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
2017-12-21 17:25:41 S 01 22 54.85 +00 00 24.4 L C51
2017-12-21 20:34:10 S 01 23 23.44 -00 01 21.4 L C51
2017-12-21 23:42:41 S 01 23 52.13 -00 03 06.9 L C51
2017-12-22 02:51:11 S 01 24 20.88 -00 04 51.8 L C51
2017-12-22 04:32:15 C 01 24 35.71 -00 06 01.7 U 703
2017-12-22 04:40:28 C 01 24 36.94 -00 06 06.0 U 703
2017-12-22 04:56:57 C 01 24 39.46 -00 06 16.2 U 703
2017-12-22 05:59:40 S 01 24 49.71 -00 06 36.5 L C51
2017-12-22 09:08:11 S 01 25 18.62 -00 08 20.5 L C51
2017-12-22 10:42:26 S 01 25 33.10 -00 09 12.5 L C51
2017-12-22 12:16:41 S 01 25 47.60 -00 10 04.3 L C51
2017-12-22 13:50:56 S 01 26 02.12 -00 10 55.9 L C51
2017-12-22 15:25:11 S 01 26 16.666 -00 11 47.65 L C51
2017-12-22 16:59:26 S 01 26 31.22 -00 12 39.1 L C51
2017-12-22 20:07:56 S 01 27 00.39 -00 14 21.8 L C51
2017-12-22 21:42:11 S 01 27 15.01 -00 15 13.1 L C51
2017-12-22 23:16:26 S 01 27 29.63 -00 16 04.0 L C51
2017-12-23 00:50:41 S 01 27 44.278 -00 16 54.95 L C51
2017-12-23 02:24:57 S 01 27 58.95 -00 17 45.7 L C51
2017-12-23 03:40:02 C 01 28 10.37 -00 18 39.6 U 703
2017-12-23 03:47:38 C 01 28 11.51 -00 18 43.6 U 703
2017-12-23 03:55:16 C 01 28 12.64 -00 18 47.8 U 703
2017-12-23 03:59:11 S 01 28 13.63 -00 18 36.5 L C51
2017-12-23 04:02:52 C 01 28 13.79 -00 18 51.8 U 703
2017-12-23 05:33:26 S 01 28 28.34 -00 19 27.0 L C51
2017-12-23 07:07:41 S 01 28 43.06 -00 20 17.7 L C51
2017-12-23 08:41:56 S 01 28 57.80 -00 21 08.0 L C51
2017-12-23 11:50:27 S 01 29 27.35 -00 22 48.6 L C51
2017-12-23 14:58:56 S 01 29 56.96 -00 24 28.6 L C51
2017-12-23 18:07:26 S 01 30 26.64 -00 26 08.1 L C51
2017-12-23 21:15:57 S 01 30 56.42 -00 27 47.2 L C51
2017-12-24 00:24:27 S 01 31 26.25 -00 29 26.0 L C51
2017-12-24 03:32:56 S 01 31 56.15 -00 31 04.2 L C51
2017-12-24 06:41:27 S 01 32 26.124 -00 32 42.00 L C51
2017-12-24 09:49:57 S 01 32 56.172 -00 34 19.42 L C51
2017-12-24 12:58:27 S 01 33 26.292 -00 35 56.40 L C51
2017-12-24 16:06:57 S 01 33 56.482 -00 37 32.88 L C51
2017-12-24 19:15:27 S 01 34 26.755 -00 39 08.96 L C51
2017-12-25 06:38:18 C 01 36 16.68 -00 45 01.3 U T08
2017-12-25 06:48:40 C 01 36 18.28 -00 45 06.4 U T08
2017-12-25 06:58:58 C 01 36 19.88 -00 45 11.7 U T08
2017-12-25 07:09:18 C 01 36 21.49 -00 45 16.9 U T08
2017-12-29 07:24:30 C 01 52 29.94 -01 29 45.7 U T08
2017-12-29 07:35:57 C 01 52 31.83 -01 29 50.5 U T08
2017-12-29 07:47:34 C 01 52 33.75 -01 29 55.8 U T08
2017-12-29 07:59:22 C 01 52 35.73 -01 30 00.9 U T08
2017-12-29 20:12:08 C 01 54 43.77 -01 35 14.2 q Z36
2017-12-29 20:18:03 C 01 54 44.72 -01 35 16.7 q Z57
2017-12-29 20:22:24 C 01 54 45.52 -01 35 18.3 q Z57
2017-12-29 20:22:47 C 01 54 45.56 -01 35 18.7 q Z36