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
1998-11-11 04:16:21 C 22 08 44.81 +00 20 05.5 658
1998-11-11 04:20:00 C 22 08 44.94 +00 20 04.5 658
1998-11-11 04:25:09 C 22 08 45.14 +00 20 03.4 658
1998-11-12 11:30:29 C 22 09 53.14 +00 12 42.2 360
1998-11-12 11:36:29 C 22 09 53.30 +00 12 41.1 360
1998-11-12 11:43:45 C 22 09 53.59 +00 12 38.9 360
1998-11-16 03:15:13 C 22 13 29.60 -00 05 44.0 z 711
1998-11-17 03:19:51 C 22 14 35.18 -00 10 11.4 z 711
1998-11-17 03:38:50 C 22 14 36.02 -00 10 14.7 z 711
1998-11-24 17:53:20 C 22 24 17.91 -00 35 20.0 557
1998-11-24 17:57:06 C 22 24 18.14 -00 35 20.0 557
1998-12-08 11:14:34 C 22 47 44.09 -00 41 54.4 b 426
1998-12-08 11:36:01 C 22 47 45.90 -00 41 52.9 b 426
1998-12-17 10:10:44 C 23 06 49.95 -00 20 43.3 360
1998-12-17 10:17:30 C 23 06 50.58 -00 20 41.9 360
1998-12-17 10:23:14 C 23 06 51.14 -00 20 41.4 360
1998-12-19 03:29:36 C 23 10 49.82 -00 14 24.2 658
1998-12-19 03:49:28 C 23 10 51.86 -00 14 20.4 658
1998-12-19 03:55:04 C 23 10 52.34 -00 14 20.6 658
1999-01-03 02:08:19 C 23 49 47.21 +01 08 42.5 658
1999-01-03 02:11:25 C 23 49 47.63 +01 08 43.5 658
1999-01-03 02:15:51 C 23 49 48.22 +01 08 45.0 658
1999-01-13 02:02:23 C 00 19 54.62 +02 29 00.3 c 699
1999-01-13 02:24:22 C 00 19 57.45 +02 29 08.4 c 699
1999-01-13 02:49:38 C 00 20 00.79 +02 29 17.2 c 699
1999-01-16 10:32:57 C 00 30 43.84 +02 59 47.8 422
1999-01-16 10:34:37 C 00 30 44.13 +02 59 47.4 422
1999-05-15 03:40:29 C 08 18 45.11 +10 22 21.6 i 693
1999-05-15 03:43:24 C 08 18 45.50 +10 22 20.4 i 693
1999-05-15 03:46:14 C 08 18 45.89 +10 22 19.7 i 693
2002-06-08 06:24:03 C 20 05 35.67 -10 59 18.1 c 809
2002-06-08 06:37:29 C 20 05 35.40 -10 59 17.4 c 809
2002-06-08 06:50:44 C 20 05 35.12 -10 59 16.6 c 809
2002-07-09 12:12:22 C 19 44 01.52 -10 54 49.1 c 568
2002-07-09 12:17:19 C 19 44 01.33 -10 54 49.7 c 568
2002-07-09 12:23:05 C 19 44 01.12 -10 54 49.8 c 568
2002-07-09 12:27:51 C 19 44 00.95 -10 54 50.0 c 568
2003-08-28 09:21:53 C 04 29 28.50 +28 46 23.8 18.9 c 704
2003-08-28 09:43:13 C 04 29 32.12 +28 46 26.8 19.0 c 704
2003-08-28 10:06:10 C 04 29 36.07 +28 46 31.1 19.1 c 704
2003-08-28 10:26:49 C 04 29 39.66 +28 46 33.8 19.2 c 704
2003-08-28 10:47:05 C 04 29 43.06 +28 46 37.7 19.4 c 704
2003-09-07 09:38:20 C 05 13 02.00 +28 54 42.4 19.1 c 704
2003-09-07 09:58:16 C 05 13 05.81 +28 54 41.0 19.8 c 704
2003-09-07 10:18:18 C 05 13 09.53 +28 54 40.2 19.6 c 704
2003-09-27 10:22:44 C 06 47 50.75 +25 48 02.8 18.2 c 704
2003-09-27 10:40:50 C 06 47 54.39 +25 47 50.2 18.8 c 704
2003-09-27 11:21:18 C 06 48 02.61 +25 47 20.8 19.7 c 704
2003-09-27 11:40:21 C 06 48 06.18 +25 47 08.6 18.8 c 704
2003-09-29 10:37:15 C 06 57 30.83 +25 12 39.5 19.3 c 704