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
1998-08-18 13:30:57 C 23 00 48.41 +11 07 37.8 o 566
1998-08-18 14:16:21 C 23 00 46.86 +11 07 38.8 o 566
1998-08-24 08:55:10 C 22 55 51.96 +11 07 20.1 19.4 a 704
1998-08-24 09:18:50 C 22 55 50.92 +11 07 20.2 20.0 a 704
1998-08-24 09:42:18 C 22 55 50.00 +11 07 20.4 20.4 a 704
1998-08-24 10:29:12 C 22 55 47.98 +11 07 16.2 19.6 a 704
1998-09-19 03:47:00 C 22 26 20.26 +08 57 51.8 18.9 a 704
1998-09-19 04:17:01 C 22 26 18.49 +08 57 38.6 19.4 a 704
1998-09-19 05:16:54 C 22 26 15.42 +08 57 16.5 19.2 a 704
1998-09-19 05:47:04 C 22 26 13.88 +08 57 07.7 19.6 a 704
1998-09-19 22:56:26 C 22 25 22.17 +08 50 36.4 046
1998-09-19 22:59:00 C 22 25 22.04 +08 50 35.4 046
1998-09-19 23:01:22 C 22 25 21.92 +08 50 34.5 046
1998-09-19 23:05:47 C 22 25 21.67 +08 50 32.7 046
1998-09-19 23:08:00 C 22 25 21.60 +08 50 32.0 046
1998-09-20 12:43:39 C 22 24 41.18 +08 45 29.9 b 426
1998-09-20 12:56:14 C 22 24 40.57 +08 45 25.9 b 426
1998-09-20 13:12:39 C 22 24 39.72 +08 45 20.0 b 426
1998-09-20 13:18:36 C 22 24 39.37 +08 45 17.3 b 426
1998-09-20 23:26:43 C 22 24 09.04 +08 41 10.1 557
1998-09-20 23:30:03 C 22 24 08.84 +08 41 08.4 557
1998-09-20 23:33:25 C 22 24 08.69 +08 41 07.8 557
1998-09-21 06:09:43 C 22 23 49.19 +08 38 33.5 19.3 a 704
1998-09-21 06:41:50 C 22 23 47.55 +08 38 22.5 18.8 a 704
1998-09-21 07:13:51 C 22 23 46.01 +08 38 08.1 19.8 a 704
1998-09-21 07:45:46 C 22 23 44.18 +08 37 57.6 20.0 a 704
1998-09-21 08:30:29 C 22 23 42.02 +08 37 39.9 19.5 a 704
1998-09-21 21:29:34 C 22 23 04.11 +08 32 29.0 557
1998-09-21 21:33:16 C 22 23 03.92 +08 32 27.4 557
1998-09-23 03:01:27 C 22 21 38.43 +08 20 33.9 19.2 a 704
1998-09-23 03:35:08 C 22 21 36.78 +08 20 20.8 19.4 a 704
1998-09-23 04:08:45 C 22 21 34.96 +08 20 07.7 19.9 a 704
1998-09-23 04:43:45 C 22 21 33.29 +08 19 52.3 20.8 a 704
1998-10-01 11:14:41 C 22 12 46.07 +06 52 45.9 z 402
1998-10-01 11:16:41 C 22 12 46.03 +06 52 44.7 z 402
1998-10-01 11:18:41 C 22 12 45.95 +06 52 44.0 z 402
1998-10-12 18:39:04 C 22 04 14.25 +04 45 01.6 557
1998-10-12 18:45:24 C 22 04 14.07 +04 44 58.0 557
1998-10-12 18:48:29 C 22 04 14.02 +04 44 57.0 557
1998-10-13 11:56:11 C 22 03 51.58 +04 37 08.8 422
1998-10-13 11:57:58 C 22 03 51.60 +04 37 08.2 422
1998-10-13 12:00:59 C 22 03 51.49 +04 37 06.9 422
1998-10-21 11:42:59 C 22 01 17.41 +03 10 47.5 422
1998-10-21 11:47:18 C 22 01 17.45 +03 10 46.2 422
1998-10-22 11:12:21 C 22 01 11.11 +03 00 36.6 z 402
1998-10-22 11:14:21 C 22 01 11.08 +03 00 35.9 z 402
1998-10-22 11:16:21 C 22 01 11.10 +03 00 35.0 z 402
1998-10-25 10:51:29 C 22 01 08.22 +02 31 05.1 360
1998-10-25 10:58:15 C 22 01 08.21 +02 31 01.9 360
1998-10-25 11:05:00 C 22 01 08.19 +02 30 59.6 360