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
1999-02-04 11:24:13 C 05 50 42.40 +12 01 22.0 z 402
1999-02-09 11:55:30 C 06 15 58.99 +08 40 24.2 360
1999-02-09 11:59:00 C 06 15 59.63 +08 40 18.7 360
1999-02-09 12:02:00 C 06 16 00.20 +08 40 14.4 360
1999-02-19 05:15:12 C 06 55 18.22 +04 03 03.1 z 711
1999-02-19 05:23:29 C 06 55 19.40 +04 02 55.2 z 711
1999-02-19 10:59:57 C 06 56 09.69 +03 57 46.5 z 402
1999-02-19 11:01:45 C 06 56 09.95 +03 57 44.7 z 402
1999-02-19 11:03:34 C 06 56 10.20 +03 57 43.1 z 402
1999-02-20 05:18:52 C 06 58 48.36 +03 41 30.6 z 711
1999-02-20 05:27:22 C 06 58 49.49 +03 41 23.0 z 711
1999-02-25 05:05:32 C 07 15 05.24 +02 09 43.8 a 658
1999-02-25 05:08:17 C 07 15 05.51 +02 09 41.7 a 658
1999-02-25 05:12:28 C 07 15 06.04 +02 09 38.9 a 658
1999-03-20 05:19:48 C 08 14 05.32 -01 23 17.2 658
1999-03-20 05:24:40 C 08 14 05.81 -01 23 18.5 658
2017-08-15 11:10:32 C 00 52 55.375 +24 58 22.22 L F51
2017-08-15 11:27:19 C 00 52 55.870 +24 58 36.56 L F51
2017-08-15 12:01:10 C 00 52 56.854 +24 59 05.22 L F51
2017-08-17 23:57:35 C 00 54 47.145 +25 49 49.74 U J04
2017-08-18 00:07:06 C 00 54 47.413 +25 49 57.72 U J04
2017-08-18 00:16:37 C 00 54 47.679 +25 50 06.03 U J04
2017-08-18 01:39:17 C 00 54 49.75 +25 51 17.1 d L01
2017-08-18 01:57:39 C 00 54 50.25 +25 51 31.9 d L01
2017-09-01 10:39:12 C 01 03 12.450 +31 04 45.14 L F51
2017-09-01 10:55:04 C 01 03 12.697 +31 05 00.66 L F51
2017-09-01 11:11:00 C 01 03 12.934 +31 05 16.11 L F51
2017-09-01 11:26:55 C 01 03 13.187 +31 05 31.54 L F51
2017-09-30 07:07:24 C 01 03 30.06 +43 23 43.4 q 703
2017-09-30 07:15:22 C 01 03 29.98 +43 23 53.8 q 703
2017-09-30 07:23:53 C 01 03 29.74 +43 24 03.2 q 703
2017-09-30 11:20:57 C 01 03 24.48 +43 28 38.8 L T08
2017-09-30 11:38:19 C 01 03 23.92 +43 28 58.6 L T08
2017-09-30 11:50:23 C 01 03 23.64 +43 29 11.1 L T08
2017-09-30 11:52:35 C 01 03 23.48 +43 29 14.2 L T08
2017-09-30 11:59:38 C 01 03 23.38 +43 29 20.9 L T08
2017-09-30 12:01:41 C 01 03 23.30 +43 29 23.0 L T08
2017-09-30 12:16:54 C 01 03 22.85 +43 29 41.7 L T08
2017-10-03 06:39:52 C 01 01 48.83 +44 45 57.9 q 703
2017-10-03 06:47:19 C 01 01 48.57 +44 46 06.7 q 703
2017-10-03 06:54:57 C 01 01 48.45 +44 46 15.9 q 703
2017-10-03 07:02:53 C 01 01 48.13 +44 46 25.5 q 703
2017-10-03 08:20:38 C 01 01 45.66 +44 47 54.3 q G96
2017-10-03 08:27:39 C 01 01 45.45 +44 48 02.0 q G96
2017-10-03 08:34:40 C 01 01 45.22 +44 48 10.2 q G96
2017-10-03 08:41:37 C 01 01 44.99 +44 48 18.3 q G96
2017-10-09 06:53:16 C 00 57 16.43 +47 32 25.0 U 703
2017-10-09 07:01:26 C 00 57 16.07 +47 32 33.8 U 703
2017-10-09 07:10:06 C 00 57 15.62 +47 32 44.4 U 703
2017-10-09 07:19:01 C 00 57 15.30 +47 32 54.6 U 703