162117 (1998 SD15)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3447811863 ± 2.00e+00
Semi-major axis (a)0.9326108023 AU ± 3.00e+00
Inclination (i)26.79851824° ± 4.00e+00
Long. of Asc. Node (Ω)183.91077864° ± 5.00e+00
Arg. of Perihelion (ω)35.87830903° ± 6.00e+00
Mean Anomaly (M)164.75818051° ± 8.84e-06
Mean Motion (n)1.0943635356°/day ± 5.28e+00
Perihelion dist (q)0.61106414 AU ± 2.71e+00
Aphelion dist (Q)1.25415746 AU ± 4.44e+00
Orbital Period0.90063882 yr ± 4.35e+00
NGA Modelr2
A2-1.79358396e-06 AU/d²
Physical Parameters
H (abs. magnitude)19.04
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-26
RMS Residual0.292″
Uncertainty0
Orbit TypeAten
MOID0.109327 AU
Observations Used725
Oppositions3
Arc Total1998-2025
First Observation Used1998-09-23
Last Observation Used2025-12-07
Observations (805)
Date Type RA Dec Mag Band Observatory
1998-09-23 03:17:08 C 22 42 23.41 +18 56 04.2 18.4 a 704
1998-09-23 03:50:47 C 22 42 22.75 +18 50 00.2 a 704
1998-09-23 04:24:42 C 22 42 21.97 +18 43 50.9 a 704
1998-09-23 04:59:24 C 22 42 21.19 +18 37 35.5 a 704
1998-09-23 05:33:08 C 22 42 20.36 +18 31 28.8 a 704
1998-09-23 19:59:51 C 22 42 19.25 +15 56 33.2 046
1998-09-23 20:00:30 C 22 42 19.26 +15 56 26.5 046
1998-09-23 20:01:39 C 22 42 19.20 +15 56 15.2 046
1998-09-23 20:02:21 C 22 42 19.23 +15 56 06.5 046
1998-09-23 20:44:39 C 22 42 18.82 +15 48 46.0 z 587
1998-09-23 20:47:10 C 22 42 18.78 +15 48 19.6 z 587
1998-09-23 20:54:04 C 22 42 18.68 +15 47 07.1 z 587
1998-09-23 20:58:19 C 22 42 18.61 +15 46 22.0 z 587
1998-09-23 21:04:56 C 22 42 18.50 +15 45 12.9 z 587
1998-09-23 21:49:00 C 22 42 17.77 +15 37 25.8 b 611
1998-09-23 21:51:09 C 22 42 17.73 +15 37 03.1 b 611
1998-09-23 21:53:00 C 22 42 17.70 +15 36 43.9 b 611
1998-09-23 21:54:30 C 22 42 17.67 +15 36 28.3 b 611
1998-09-23 23:06:29 C 22 42 16.14 +15 23 51.1 557
1998-09-23 23:10:33 C 22 42 16.08 +15 23 08.6 557
1998-09-23 23:11:54 C 22 42 16.05 +15 22 54.5 557
1998-09-24 00:10:16 C 22 42 16.19 +15 12 43.2 z 966
1998-09-24 00:13:39 C 22 42 16.10 +15 12 06.1 z 966
1998-09-24 01:48:31 C 22 42 18.56 +14 55 45.7 z 835
1998-09-24 01:52:14 C 22 42 18.69 +14 55 07.2 b 816
1998-09-24 01:54:00 C 22 42 18.48 +14 54 51.6 z 835
1998-09-24 01:54:09 C 22 42 18.68 +14 54 47.9 b 816
1998-09-24 01:55:56 C 22 42 18.63 +14 54 29.2 b 816
1998-09-24 01:57:44 C 22 42 18.61 +14 54 10.4 b 816
1998-09-24 02:00:53 C 22 42 18.48 +14 53 39.4 z 835
1998-09-24 03:48:09 C 22 42 18.97 +14 35 18.2 18.2 a 704
1998-09-24 04:20:23 C 22 42 18.40 +14 29 45.0 18.5 a 704
1998-09-24 04:38:45 C 22 42 18.89 +14 26 31.9 z 670
1998-09-24 04:52:49 C 22 42 17.67 +14 24 10.3 18.3 a 704
1998-09-24 04:54:00 C 22 42 18.62 +14 23 54.8 z 670
1998-09-24 05:12:00 C 22 42 18.32 +14 20 50.5 z 670
1998-09-24 05:25:03 C 22 42 17.17 +14 18 36.6 a 704
1998-09-24 05:35:59 C 22 42 17.87 +14 16 42.8 z 670
1998-09-24 05:54:15 C 22 42 17.48 +14 13 34.7 z 670
1998-09-24 05:57:20 C 22 42 16.45 +14 13 04.4 a 704
1998-09-24 06:01:28 C 22 42 16.97 +14 12 17.3 z 682
1998-09-24 06:03:58 C 22 42 16.41 +14 11 56.3 16.8 a 704
1998-09-24 06:05:06 C 22 42 16.90 +14 11 39.2 z 682
1998-09-24 06:36:19 C 22 42 15.78 +14 06 22.2 a 704
1998-09-24 06:43:24 C 22 42 16.18 +14 05 03.6 z 682
1998-09-24 06:51:51 C 22 42 16.00 +14 03 37.4 z 682
1998-09-24 07:08:30 C 22 42 15.14 +14 00 50.6 a 704
1998-09-24 07:40:28 C 22 42 14.63 +13 55 22.4 a 704
1998-09-24 08:12:17 C 22 42 15.52 +13 49 38.3 658
1998-09-24 08:12:19 C 22 42 14.06 +13 49 53.3 a 704