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
2017-11-30 20:56:52 C 00 25 34.30 +69 34 47.1 V C95
2017-11-30 22:01:29 C 00 25 41.96 +69 36 01.4 V C95
2017-11-30 23:05:34 C 00 25 50.05 +69 37 12.5 V C95
2017-12-01 00:09:22 C 00 25 58.41 +69 38 22.6 V C95
2017-12-01 01:13:07 C 00 26 07.27 +69 39 32.1 V C95
2017-12-02 03:36:03 C 00 30 16.97 +70 12 07.0 u H21
2017-12-02 03:38:20 C 00 30 17.30 +70 12 09.9 u H21
2017-12-02 03:40:24 C 00 30 17.59 +70 12 12.1 u H21
2017-12-02 03:42:28 C 00 30 17.94 +70 12 14.6 u H21
2017-12-02 03:44:32 C 00 30 18.24 +70 12 16.9 u H21
2017-12-02 03:46:36 C 00 30 18.54 +70 12 19.2 u H21
2017-12-02 03:48:41 C 00 30 18.80 +70 12 21.8 u H21
2017-12-02 03:50:45 C 00 30 19.10 +70 12 24.2 u H21
2017-12-02 03:52:49 C 00 30 19.41 +70 12 26.6 u H21
2017-12-02 03:54:53 C 00 30 19.70 +70 12 29.0 u H21
2017-12-02 03:56:57 C 00 30 20.01 +70 12 31.3 u H21
2017-12-02 03:59:01 C 00 30 20.31 +70 12 33.7 u H21
2017-12-02 04:01:05 C 00 30 20.64 +70 12 36.0 u H21
2017-12-02 04:03:09 C 00 30 20.91 +70 12 38.3 u H21
2017-12-02 04:05:49 C 00 30 21.34 +70 12 41.5 u H21
2017-12-04 19:51:37 C 00 43 35.30 +71 32 38.5 o Z22
2017-12-04 20:07:26 C 00 43 38.57 +71 32 56.7 o Z22
2017-12-04 20:09:02 C 00 43 38.84 +71 33 00.4 o Z22
2017-12-04 22:00:36 C 00 44 00.92 +71 35 05.6 V C95
2017-12-04 22:33:21 C 00 44 08.39 +71 35 44.1 V C95
2017-12-04 23:06:06 C 00 44 16.01 +71 36 22.2 V C95
2017-12-05 01:49:41 C 00 44 56.24 +71 39 28.3 V C95
2017-12-05 02:17:45 C 00 45 03.39 +71 40 00.9 V C95
2017-12-05 02:40:31 C 00 45 09.48 +71 40 26.4 V C95
2017-12-05 18:34:16 C 00 49 32.97 +72 01 15.0 V C95
2017-12-05 19:08:31 C 00 49 41.54 +72 01 59.1 V C95
2017-12-05 19:42:47 C 00 49 50.16 +72 02 42.8 V C95
2017-12-05 20:51:19 C 00 50 07.48 +72 04 07.9 V C95
2017-12-05 21:24:49 C 00 50 16.09 +72 04 48.5 V C95
2017-12-05 22:00:40 C 00 50 25.37 +72 05 31.3 V C95
2017-12-05 22:34:07 C 00 50 34.18 +72 06 10.6 V C95
2017-12-05 23:09:29 C 00 50 43.63 +72 06 51.7 V C95
2017-12-11 03:33:48 C 01 41 55.42 +74 35 54.6 q H45
2017-12-11 03:35:57 C 01 41 56.56 +74 35 56.8 q H45
2017-12-11 03:38:00 C 01 41 57.62 +74 35 58.8 q H45
2017-12-11 03:39:34 C 01 41 58.44 +74 36 00.5 q H45
2017-12-11 03:40:37 C 01 41 58.94 +74 36 01.4 q H45
2017-12-11 03:42:07 C 01 41 59.75 +74 36 03.0 q H45
2017-12-12 21:45:06 C 02 08 03.37 +75 14 33.5 U L23
2017-12-12 21:48:13 C 02 08 05.39 +75 14 35.5 U L23
2017-12-12 21:51:19 C 02 08 07.48 +75 14 37.3 U L23
2017-12-15 08:44:05 C 02 53 33.96 +75 45 44.0 U T08
2017-12-15 08:46:03 C 02 53 35.49 +75 45 44.5 U T08
2017-12-15 09:12:25 C 02 53 56.49 +75 45 47.5 U T08
2017-12-15 09:25:48 C 02 54 07.19 +75 45 48.9 U T08