1999 AF4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6078606057 ± 6.32e-09
Semi-major axis (a)2.8500347383 AU ± 7.50e-09
Inclination (i)12.67624326° ± 1.91e-06
Long. of Asc. Node (Ω)294.21953514° ± 2.50e-06
Arg. of Perihelion (ω)155.75786447° ± 5.78e-06
Mean Anomaly (M)233.55893618° ± 3.30e-06
Mean Motion (n)0.2048505083°/day ± 8.08e-10
Perihelion dist (q)1.11761090 AU ± 1.83e-08
Aphelion dist (Q)4.58245858 AU ± 2.17e-08
Orbital Period4.81144173 yr ± 1.90e-08
Physical Parameters
H (abs. magnitude)18.48
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.230″
Uncertainty0
Orbit TypeAmor
MOID0.151225 AU
Observations Used493
Oppositions20
Arc Total1998-2023
First Observation Used1999-01-09
Last Observation Used2023-05-18
Observations (518)
Date Type RA Dec Mag Band Observatory
2017-12-15 09:41:11 C 02 54 19.51 +75 45 50.1 U T08
2017-12-15 10:04:42 C 02 54 38.47 +75 45 51.9 U T08
2017-12-15 10:06:02 C 02 54 39.57 +75 45 51.9 U T08
2017-12-15 10:19:27 C 02 54 50.41 +75 45 52.4 U T08
2017-12-17 11:59:24 C 03 40 13.10 +75 37 05.9 r P93
2017-12-17 12:04:01 C 03 40 17.19 +75 37 04.6 r P93
2017-12-17 12:06:20 C 03 40 19.26 +75 37 02.9 r P93
2017-12-17 12:08:38 C 03 40 21.32 +75 37 01.6 r P93
2017-12-17 12:13:15 C 03 40 25.33 +75 36 59.4 r P93
2017-12-17 12:20:10 C 03 40 31.72 +75 36 56.0 r P93
2017-12-23 10:32:21 C 05 47 48.90 +70 56 54.0 U T08
2017-12-23 10:34:20 C 05 47 50.25 +70 56 47.3 U T08
2017-12-23 10:48:32 C 05 48 00.03 +70 55 58.1 U T08
2017-12-23 11:13:18 C 05 48 17.09 +70 54 31.6 U T08
2017-12-23 22:59:47 C 05 56 54.04 +70 12 27.0 o B67
2017-12-23 23:09:04 C 05 57 00.23 +70 11 53.2 o B67
2017-12-23 23:18:22 C 05 57 06.41 +70 11 19.2 o B67
2017-12-27 16:59:46 C 06 49 29.03 +63 30 27.3 t 073
2017-12-27 18:00:04 C 06 49 56.70 +63 25 25.6 t 073
2017-12-27 20:59:09 C 06 51 15.52 +63 10 14.6 t 073
2017-12-27 22:01:12 C 06 51 42.00 +63 04 51.4 t 073
2017-12-28 06:11:07 C 06 55 23.71 +62 21 31.9 U 703
2017-12-28 06:18:51 C 06 55 26.79 +62 20 51.6 U 703
2017-12-28 06:26:36 C 06 55 29.91 +62 20 10.6 U 703
2017-12-28 06:34:20 C 06 55 32.97 +62 19 29.5 U 703
2017-12-28 23:30:31 C 07 02 38.90 +60 45 54.1 U Z80
2017-12-28 23:32:58 C 07 02 39.84 +60 45 41.0 U Z80
2017-12-28 23:35:24 C 07 02 40.72 +60 45 27.0 U Z80
2017-12-28 23:37:50 C 07 02 41.69 +60 45 13.5 U Z80
2017-12-28 23:40:17 C 07 02 42.57 +60 45 00.0 U Z80
2017-12-28 23:42:44 C 07 02 43.50 +60 44 46.4 U Z80
2017-12-28 23:45:10 C 07 02 44.45 +60 44 32.6 U Z80
2017-12-28 23:47:36 C 07 02 45.41 +60 44 18.9 U Z80
2017-12-29 12:01:46 C 07 07 28.52 +59 35 12.1 U T05
2017-12-29 12:04:24 C 07 07 29.42 +59 34 56.7 U T05
2017-12-29 12:27:54 C 07 07 37.43 +59 32 38.9 U T05
2017-12-29 12:34:29 C 07 07 39.68 +59 32 00.3 U T05
2017-12-30 04:25:58 C 07 13 35.98 +57 58 25.2 U 703
2017-12-30 04:41:44 C 07 13 41.36 +57 56 53.7 U 703
2017-12-30 04:49:36 C 07 13 43.92 +57 56 08.1 U 703
2017-12-31 20:37:55 C 07 26 21.66 +53 50 34.9 U K74
2017-12-31 20:41:37 C 07 26 22.69 +53 50 12.0 U K74
2017-12-31 20:51:22 C 07 26 25.34 +53 49 11.4 U K74
2017-12-31 20:55:18 C 07 26 26.41 +53 48 47.0 U K74
2018-01-01 18:27:38 C 07 32 21.39 +51 30 11.6 U G34
2018-01-01 18:31:50 C 07 32 22.48 +51 29 45.0 U G34
2018-01-01 18:36:03 C 07 32 23.58 +51 29 18.2 U G34
2018-01-01 18:40:14 C 07 32 24.67 +51 28 51.9 U G34
2018-01-03 22:22:46 C 07 44 19.05 +45 47 19.3 U Z80
2018-01-03 22:28:24 C 07 44 20.16 +45 46 42.0 U Z80