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
2016-09-28 20:34:02 C 21 26 33.51 -02 15 45.4 16.5 q K78
2016-09-28 20:43:39 C 21 26 34.88 -02 16 49.2 16.6 q K78
2016-09-28 20:53:10 C 21 26 36.18 -02 17 52.1 q 160
2016-09-28 20:55:10 C 21 26 36.46 -02 18 05.2 q 160
2016-09-28 20:57:11 C 21 26 36.76 -02 18 18.5 q 160
2016-09-29 19:23:14 C 21 30 00.57 -04 41 16.0 16.6 q K78
2016-09-29 19:38:14 C 21 30 02.59 -04 42 47.3 16.7 q K78
2016-09-29 20:11:11 C 21 30 07.08 -04 46 09.4 16.7 q K78
2016-09-30 04:34:32 C 21 31 20.03 -05 36 32.3 o 691
2016-09-30 04:40:21 C 21 31 20.79 -05 37 06.5 o 691
2016-09-30 04:46:09 C 21 31 21.55 -05 37 41.0 o 691
2016-09-30 06:21:07 C 21 31 36.360 -05 46 53.12 U T12
2016-09-30 06:21:45 C 21 31 36.443 -05 46 56.99 U T12
2016-09-30 06:22:22 C 21 31 36.522 -05 47 00.51 U T12
2016-09-30 19:41:52 C 21 33 28.45 -07 04 03.8 q 089
2016-09-30 19:45:13 C 21 33 28.85 -07 04 22.2 q 089
2016-09-30 19:48:34 C 21 33 29.27 -07 04 41.3 q 089
2016-09-30 19:51:55 C 21 33 29.75 -07 05 00.0 q 089
2016-09-30 20:35:39 C 21 33 35.43 -07 09 05.7 q 089
2016-09-30 20:39:01 C 21 33 35.86 -07 09 24.1 q 089
2016-09-30 20:42:22 C 21 33 36.30 -07 09 43.0 q 089
2016-09-30 20:45:43 C 21 33 36.74 -07 10 02.3 q 089
2016-09-30 20:49:04 C 21 33 37.20 -07 10 20.3 q 089
2016-09-30 20:52:25 C 21 33 37.65 -07 10 39.1 q 089
2016-10-01 03:27:23 C 21 34 34.24 -07 46 56.4 o 691
2016-10-01 03:29:57 C 21 34 34.57 -07 47 10.5 o 691
2016-10-01 03:35:09 C 21 34 35.25 -07 47 40.0 o 691
2016-10-01 03:38:27 C 21 34 35.66 -07 47 57.7 o 691
2016-10-01 03:41:47 C 21 34 36.07 -07 48 15.8 o 691
2016-10-01 06:39:20 C 21 34 58.24 -08 04 20.0 q I52
2016-10-01 06:43:35 C 21 34 58.78 -08 04 43.1 q I52
2016-10-01 06:47:45 C 21 34 59.29 -08 05 05.4 q I52
2016-10-01 06:51:52 C 21 34 59.83 -08 05 27.6 q I52
2016-10-02 04:10:37 C 21 37 53.13 -09 56 21.0 o 691
2016-10-02 04:20:14 C 21 37 54.26 -09 57 09.0 o 691
2016-10-02 04:29:50 C 21 37 55.42 -09 57 57.2 o 691
2016-10-02 05:01:40 C 21 37 58.41 -10 00 37.3 q H45
2016-10-02 05:03:21 C 21 37 58.62 -10 00 45.9 q H45
2016-10-02 05:04:23 C 21 37 58.74 -10 00 51.0 q H45
2016-10-02 05:05:16 C 21 37 58.85 -10 00 55.3 q H45
2016-10-02 05:06:14 C 21 37 58.97 -10 01 00.4 q H45
2016-10-02 05:07:05 C 21 37 59.07 -10 01 04.6 q H45
2016-10-06 08:10:19 C 21 49 57.88 -16 56 11.7 L T05
2016-10-06 08:31:53 C 21 50 00.06 -16 57 26.8 L T05
2016-10-06 08:53:28 C 21 50 02.24 -16 58 41.2 L T05
2016-10-06 09:15:03 C 21 50 04.42 -16 59 55.5 L T05
2016-10-09 05:18:37 C 21 57 21.55 -20 29 55.9 o 691
2016-10-09 06:10:40 C 21 57 26.42 -20 32 17.0 o 691
2016-10-10 03:15:48 C 21 59 36.01 -21 27 33.1 o 691
2016-10-10 03:37:39 C 21 59 38.00 -21 28 28.6 o 691