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
2006-10-29 03:44:28 C 00 32 39.26 +21 15 25.7 o 696
2007-12-17 12:04:31 C 10 41 20.94 -00 46 28.1 r G96
2007-12-17 12:14:28 C 10 41 21.62 -00 46 36.6 r G96
2007-12-17 12:24:21 C 10 41 22.23 -00 46 45.9 r G96
2007-12-17 12:34:18 C 10 41 22.92 -00 46 54.6 r G96
2007-12-19 11:23:48 C 10 44 30.98 -01 29 36.7 r G96
2007-12-19 11:32:22 C 10 44 31.52 -01 29 44.4 r G96
2007-12-19 11:40:55 C 10 44 32.06 -01 29 52.5 r G96
2007-12-19 11:49:26 C 10 44 32.64 -01 30 00.2 r G96
2008-02-08 15:40:20 C 12 03 55.22 -27 44 03.0 r E12
2008-02-08 15:57:35 C 12 03 56.41 -27 44 33.7 r E12
2008-02-08 16:15:23 C 12 03 57.52 -27 45 04.0 r E12
2008-02-15 06:22:39 C 12 15 09.24 -32 32 51.0 r 808
2008-02-15 06:32:30 C 12 15 09.97 -32 33 08.9 r 808
2008-02-15 06:42:29 C 12 15 10.61 -32 33 29.2 r 808
2008-02-16 15:37:43 C 12 17 38.72 -33 36 13.9 r E12
2008-02-16 16:02:25 C 12 17 40.45 -33 37 01.9 r E12
2008-02-16 16:26:49 C 12 17 42.14 -33 37 49.0 r E12
2008-02-16 16:50:14 C 12 17 43.80 -33 38 34.0 r E12
2008-03-02 15:50:16 C 12 50 11.72 -45 59 20.7 r E12
2008-03-02 16:00:01 C 12 50 12.69 -45 59 42.9 r E12
2008-03-02 16:09:40 C 12 50 13.70 -46 00 03.7 r E12
2008-03-02 16:19:27 C 12 50 14.71 -46 00 25.0 r E12
2008-05-05 17:05:39 C 20 54 01.00 -50 57 54.0 r E12
2008-06-08 02:33:27 C 21 21 37.01 -20 25 51.1 c J40
2008-06-08 02:38:04 C 21 21 36.85 -20 25 42.7 c J40
2008-06-08 02:40:36 C 21 21 36.79 -20 25 37.7 c J40
2008-06-09 10:25:50 C 21 20 42.20 -19 24 17.7 r 448
2008-06-09 10:28:53 C 21 20 42.07 -19 24 12.0 r 448
2008-06-09 10:31:56 C 21 20 41.96 -19 24 06.1 r 448
2008-06-09 10:34:59 C 21 20 41.84 -19 24 00.3 r 448
2008-06-09 10:38:02 C 21 20 41.72 -19 23 54.6 r 448
2008-06-13 11:07:22 C 21 17 16.15 -16 25 26.1 r 448
2008-06-13 11:09:24 C 21 17 16.06 -16 25 22.5 r 448
2008-06-13 11:11:26 C 21 17 15.88 -16 25 18.2 r 448
2008-06-28 01:32:26 C 20 57 47.27 -07 31 11.3 r B19
2008-06-28 01:35:15 C 20 57 47.02 -07 31 07.7 r B19
2008-06-28 01:38:03 C 20 57 46.82 -07 31 05.3 r B19
2008-06-29 04:14:07 C 20 55 57.96 -06 57 59.5 c 844
2008-06-29 04:18:36 C 20 55 57.61 -06 57 54.0 c 844
2008-06-29 04:20:55 C 20 55 57.46 -06 57 51.4 c 844
2008-06-29 05:16:31 C 20 55 53.19 -06 56 44.9 c 844
2008-06-29 05:21:48 C 20 55 52.84 -06 56 39.2 c 844
2008-06-30 07:42:40 C 20 54 02.94 -06 26 22.5 o 691
2008-06-30 08:12:57 C 20 54 00.60 -06 25 47.8 o 691
2008-06-30 08:38:37 C 20 53 58.61 -06 25 18.6 o 691
2008-07-02 06:35:36 C 20 50 42.45 -05 34 30.4 r H45
2008-07-02 06:36:37 C 20 50 42.37 -05 34 29.2 r H45
2008-07-02 06:38:52 C 20 50 42.19 -05 34 27.0 r H45
2008-07-02 06:41:20 C 20 50 41.99 -05 34 24.3 r H45