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
1998-09-24 08:15:49 C 22 42 15.50 +13 49 02.2 658
1998-09-24 08:20:05 C 22 42 15.44 +13 48 18.4 658
1998-09-24 12:25:14 C 22 42 17.72 +13 08 10.2 b 426
1998-09-24 12:28:14 C 22 42 17.66 +13 07 40.1 b 426
1998-09-24 12:30:38 C 22 42 17.62 +13 07 15.8 b 426
1998-09-24 12:33:02 C 22 42 17.58 +13 06 50.8 b 426
1998-09-24 18:31:48 C 22 42 18.99 +12 05 02.5 z 540
1998-09-24 18:33:22 C 22 42 18.97 +12 04 46.7 z 540
1998-09-24 18:34:53 C 22 42 18.97 +12 04 31.7 z 540
1998-09-24 18:36:23 C 22 42 18.91 +12 04 16.7 z 540
1998-09-24 20:23:55 C 22 42 17.58 +11 46 25.1 557
1998-09-24 20:25:37 C 22 42 17.56 +11 46 08.2 557
1998-09-24 20:27:18 C 22 42 17.54 +11 45 51.3 557
1998-09-24 20:28:09 C 22 42 17.53 +11 45 42.9 557
1998-09-24 21:28:25 C 22 42 16.60 +11 35 46.3 118
1998-09-24 21:34:23 C 22 42 16.51 +11 34 47.2 118
1998-09-24 21:37:19 C 22 42 16.47 +11 34 18.2 118
1998-09-24 21:47:58 C 22 42 16.49 +11 32 32.0 046
1998-09-24 21:48:51 C 22 42 16.47 +11 32 23.2 046
1998-09-24 21:49:55 C 22 42 16.47 +11 32 12.4 046
1998-09-24 21:50:42 C 22 42 16.46 +11 32 04.7 046
1998-09-24 22:31:35 C 22 42 16.51 +11 25 28.8 z 620
1998-09-24 22:33:27 C 22 42 16.48 +11 25 11.1 z 620
1998-09-24 22:35:16 C 22 42 16.46 +11 24 53.0 z 620
1998-09-24 22:42:24 C 22 42 16.35 +11 23 41.8 z 620
1998-09-24 22:45:54 C 22 42 16.28 +11 23 07.4 z 620
1998-09-25 04:20:00 C 22 42 18.12 +10 28 28.0 b 713
1998-09-25 04:41:24 C 22 42 17.80 +10 24 59.6 b 713
1998-09-25 05:00:01 C 22 42 17.52 +10 21 58.9 b 713
1998-09-25 05:36:54 C 22 42 16.96 +10 16 00.6 b 713
1998-09-25 05:50:33 C 22 42 16.77 +10 13 48.0 b 713
1998-09-25 11:19:50 C 22 42 18.79 +09 22 17.0 422
1998-09-25 11:21:33 C 22 42 18.73 +09 22 00.6 422
1998-09-25 11:22:11 C 22 42 18.73 +09 21 54.5 422
1998-09-25 11:25:10 C 22 42 18.67 +09 21 25.9 422
1998-09-25 23:32:07 C 22 42 17.89 +07 26 07.7 046
1998-09-25 23:33:19 C 22 42 17.88 +07 25 56.6 046
1998-09-25 23:34:14 C 22 42 17.87 +07 25 48.6 046
1998-09-25 23:35:08 C 22 42 17.86 +07 25 39.8 046
1998-09-27 00:41:55 C 22 42 26.62 +03 43 50.6 z 860
1998-09-27 00:51:33 C 22 42 26.46 +03 42 28.9 z 860
1998-09-27 01:02:26 C 22 42 26.29 +03 40 58.9 z 860
1998-09-27 21:46:03 C 22 42 33.15 +00 48 50.0 557
1998-09-27 21:48:05 C 22 42 33.14 +00 48 33.8 557
1998-09-27 21:49:07 C 22 42 33.14 +00 48 25.8 557
1998-09-28 04:14:03 C 22 42 36.36 -00 02 00.3 z 750
1998-09-28 04:22:14 C 22 42 36.27 -00 03 05.7 z 750
1998-09-28 04:33:55 C 22 42 36.28 -00 04 35.5 z 750
1998-09-28 06:14:44 C 22 42 37.17 -00 17 28.0 z 670
1998-09-28 06:27:00 C 22 42 37.07 -00 19 02.3 z 670