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
2021-02-22 06:23:34 C 10 23 45.47 +18 21 45.6 V I52
2021-02-22 06:54:50 C 10 23 43.21 +18 21 55.8 U I41
2021-02-22 07:26:19 C 10 23 40.92 +18 22 06.6 U I41
2021-02-22 08:00:12 C 10 23 38.44 +18 22 18.0 U I41
2021-02-22 09:37:40 C 10 23 31.33 +18 22 50.4 U I41
2021-02-22 10:57:08 C 10 23 25.97 +18 23 19.5 V T05
2021-02-22 11:01:31 C 10 23 25.63 +18 23 21.1 V T05
2021-02-22 11:11:35 C 10 23 24.91 +18 23 24.7 V T05
2021-02-22 11:32:28 C 10 23 23.44 +18 23 31.1 V T05
2021-03-03 07:56:15 C 10 09 35.13 +19 20 58.1 V 703
2021-03-03 08:03:55 C 10 09 34.63 +19 21 00.6 V 703
2021-03-03 08:11:35 C 10 09 34.11 +19 21 03.1 V 703
2021-03-03 08:19:15 C 10 09 33.65 +19 21 04.1 V 703
2021-03-07 06:45:47 C 10 04 19.14 +19 37 50.4 V 703
2021-03-07 06:53:59 C 10 04 18.64 +19 37 51.6 V 703
2021-03-07 07:02:12 C 10 04 18.20 +19 37 53.1 V 703
2021-03-07 07:10:25 C 10 04 17.80 +19 37 54.1 V 703
2021-03-18 05:21:04 C 09 53 24.59 +19 57 45.1 V G96
2021-03-18 05:29:19 C 09 53 24.31 +19 57 45.1 V G96
2021-03-18 05:37:33 C 09 53 24.04 +19 57 45.2 V G96
2021-03-18 05:45:49 C 09 53 23.77 +19 57 45.1 V G96
2021-04-02 19:04:46 C 09 47 35.38 +19 31 15.8 Z L34
2021-04-02 20:05:52 C 09 47 35.11 +19 31 08.8 Z L34
2021-04-02 21:07:42 C 09 47 34.86 +19 30 59.2 Z L34
2021-04-14 07:59:13 C 09 49 36.329 +18 42 40.58 U F51
2021-04-14 08:19:42 C 09 49 36.606 +18 42 36.34 U F51
2021-04-14 08:40:09 C 09 49 36.890 +18 42 31.80 U F51
2021-04-14 09:00:40 C 09 49 37.180 +18 42 27.45 U F51
2021-05-06 04:11:57 C 10 03 58.92 +16 26 48.6 V G96
2021-05-06 04:19:21 C 10 03 59.16 +16 26 46.1 V G96
2021-05-06 04:26:45 C 10 03 59.44 +16 26 43.4 V G96
2021-05-06 04:34:10 C 10 03 59.68 +16 26 42.1 V G96
2022-05-25 13:39:59 C 21 04 30.765 -19 13 54.12 U F52
2022-05-25 13:51:57 C 21 04 31.584 -19 13 52.49 U F52
2022-05-25 14:03:56 C 21 04 32.407 -19 13 50.84 U F52
2022-05-25 14:15:50 C 21 04 33.219 -19 13 49.21 U F52
2022-05-29 06:27:53 C 21 10 46.208 -19 01 43.28 X W74
2022-05-29 06:29:27 C 21 10 46.321 -19 01 43.05 X W74
2022-05-29 06:30:59 C 21 10 46.421 -19 01 42.86 X W74
2022-05-29 06:32:46 C 21 10 46.541 -19 01 42.66 X W74
2022-05-29 06:34:31 C 21 10 46.662 -19 01 42.44 X W74
2022-05-29 06:35:49 C 21 10 46.747 -19 01 42.26 X W74
2022-05-29 06:37:04 C 21 10 46.835 -19 01 42.15 X W74
2022-06-01 10:19:27 C 21 16 03.022 -18 52 13.98 V G96
2022-06-01 10:27:00 C 21 16 03.536 -18 52 13.22 V G96
2022-06-01 10:34:33 C 21 16 04.015 -18 52 12.00 V G96
2022-06-01 10:42:05 C 21 16 04.534 -18 52 11.35 V G96
2022-06-09 13:40:27 C 21 29 24.164 -18 30 55.46 U F52
2022-06-09 13:52:23 C 21 29 24.929 -18 30 54.36 U F52
2022-06-09 14:04:23 C 21 29 25.706 -18 30 53.22 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)