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
2004-03-31 05:43:04 C 11 29 04.24 -13 07 02.6 19.0 c 704
2004-03-31 05:57:45 C 11 29 03.88 -13 06 55.6 19.5 c 704
2004-03-31 06:12:35 C 11 29 03.36 -13 06 45.9 19.4 c 704
2004-03-31 06:27:20 C 11 29 02.93 -13 06 37.0 19.2 c 704
2004-04-16 14:50:31 C 11 22 13.47 -09 37 58.8 r E17
2004-04-16 14:55:08 C 11 22 13.49 -09 37 56.5 r E17
2004-04-16 14:59:28 C 11 22 13.45 -09 37 54.1 r E17
2005-06-10 09:36:14 C 16 03 57.88 -19 08 25.1 c 568
2005-06-10 10:14:10 C 16 03 56.61 -19 08 20.2 c 568
2005-06-10 10:52:31 C 16 03 55.33 -19 08 15.5 c 568
2007-06-16 08:07:09 C 20 51 22.63 -06 50 33.5 22.5 o H55
2007-06-16 08:30:07 C 20 51 22.26 -06 50 32.4 22.3 o H55
2007-06-16 08:52:51 C 20 51 21.90 -06 50 30.2 22.3 o H55
2009-04-24 06:31:52 C 13 58 12.39 -18 40 38.6 r G96
2009-04-24 06:41:37 C 13 58 12.00 -18 40 34.7 r G96
2009-04-24 06:51:27 C 13 58 11.53 -18 40 31.6 r G96
2009-04-24 07:01:20 C 13 58 11.10 -18 40 27.9 r G96
2012-08-06 22:02:59 C 21 34 10.92 +00 54 18.2 u 204
2012-08-06 22:39:06 C 21 34 09.39 +00 54 14.5 u 204
2012-08-07 08:29:43 c 21 33 44.295 +00 53 16.23 L F51
2012-08-07 08:43:36 c 21 33 43.678 +00 53 14.81 L F51
2012-08-07 11:24:32 c 21 33 36.578 +00 52 58.25 L F51
2012-08-07 11:39:59 c 21 33 35.901 +00 52 56.57 L F51
2012-08-10 09:33:58 c 21 30 33.053 +00 44 51.02 L F51
2012-08-10 09:50:08 c 21 30 32.290 +00 44 49.24 L F51
2012-12-07 05:07:41 C 21 34 10.178 -06 00 35.22 L F51
2012-12-07 05:14:37 C 21 34 10.626 -06 00 34.09 L F51
2012-12-07 05:21:31 C 21 34 11.076 -06 00 32.97 L F51
2014-05-23 07:40:35 C 14 56 20.229 -18 41 26.79 L F51
2014-05-23 07:56:48 C 14 56 19.626 -18 41 23.14 L F51
2014-05-23 08:13:02 C 14 56 19.050 -18 41 19.60 L F51
2017-08-15 11:02:08 C 00 31 13.600 +19 22 24.85 L F51
2017-08-15 11:18:58 C 00 31 13.908 +19 22 31.78 L F51
2017-08-15 11:35:46 C 00 31 14.212 +19 22 38.67 L F51
2017-08-15 11:52:44 C 00 31 14.521 +19 22 45.62 L F51
2017-08-24 12:45:27 C 00 34 41.44 +20 46 22.0 L T08
2017-08-24 12:53:50 C 00 34 41.47 +20 46 23.8 L T08
2017-08-24 13:07:52 C 00 34 41.62 +20 46 29.5 L T08
2017-08-24 13:19:55 C 00 34 41.85 +20 46 33.2 L T08
2017-09-01 12:03:29 C 00 36 02.81 +21 50 21.3 L T08
2017-09-01 12:05:37 C 00 36 02.79 +21 50 21.3 L T08
2017-09-01 12:29:26 C 00 36 02.80 +21 50 28.5 L T08
2017-09-01 12:30:58 C 00 36 02.81 +21 50 29.3 L T08
2017-09-01 12:33:22 C 00 36 02.77 +21 50 29.7 L T08
2017-09-01 12:41:13 C 00 36 02.76 +21 50 32.9 L T08
2017-09-01 12:46:11 C 00 36 02.75 +21 50 33.6 L T08
2017-09-11 12:12:42 C 00 35 11.23 +22 51 42.8 L T05
2017-09-11 12:23:08 C 00 35 11.07 +22 51 44.6 L T05
2017-09-11 12:31:21 C 00 35 10.98 +22 51 46.2 L T05
2017-09-11 12:48:31 C 00 35 10.74 +22 51 49.5 L T05