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
2008-07-22 23:38:49 C 20 16 03.12 -00 10 52.6 r B19
2008-07-22 23:47:32 C 20 16 02.54 -00 10 50.0 r B19
2008-07-23 22:24:52 C 20 14 43.09 -00 04 53.5 r A13
2008-07-23 22:54:16 C 20 14 41.25 -00 04 46.3 r A13
2008-07-23 22:57:12 C 20 14 41.07 -00 04 45.6 r A13
2008-07-23 23:00:34 C 20 14 40.86 -00 04 44.6 r A13
2008-07-25 07:42:38 C 20 12 48.74 +00 02 49.8 r H45
2008-07-25 07:45:51 C 20 12 48.58 +00 02 50.3 r H45
2008-07-25 08:03:27 C 20 12 47.50 +00 02 53.6 r H45
2008-07-25 08:06:08 C 20 12 47.35 +00 02 54.5 r H45
2008-07-25 08:08:36 C 20 12 47.19 +00 02 55.0 r H45
2008-07-25 08:39:14 C 20 12 45.89 +00 03 01.8 o 669
2008-07-25 22:48:25 C 20 11 58.92 +00 05 49.2 17.8 r C20
2008-07-25 22:52:04 C 20 11 58.67 +00 05 49.6 17.5 r C20
2008-07-26 08:34:46 C 20 11 27.41 +00 07 41.5 o 669
2008-07-28 21:12:53 C 20 08 20.58 +00 16 38.6 r A78
2008-07-28 21:16:50 C 20 08 20.39 +00 16 39.5 r A78
2008-07-28 21:22:13 C 20 08 20.14 +00 16 40.0 r A78
2008-07-28 21:26:35 C 20 08 19.87 +00 16 40.4 r A78
2008-07-29 05:07:30 C 20 07 57.57 +00 17 35.6 o 691
2008-07-29 05:26:20 C 20 07 56.54 +00 17 37.5 o 691
2008-07-29 05:45:10 C 20 07 55.57 +00 17 41.7 o 691
2008-07-29 10:50:45 C 20 07 39.48 +00 18 11.0 o 669
2008-07-30 00:57:21 C 20 06 59.80 +00 19 30.5 c B37
2008-07-30 01:03:25 C 20 06 59.42 +00 19 30.6 c B37
2008-07-30 01:12:39 C 20 06 58.97 +00 19 31.9 c B37
2008-07-30 01:20:02 C 20 06 58.51 +00 19 32.6 c B37
2008-07-31 03:52:55 C 20 05 46.95 +00 21 35.1 o 691
2008-07-31 04:16:53 C 20 05 45.45 +00 21 35.8 r H45
2008-07-31 04:18:40 C 20 05 45.35 +00 21 35.8 r H45
2008-07-31 04:26:17 C 20 05 45.00 +00 21 36.4 r H45
2008-07-31 04:29:38 C 20 05 44.83 +00 21 36.7 r H45
2008-07-31 04:31:59 C 20 05 44.68 +00 21 36.7 r H45
2011-11-03 07:22:08 C 02 39 02.88 +29 14 33.6 r G96
2011-11-03 07:35:22 C 02 39 02.05 +29 14 28.9 r G96
2011-11-03 07:48:46 C 02 39 01.33 +29 14 24.6 r G96
2011-11-03 08:02:09 C 02 39 00.43 +29 14 19.7 r G96
2013-08-28 13:23:11 C 00 33 30.430 +23 16 46.04 L F51
2013-08-28 13:40:36 C 00 33 29.643 +23 16 45.89 L F51
2014-12-27 09:06:04 C 08 38 50.61 +11 35 33.6 R G45
2014-12-27 09:12:08 C 08 38 50.40 +11 35 31.4 R G45
2014-12-27 09:31:50 C 08 38 49.79 +11 35 23.8 R G45
2014-12-27 09:38:00 C 08 38 49.58 +11 35 21.9 R G45
2014-12-29 08:56:18 C 08 37 19.89 +11 17 45.2 R G45
2014-12-29 09:00:41 C 08 37 19.80 +11 17 43.1 R G45
2014-12-29 09:10:00 C 08 37 19.38 +11 17 40.0 R G45
2014-12-29 09:14:23 C 08 37 19.21 +11 17 38.0 R G45
2015-01-02 07:10:00 C 08 33 46.48 +10 42 51.0 q 703
2015-01-02 07:14:52 C 08 33 46.31 +10 42 49.7 q 703
2015-01-02 07:19:45 C 08 33 46.08 +10 42 46.9 q 703