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
1999-01-15 18:57:05 C 03 26 27.58 +29 41 46.7 z 151
1999-01-15 20:33:32 C 03 27 01.99 +29 38 21.0 118
1999-01-15 20:36:05 C 03 27 02.89 +29 38 15.5 118
1999-01-15 20:42:12 C 03 27 05.13 +29 38 02.3 118
1999-01-16 20:37:48 C 03 35 54.39 +28 46 33.8 118
1999-01-16 20:40:37 C 03 35 55.42 +28 46 27.6 118
1999-01-16 20:47:06 C 03 35 57.75 +28 46 13.2 118
1999-01-17 18:50:30 C 03 44 01.84 +27 57 17.5 118
1999-01-17 18:55:09 C 03 44 03.50 +27 57 06.9 118
1999-01-17 19:33:34 C 03 44 17.36 +27 55 40.6 z 151
1999-01-17 19:39:48 C 03 44 19.52 +27 55 26.8 z 151
1999-01-17 19:45:53 C 03 44 21.82 +27 55 13.1 z 151
1999-01-17 19:49:49 C 03 44 23.14 +27 55 04.3 z 151
1999-01-18 13:02:40 C 03 50 34.90 +27 16 02.1 z 402
1999-01-18 13:04:58 C 03 50 35.74 +27 15 56.8 z 402
1999-01-18 13:07:16 C 03 50 36.55 +27 15 51.3 z 402
1999-01-20 19:18:27 C 04 09 44.74 +25 08 42.0 540
1999-01-20 19:20:15 C 04 09 45.39 +25 08 38.5 540
1999-01-20 19:21:57 C 04 09 45.95 +25 08 34.8 540
1999-01-20 19:23:49 C 04 09 46.63 +25 08 30.0 540
1999-01-21 12:47:30 C 04 15 43.86 +24 27 00.5 360
1999-01-21 12:49:59 C 04 15 44.68 +24 26 54.4 360
1999-01-21 12:52:30 C 04 15 45.51 +24 26 48.5 360
1999-01-21 18:42:33 C 04 17 45.91 +24 12 37.3 z 151
1999-01-21 18:54:12 C 04 17 49.98 +24 12 08.3 z 151
1999-01-21 18:56:52 C 04 17 50.66 +24 12 02.8 z 151
1999-01-21 19:05:49 C 04 17 53.67 +24 11 41.4 z 151
1999-01-21 19:06:27 C 04 17 53.62 +24 11 39.6 046
1999-01-21 19:07:28 C 04 17 53.96 +24 11 37.0 046
1999-01-21 19:08:23 C 04 17 54.25 +24 11 35.0 046
1999-01-21 19:09:19 C 04 17 54.57 +24 11 33.0 046
1999-01-21 19:40:55 C 04 18 05.17 +24 10 18.3 z 587
1999-01-21 19:44:30 C 04 18 06.33 +24 10 09.9 z 587
1999-01-21 21:41:16 C 04 18 44.18 +24 05 27.5 z 071
1999-01-21 21:44:30 C 04 18 45.29 +24 05 20.2 z 071
1999-01-21 21:47:46 C 04 18 46.55 +24 05 10.6 z 071
1999-01-21 21:51:02 C 04 18 47.32 +24 05 05.1 z 071
1999-01-21 21:54:17 C 04 18 48.63 +24 04 56.7 z 071
1999-01-22 21:30:46 C 04 26 41.76 +23 07 57.3 z 071
1999-01-22 21:36:20 C 04 26 43.94 +23 07 44.8 z 071
1999-01-22 21:41:57 C 04 26 45.47 +23 07 34.3 z 071
1999-01-23 19:19:05 C 04 33 51.42 +22 15 15.1 540
1999-01-23 19:23:00 C 04 33 52.68 +22 15 05.9 540
1999-01-23 19:25:01 C 04 33 53.31 +22 15 00.6 540
1999-01-23 19:27:00 C 04 33 53.95 +22 14 55.8 540
1999-01-24 04:12:31 C 04 36 43.24 +21 53 47.6 a 658
1999-01-24 04:14:26 C 04 36 43.87 +21 53 43.4 a 658
1999-01-24 04:16:46 C 04 36 44.57 +21 53 37.4 a 658
1999-02-04 11:20:13 C 05 50 41.53 +12 01 29.5 z 402
1999-02-04 11:22:13 C 05 50 41.98 +12 01 25.6 z 402