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
2018-01-03 22:34:03 C 07 44 21.13 +45 46 04.6 U Z80
2018-01-04 12:04:27 C 07 46 57.81 +44 16 17.7 U T08
2018-01-04 12:19:09 C 07 47 00.21 +44 14 38.4 U T08
2018-01-04 12:30:29 C 07 47 02.06 +44 13 21.4 U T08
2018-01-04 19:13:12 C 07 48 24.86 +43 27 08.9 U Z80
2018-01-04 19:15:05 C 07 48 25.22 +43 26 56.3 U Z80
2018-01-04 19:16:53 C 07 48 25.47 +43 26 45.3 U Z80
2018-01-05 07:35:40 C 07 50 35.94 +42 04 59.9 U 703
2018-01-05 07:43:39 C 07 50 37.10 +42 04 06.9 U 703
2018-01-05 07:51:48 C 07 50 38.37 +42 03 12.0 U 703
2018-01-05 07:59:53 C 07 50 39.59 +42 02 17.9 U 703
2018-01-05 22:58:03 C 07 53 13.72 +40 21 34.8 q C23
2018-01-05 23:02:56 C 07 53 14.46 +40 21 02.2 q C23
2018-01-05 23:07:50 C 07 53 15.18 +40 20 29.6 q C23
2018-01-05 23:12:44 C 07 53 15.89 +40 19 57.3 q C23
2018-01-05 23:17:38 C 07 53 16.61 +40 19 24.8 q C23
2018-01-05 23:22:31 C 07 53 17.33 +40 18 52.4 q C23
2018-01-05 23:28:52 C 07 53 18.27 +40 18 10.0 q C23
2018-01-06 10:58:07 C 07 55 08.049 +39 02 14.14 U F51
2018-01-06 11:36:50 C 07 55 13.057 +38 57 56.63 U F51
2018-01-07 02:27:46 C 07 57 32.39 +37 18 57.5 q W33
2018-01-07 02:50:15 C 07 57 35.38 +37 16 32.2 q W33
2018-01-07 03:13:01 C 07 57 38.35 +37 14 04.8 q W33
2018-01-07 11:10:24 C 07 58 43.037 +36 22 15.81 U F51
2018-01-07 11:25:40 C 07 58 44.790 +36 20 35.55 U F51
2018-01-07 11:26:35 C 07 58 44.901 +36 20 29.62 U F51
2018-01-07 11:41:51 C 07 58 46.654 +36 18 49.26 U F51
2018-01-07 11:42:46 C 07 58 46.763 +36 18 43.27 U F51
2018-01-07 18:16:21 C 07 59 45.75 +35 34 41.6 q C23
2018-01-07 18:19:49 C 07 59 46.21 +35 34 19.4 q C23
2018-01-07 18:22:42 C 07 59 46.61 +35 34 00.8 q C23
2018-01-07 18:25:36 C 07 59 47.01 +35 33 42.3 q C23
2018-01-07 20:21:40 C 08 00 02.48 +35 21 16.1 U Z80
2018-01-07 20:23:55 C 08 00 02.73 +35 21 01.8 U Z80
2018-01-07 20:26:10 C 08 00 03.07 +35 20 47.7 U Z80
2018-01-07 20:28:25 C 08 00 03.36 +35 20 33.6 U Z80
2018-01-07 20:30:40 C 08 00 03.63 +35 20 18.5 U Z80
2018-01-07 20:32:55 C 08 00 03.87 +35 20 05.0 U Z80
2018-01-07 20:35:10 C 08 00 04.20 +35 19 50.1 U Z80
2018-01-07 20:37:25 C 08 00 04.46 +35 19 35.3 U Z80
2018-01-07 20:39:40 C 08 00 04.75 +35 19 20.9 U Z80
2018-01-07 20:41:55 C 08 00 05.07 +35 19 07.0 U Z80
2018-01-08 13:53:13 C 08 02 12.37 +33 28 50.7 U T08
2018-01-08 14:08:16 C 08 02 13.98 +33 27 12.7 U T08
2018-01-08 14:27:23 C 08 02 16.06 +33 25 08.0 U T08
2018-01-08 14:54:52 C 08 02 19.10 +33 22 08.4 U T08
2018-01-09 08:34:16 C 08 04 30.92 +31 30 11.1 U G96
2018-01-09 08:41:52 C 08 04 31.65 +31 29 22.5 U G96
2018-01-09 08:49:26 C 08 04 32.36 +31 28 35.3 U G96
2018-01-09 08:57:01 C 08 04 33.09 +31 27 47.6 U G96