2021 AD4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.0881398000
Semi-major axis (a)0.9072285000 AU
Inclination (i)9.46441000°
Long. of Asc. Node (Ω)106.54988000°
Arg. of Perihelion (ω)194.22344000°
Mean Anomaly (M)33.96405000°
Mean Motion (n)1.1405886600°/day
Perihelion dist (q)0.82726560 AU
Aphelion dist (Q)0.98719140 AU
Orbital Period0.86412190 yr
Physical Parameters
H (abs. magnitude)25.66
G (slope)0.15
Orbit Solution
SourceMPC
Solution Date
RMS Residual0.750″
Uncertainty6
Orbit TypeAtira
MOID0.000539 AU
Observations Used42
Oppositions1
Arc Total
First Observation Used
Last Observation Used2021-01-18
Observations (42)
Date Type RA Dec Mag Band Observatory
2021-01-09 12:51:59 C 13 32 09.36 +19 22 45.0 V G96
2021-01-09 13:00:45 C 13 32 13.07 +19 25 05.5 V G96
2021-01-09 13:09:31 C 13 32 16.83 +19 27 27.3 V G96
2021-01-09 13:18:17 C 13 32 20.58 +19 29 50.4 V G96
2021-01-09 13:27:25 C 13 32 24.49 +19 32 18.3 V G96
2021-01-09 13:27:45 C 13 32 24.68 +19 32 23.6 V G96
2021-01-09 13:28:05 C 13 32 24.77 +19 32 29.1 V G96
2021-01-09 13:28:25 C 13 32 24.87 +19 32 34.7 V G96
2021-01-10 12:31:47 C 13 44 53.64 +25 37 42.7 V G96
2021-01-10 12:32:37 C 13 44 54.03 +25 37 55.8 V G96
2021-01-10 12:33:27 C 13 44 54.42 +25 38 09.0 V G96
2021-01-10 12:34:17 C 13 44 54.80 +25 38 22.2 V G96
2021-01-11 00:14:24 C 13 51 38.11 +28 33 41.9 V L01
2021-01-11 00:17:25 C 13 51 39.75 +28 34 29.3 V L01
2021-01-11 00:23:31 C 13 51 43.05 +28 36 03.1 V L01
2021-01-11 00:29:17 C 13 51 46.28 +28 37 33.8 V L01
2021-01-11 01:25:01 C 13 52 14.76 +28 51 26.0 V 033
2021-01-11 01:26:05 C 13 52 15.34 +28 51 42.7 V 033
2021-01-11 01:27:10 C 13 52 15.91 +28 51 59.1 V 033
2021-01-11 01:28:15 C 13 52 16.50 +28 52 16.0 V 033
2021-01-11 02:36:57 C 13 52 54.72 +29 10 11.0 V 204
2021-01-11 02:59:33 C 13 53 06.32 +29 15 56.6 V 204
2021-01-12 14:05:56 C 14 13 59.750 +37 29 26.09 V T12
2021-01-12 14:07:07 C 14 14 00.375 +37 29 42.10 V T12
2021-01-12 14:08:28 C 14 14 01.099 +37 30 00.53 V T12
2021-01-13 11:13:21 C 14 27 11.21 +41 49 06.1 V I52
2021-01-13 11:15:59 C 14 27 12.69 +41 49 38.2 V I52
2021-01-13 11:18:38 C 14 27 14.16 +41 50 10.4 V I52
2021-01-13 11:21:16 C 14 27 15.67 +41 50 43.3 V I52
2021-01-15 12:14:59 C 14 59 30.13 +50 07 34.4 V I52
2021-01-15 12:18:37 C 14 59 32.28 +50 08 07.4 V I52
2021-01-15 12:22:15 C 14 59 34.39 +50 08 40.7 V I52
2021-01-16 11:24:24 C 15 15 28.60 +53 12 59.6 V I52
2021-01-16 11:26:50 C 15 15 30.18 +53 13 18.8 V I52
2021-01-16 11:29:15 C 15 15 31.68 +53 13 38.4 V I52
2021-01-16 11:31:40 C 15 15 33.20 +53 13 57.8 V I52
2021-01-17 11:46:06 C 15 32 24.93 +55 58 37.7 V I52
2021-01-17 11:49:44 C 15 32 27.17 +55 59 02.8 V I52
2021-01-18 12:00:51 C 15 49 21.08 +58 16 17.2 V I52
2021-01-18 12:05:41 C 15 49 24.09 +58 16 44.6 V I52
2021-01-18 12:10:31 C 15 49 27.09 +58 17 12.0 V I52
2021-01-18 12:15:21 C 15 49 30.12 +58 17 39.8 V I52