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
2018-01-17 13:12:00 C 08 20 21.33 +13 59 09.2 U T05
2018-01-17 13:23:42 C 08 20 21.82 +13 58 18.3 U T05
2018-01-18 00:34:32 C 08 20 59.50 +13 10 21.6 q 160
2018-01-18 00:36:35 C 08 20 59.58 +13 10 13.0 q 160
2018-01-18 00:38:37 C 08 20 59.67 +13 10 04.4 q 160
2018-01-18 12:03:48 C 08 21 34.48 +12 23 10.9 U T08
2018-01-18 12:18:29 C 08 21 34.99 +12 22 10.7 U T08
2018-01-18 12:33:06 C 08 21 35.51 +12 21 10.8 U T08
2018-01-18 12:47:38 C 08 21 36.02 +12 20 11.2 U T08
2018-01-19 01:20:29 C 08 22 14.59 +11 29 33.3 U J27
2018-01-19 01:22:31 C 08 22 14.67 +11 29 25.3 U J27
2018-01-19 01:24:54 C 08 22 14.75 +11 29 16.1 U J27
2018-01-19 06:33:30 C 08 22 31.17 +11 09 13.4 U 703
2018-01-19 06:41:04 C 08 22 31.42 +11 08 43.8 U 703
2018-01-19 06:48:40 C 08 22 31.69 +11 08 14.5 U 703
2018-01-19 06:56:15 C 08 22 31.94 +11 07 45.1 U 703
2018-01-19 11:44:24 C 08 22 43.87 +10 49 23.4 U T08
2018-01-19 12:08:37 C 08 22 44.63 +10 47 49.9 U T08
2018-01-19 12:15:11 C 08 22 44.84 +10 47 24.6 U T08
2018-01-19 12:35:05 C 08 22 45.48 +10 46 08.0 U T08
2018-01-20 11:58:38 C 08 23 49.144 +09 19 06.78 U F51
2018-01-20 12:16:24 C 08 23 49.655 +09 18 02.53 U F51
2018-01-20 12:34:00 C 08 23 50.170 +09 16 58.65 U F51
2018-01-20 12:51:39 C 08 23 50.696 +09 15 54.88 U F51
2018-01-21 01:25:26 C 08 24 26.08 +08 32 05.9 q Y00
2018-01-21 01:42:14 C 08 24 26.55 +08 31 07.8 q Y00
2018-01-21 01:59:13 C 08 24 27.03 +08 30 09.0 q Y00
2018-01-22 01:27:20 C 08 25 21.61 +07 10 14.1 U J27
2018-01-22 01:32:07 C 08 25 21.74 +07 09 58.5 U J27
2018-01-22 01:35:43 C 08 25 21.84 +07 09 46.8 U J27
2018-01-24 04:31:16 C 08 27 14.70 +04 35 04.4 U 703
2018-01-24 04:38:55 C 08 27 14.90 +04 34 42.9 U 703
2018-01-24 04:46:35 C 08 27 15.08 +04 34 21.6 U 703
2018-01-24 04:54:14 C 08 27 15.27 +04 33 59.8 U 703
2018-01-27 05:10:38 C 08 29 28.62 +01 29 31.3 U 703
2018-01-27 05:18:10 C 08 29 28.73 +01 29 13.8 U 703
2018-01-27 05:25:41 C 08 29 28.89 +01 28 56.9 U 703
2018-01-27 05:33:12 C 08 29 29.04 +01 28 39.5 U 703
2018-01-27 08:24:06 C 08 29 32.01 +01 22 09.5 U G96
2018-01-27 08:30:54 C 08 29 32.12 +01 21 54.0 U G96
2018-01-27 08:37:43 C 08 29 32.25 +01 21 38.7 U G96
2018-01-27 08:44:32 C 08 29 32.37 +01 21 23.3 U G96
2018-01-31 23:45:04 C 08 32 23.34 -02 13 25.6 q C23
2018-01-31 23:47:12 C 08 32 23.38 -02 13 29.6 q C23
2018-01-31 23:50:27 C 08 32 23.42 -02 13 34.3 q C23
2018-01-31 23:53:41 C 08 32 23.49 -02 13 39.6 q C23
2018-02-03 04:03:25 C 08 33 34.95 -03 31 09.0 o W92
2018-02-03 04:18:53 C 08 33 35.17 -03 31 30.3 o W92
2018-02-03 04:34:19 C 08 33 35.34 -03 31 51.4 o W92
2018-02-03 11:37:24 C 08 33 43.86 -03 42 00.1 U T08