1998 SS4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5102467000
Semi-major axis (a)2.2731804000 AU
Inclination (i)9.59247000° ± 4.00e+00
Long. of Asc. Node (Ω)180.70304000° ± 5.00e+00
Arg. of Perihelion (ω)174.69494000°
Mean Anomaly (M)334.11400000°
Mean Motion (n)0.2875763900°/day
Perihelion dist (q)1.11329760 AU
Aphelion dist (Q)3.43306320 AU
Orbital Period3.42729000 yr
Physical Parameters
H (abs. magnitude)21.80
G (slope)0.15
Orbit Solution
SourceMPC
Solution Date
RMS Residual0.720″
Uncertainty6
Orbit TypeAmor
MOID0.107884 AU
Observations Used36
Oppositions1
Arc Total
First Observation Used
Last Observation Used1998-10-13
Observations (40)
Date Type RA Dec Mag Band Observatory
1998-09-19 03:39:26 C 22 00 38.67 +00 10 52.5 19.2 a 704
1998-09-19 04:09:32 C 22 00 47.14 +00 09 39.3 19.1 a 704
1998-09-19 04:39:29 C 22 00 55.66 +00 08 26.4 18.5 a 704
1998-09-19 05:09:26 C 22 01 04.20 +00 07 13.7 19.8 a 704
1998-09-19 23:42:16 C 22 06 39.14 -00 38 11.2 046
1998-09-19 23:43:55 C 22 06 39.66 -00 38 15.7 046
1998-09-19 23:45:35 C 22 06 40.17 -00 38 19.9 046
1998-09-20 11:41:21 C 22 10 23.29 -01 06 02.4 b 426
1998-09-20 11:52:29 C 22 10 26.51 -01 06 29.8 b 426
1998-09-20 11:57:23 C 22 10 27.96 -01 06 42.7 b 426
1998-09-20 19:40:22 C 22 12 51.36 -01 27 16.0 557
1998-09-20 19:43:43 C 22 12 52.39 -01 27 24.4 557
1998-09-20 20:53:34 C 22 13 13.29 -01 30 13.9 z 587
1998-09-20 20:57:09 C 22 13 14.35 -01 30 22.0 z 587
1998-09-20 21:03:15 C 22 13 16.25 -01 30 38.1 z 587
1998-09-21 06:09:31 C 22 16 05.14 -01 52 52.6 18.9 a 704
1998-09-21 06:41:40 C 22 16 14.46 -01 54 11.3 19.4 a 704
1998-09-21 07:13:41 C 22 16 24.06 -01 55 32.8 19.1 a 704
1998-09-21 07:45:34 C 22 16 33.56 -01 56 48.8 18.9 a 704
1998-09-21 08:30:18 C 22 16 46.69 -01 58 42.0 20.0 a 704
1998-09-23 21:06:57 C 22 36 07.92 -04 28 30.3 118
1998-09-23 21:14:06 C 22 36 10.13 -04 28 47.9 118
1998-09-25 03:02:26 C 22 45 51.66 -05 40 55.8 18.9 a 704
1998-09-25 03:36:07 C 22 46 02.19 -05 42 18.7 19.0 a 704
1998-09-25 04:09:33 C 22 46 12.44 -05 43 37.6 19.5 a 704
1998-09-25 04:42:53 C 22 46 22.74 -05 44 58.8 19.1 a 704
1998-09-25 05:16:09 C 22 46 32.98 -05 46 19.3 19.1 a 704
1998-09-25 22:58:30 C 22 52 16.82 -06 28 43.2 557
1998-09-25 22:59:56 C 22 52 17.28 -06 28 46.3 557
1998-09-25 23:02:48 C 22 52 18.21 -06 28 53.8 557
1998-09-27 04:50:57 C 23 02 01.42 -07 37 56.3 18.9 a 704
1998-09-27 05:16:08 C 23 02 09.29 -07 38 52.7 20.3 a 704
1998-09-27 05:41:06 C 23 02 16.93 -07 39 51.8 18.6 a 704
1998-09-27 06:06:00 C 23 02 24.52 -07 40 47.6 19.0 a 704
1998-09-27 06:31:13 C 23 02 32.25 -07 41 45.6 19.3 a 704
1998-10-01 12:09:27 C 23 34 56.32 -11 14 55.5 z 402
1998-10-01 12:11:27 C 23 34 56.56 -11 14 56.1 z 402
1998-10-01 12:13:27 C 23 34 57.46 -11 15 02.8 z 402
1998-10-13 14:54:23 C 00 51 13.18 -17 11 12.4 422
1998-10-13 14:55:30 C 00 51 13.39 -17 11 14.5 422