173689 (2001 PK9)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3950733059 ± 1.97e-08
Semi-major axis (a)1.7793773898 AU ± 3.72e-09
Inclination (i)10.43100174° ± 3.44e-06
Long. of Asc. Node (Ω)272.87809749° ± 1.36e-05
Arg. of Perihelion (ω)314.05862433° ± 1.55e-05
Mean Anomaly (M)143.16427750° ± 1.19e-05
Mean Motion (n)0.4152505100°/day ± 1.30e-09
Perihelion dist (q)1.07639288 AU ± 3.52e-08
Aphelion dist (Q)2.48236190 AU ± 3.55e-08
Orbital Period2.37357031 yr ± 7.44e-09
Physical Parameters
H (abs. magnitude)18.25
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.308″
Uncertainty0
Orbit TypeAmor
MOID0.113528 AU
Observations Used378
Oppositions14
Arc Total2001-2025
First Observation Used2001-08-10
Last Observation Used2025-11-26
Observations (400)
Date Type RA Dec Mag Band Observatory
2008-07-02 06:43:03 C 20 50 41.85 -05 34 22.4 r H45
2008-07-03 07:46:48 C 20 48 53.05 -05 08 12.1 17.4 c 704
2008-07-03 08:01:00 C 20 48 51.91 -05 07 57.6 17.5 c 704
2008-07-03 08:15:12 C 20 48 50.79 -05 07 42.9 17.6 c 704
2008-07-03 08:29:28 C 20 48 49.64 -05 07 28.7 17.6 c 704
2008-07-03 08:44:01 C 20 48 48.52 -05 07 12.6 18.8 c 704
2008-07-03 23:41:19 C 20 47 43.59 -04 52 13.9 c A77
2008-07-04 00:21:57 C 20 47 40.44 -04 51 34.5 c A77
2008-07-04 01:29:53 C 20 47 35.71 -04 50 20.6 r J51
2008-07-04 01:38:43 C 20 47 35.01 -04 50 12.1 r J51
2008-07-04 01:47:34 C 20 47 34.30 -04 50 03.6 r J51
2008-07-04 23:37:55 C 20 45 57.62 -04 28 57.5 17.8 r C20
2008-07-04 23:41:34 C 20 45 57.32 -04 28 54.2 17.1 r C20
2008-07-05 22:08:03 C 20 44 18.99 -04 07 58.6 16.3 r C20
2008-07-05 22:11:42 C 20 44 18.66 -04 07 55.8 16.7 r C20
2008-07-09 01:22:25 C 20 38 47.02 -03 04 08.3 r J51
2008-07-09 01:28:27 C 20 38 46.52 -03 04 03.3 r J51
2008-07-09 01:34:28 C 20 38 46.03 -03 03 58.5 r J51
2008-07-09 23:16:01 C 20 37 10.94 -02 47 29.1 r B19
2008-07-09 23:19:45 C 20 37 10.66 -02 47 27.2 r B19
2008-07-09 23:24:10 C 20 37 10.38 -02 47 22.9 r B19
2008-07-14 09:27:38 C 20 29 31.27 -01 37 32.7 r H45
2008-07-14 09:29:20 C 20 29 31.17 -01 37 31.5 r H45
2008-07-14 09:30:56 C 20 29 31.05 -01 37 30.9 r H45
2008-07-14 09:32:40 C 20 29 30.90 -01 37 29.9 r H45
2008-07-14 09:35:53 C 20 29 30.67 -01 37 28.0 r H45
2008-07-15 08:54:18 C 20 27 53.18 -01 24 32.3 r H45
2008-07-15 08:56:00 C 20 27 53.07 -01 24 31.6 r H45
2008-07-15 08:58:34 C 20 27 52.87 -01 24 30.2 r H45
2008-07-15 09:01:15 C 20 27 52.67 -01 24 28.9 r H45
2008-07-15 09:04:08 C 20 27 52.43 -01 24 27.4 r H45
2008-07-16 00:13:52 C 20 26 50.58 -01 16 33.6 r J59
2008-07-16 00:27:45 C 20 26 49.63 -01 16 26.6 r J59
2008-07-16 23:12:33 C 20 25 15.78 -01 05 10.3 18.0 r C20
2008-07-20 04:24:10 C 20 20 12.29 -00 32 33.8 r H53
2008-07-20 04:31:28 C 20 20 11.80 -00 32 27.7 r H53
2008-07-20 04:39:24 C 20 20 11.33 -00 32 28.3 r H53
2008-07-20 04:41:58 C 20 20 10.98 -00 32 28.6 r H53
2008-07-22 03:42:52 C 20 17 15.54 -00 16 40.8 r H53
2008-07-22 03:44:48 C 20 17 15.63 -00 16 39.2 r H53
2008-07-22 03:46:28 C 20 17 15.39 -00 16 39.3 r H53
2008-07-22 03:50:24 C 20 17 15.24 -00 16 37.5 r H53
2008-07-22 03:53:55 C 20 17 14.91 -00 16 37.2 r H53
2008-07-22 03:56:59 C 20 17 14.81 -00 16 36.6 r H53
2008-07-22 08:11:18 C 20 16 58.14 -00 15 19.1 r H45
2008-07-22 08:13:19 C 20 16 57.93 -00 15 17.7 r H45
2008-07-22 08:17:16 C 20 16 57.64 -00 15 17.1 r H45
2008-07-22 08:18:45 C 20 16 57.61 -00 15 16.3 r H45
2008-07-22 08:22:07 C 20 16 57.37 -00 15 15.9 r H45
2008-07-22 23:29:49 C 20 16 03.69 -00 10 55.2 r B19