X33
2022-09-16 08:59:08 C 01 32 18.156 -35 13 04.37 V T08
2022-09-16 09:07:52 C 01 32 21.074 -35 13 09.62 V T08
2022-09-16 09:08:45 C 01 32 21.394 -35 13 10.85 V T05
2022-09-16 09:15:13 C 01 32 23.542 -35 13 14.38 V T08
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)