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
2025-01-09 15:09:58 C 00 52 55.622 +06 12 36.18 X N42
2025-01-11 13:50:47 C 01 02 01.920 +07 22 38.80 O18
2025-01-11 14:35:26 C 01 02 10.486 +07 23 44.76 O18
2025-01-12 03:44:14 C 01 04 44.170 +07 43 14.09 V G96
2025-01-12 03:51:40 C 01 04 45.620 +07 43 25.57 V G96
2025-01-12 03:59:07 C 01 04 47.010 +07 43 36.62 V G96
2025-01-12 04:06:33 C 01 04 48.450 +07 43 47.14 V G96
2025-01-12 13:05:28 C 01 06 33.662 +07 57 00.26 O18
2025-01-12 13:06:45 C 01 06 33.904 +07 57 02.18 O18
2025-01-13 12:20:28 C 01 11 05.180 +08 31 00.39 O18
2025-01-13 13:16:16 C 01 11 15.847 +08 32 21.55 O18
2025-01-18 11:15:35 C 01 34 07.11 +11 18 33.0 V D29
2025-01-18 11:21:56 C 01 34 08.31 +11 18 41.3 V D29
2025-01-18 11:35:54 C 01 34 10.95 +11 19 00.6 V D29
2025-01-18 11:42:15 C 01 34 12.17 +11 19 09.1 V D29
2025-01-18 11:56:13 C 01 34 14.80 +11 19 27.3 V D29
2025-01-18 12:02:34 C 01 34 16.00 +11 19 36.7 V D29
2025-01-24 02:50:18 C 02 00 05.634 +14 14 16.22 V 703
2025-01-24 02:59:09 C 02 00 07.268 +14 14 26.95 V 703
2025-01-25 02:45:43 C 02 04 38.215 +14 43 24.92 V G96
2025-01-25 02:53:55 C 02 04 39.745 +14 43 34.68 V G96
2025-01-25 03:02:06 C 02 04 41.286 +14 43 44.54 V G96
2025-01-25 03:10:17 C 02 04 42.809 +14 43 54.01 V G96
2025-01-26 01:56:53 C 02 09 01.832 +15 11 05.32 V G96
2025-01-26 02:09:20 C 02 09 04.144 +15 11 19.93 V G96
2025-01-26 02:17:29 C 02 09 05.634 +15 11 29.54 V G96
2025-01-26 02:25:37 C 02 09 07.178 +15 11 39.12 V G96
2025-02-11 06:23:17 C 03 20 12.493 +21 28 33.55 X F51
2025-02-11 06:42:58 C 03 20 15.918 +21 28 48.41 X F51
2025-02-11 07:02:37 C 03 20 19.322 +21 29 03.33 X F51
2025-02-16 02:11:43 C 03 40 22.472 +22 49 49.01 V G96
2025-02-16 02:19:49 C 03 40 23.826 +22 49 54.26 V G96
2025-02-16 02:27:54 C 03 40 25.169 +22 49 59.20 V G96
2025-02-16 02:35:59 C 03 40 26.558 +22 50 04.63 V G96
2025-02-21 06:11:58 C 04 01 20.841 +24 02 11.50 X F51
2025-02-21 06:25:22 C 04 01 23.048 +24 02 18.29 X F51
2025-02-21 06:38:58 C 04 01 25.279 +24 02 25.36 X F51
2025-02-27 02:24:08 C 04 24 17.381 +25 07 05.38 V G96
2025-02-27 02:32:21 C 04 24 18.659 +25 07 08.72 V G96
2025-02-27 02:40:35 C 04 24 19.980 +25 07 12.07 V G96
2025-02-27 02:48:49 C 04 24 21.280 +25 07 15.31 V G96
2025-03-11 12:35:52 S 05 10 20.054 +26 33 26.25 X 275
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)