333888 (1998 ST4)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5911401060 ± 7.81e-09
Semi-major axis (a)2.8361713679 AU ± 4.49e-09
Inclination (i)9.14717990° ± 1.43e-06
Long. of Asc. Node (Ω)238.61081131° ± 5.90e-06
Arg. of Perihelion (ω)207.96148352° ± 6.56e-06
Mean Anomaly (M)235.43022484° ± 2.02e-06
Mean Motion (n)0.2063543240°/day ± 4.90e-10
Perihelion dist (q)1.15959672 AU ± 2.22e-08
Aphelion dist (Q)4.51274601 AU ± 2.33e-08
Orbital Period4.77637815 yr ± 1.13e-08
Physical Parameters
H (abs. magnitude)16.81
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.197″
Uncertainty0
Orbit TypeAmor
MOID0.187482 AU
Observations Used835
Oppositions20
Arc Total1998-2023
First Observation Used1998-08-18
Last Observation Used2023-05-24
Observations (1116)
Date Type RA Dec Mag Band Observatory
2023-03-20 07:31:59 C 12 47 54.965 -18 57 00.32 V W68
2023-04-02 04:50:21 C 12 33 06.145 -16 31 42.13 V 703
2023-04-02 05:05:53 C 12 33 05.512 -16 31 32.12 V 703
2023-04-02 05:13:38 C 12 33 05.220 -16 31 29.42 V 703
2023-04-19 06:23:25 C 12 17 41.838 -13 10 11.21 V G96
2023-04-19 06:30:53 C 12 17 41.633 -13 10 07.82 V G96
2023-04-19 06:38:20 C 12 17 41.413 -13 10 04.01 V G96
2023-04-19 06:45:49 C 12 17 41.183 -13 10 00.73 V G96
2023-04-25 07:10:04 C 12 14 07.275 -12 06 40.78 X F52
2023-04-25 07:24:42 C 12 14 06.943 -12 06 34.78 X F52
2023-04-25 07:39:19 C 12 14 06.617 -12 06 28.77 X F52
2023-04-25 07:53:58 C 12 14 06.286 -12 06 22.60 X F52
2023-05-24 05:07:39 C 12 11 16.768 -08 47 58.92 V G96
2023-05-24 05:15:57 C 12 11 16.843 -08 47 58.06 V G96
2023-05-24 05:24:16 C 12 11 16.926 -08 47 56.65 V G96
2023-05-24 05:32:33 C 12 11 16.998 -08 47 55.07 V G96