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
2001-08-10 11:30:29 C 23 18 10.61 +16 29 41.8 20.0 c 644
2001-08-10 11:45:55 C 23 18 09.77 +16 29 42.6 19.9 c 644
2001-08-10 12:01:25 C 23 18 08.88 +16 29 43.4 19.8 c 644
2001-08-11 01:01:45 C 23 17 27.97 +16 30 34.9 d 557
2001-08-11 01:17:50 C 23 17 27.03 +16 30 35.3 d 557
2001-08-11 01:48:30 C 23 17 25.41 +16 30 37.4 d 557
2001-08-11 02:05:40 C 23 17 24.48 +16 30 37.9 d 557
2001-08-11 23:16:36 C 23 16 16.11 +16 31 46.0 c 046
2001-08-11 23:35:51 C 23 16 15.13 +16 31 48.4 c 046
2001-08-11 23:38:15 C 23 16 15.06 +16 31 46.3 c 046
2001-08-11 23:40:44 C 23 16 14.88 +16 31 48.0 c 046
2001-08-11 23:45:37 C 23 16 14.57 +16 31 46.9 c 046
2001-08-12 21:47:55 C 23 15 01.85 +16 32 31.6 c 046
2001-08-12 21:50:36 C 23 15 01.62 +16 32 31.5 c 046
2001-08-12 21:52:58 C 23 15 01.55 +16 32 31.8 c 046
2001-08-12 21:57:47 C 23 15 01.27 +16 32 31.2 c 046
2001-08-12 23:40:05 C 23 14 55.31 +16 32 35.3 c 557
2001-08-12 23:52:20 C 23 14 54.57 +16 32 34.9 c 557
2001-08-19 08:39:33 C 23 05 51.19 +16 25 52.0 c 649
2001-08-19 08:52:54 C 23 05 50.33 +16 25 50.6 c 649
2001-08-19 09:01:21 C 23 05 49.80 +16 25 49.5 c 649
2001-08-23 16:30:24 C 22 59 17.08 +16 09 48.2 360
2001-08-23 16:33:53 C 22 59 16.80 +16 09 47.7 360
2001-08-23 16:39:19 C 22 59 16.46 +16 09 46.6 360
2001-08-23 16:45:23 C 22 59 16.08 +16 09 45.6 360
2001-08-24 14:33:05 C 22 57 52.18 +16 05 25.9 m 413
2001-08-24 14:34:19 C 22 57 52.08 +16 05 25.3 m 413
2001-08-24 14:35:36 C 22 57 52.02 +16 05 25.2 m 413
2001-08-24 20:36:52 C 22 57 28.99 +16 03 53.5 d 540
2001-08-24 20:57:09 C 22 57 27.61 +16 03 48.5 d 540
2001-09-08 03:19:47 C 22 36 08.13 +14 08 45.5 c 715
2001-09-08 03:25:24 C 22 36 07.35 +14 08 38.7 c 715
2001-09-08 03:32:51 C 22 36 06.96 +14 08 34.8 c 715
2001-09-25 03:25:42 C 22 17 32.68 +10 54 10.6 715
2001-09-25 03:31:20 C 22 17 32.45 +10 54 08.2 715
2001-09-25 03:38:49 C 22 17 32.20 +10 54 04.9 715
2001-10-06 03:16:44 C 22 11 39.53 +08 52 15.1 o 644
2001-10-06 03:31:51 C 22 11 39.33 +08 52 09.2 o 644
2001-10-06 03:47:13 C 22 11 39.10 +08 52 02.1 o 644
2002-12-08 21:52:18 C 06 59 21.75 +23 22 31.7 d 540
2002-12-08 22:06:47 C 06 59 21.00 +23 22 28.8 d 540
2002-12-09 21:20:32 C 06 58 14.38 +23 18 59.3 d 540
2002-12-09 21:42:15 C 06 58 13.30 +23 18 57.2 d 540
2003-01-30 05:31:29 C 05 40 35.37 +18 45 51.2 c 448
2003-01-30 05:45:23 C 05 40 34.75 +18 45 48.3 c 448
2003-01-30 05:55:51 C 05 40 34.36 +18 45 45.5 c 448
2006-08-20 08:56:17 C 01 42 52.78 +26 11 05.4 d 291
2006-08-20 09:04:53 C 01 42 52.81 +26 11 07.9 d 291
2006-08-20 09:15:00 C 01 42 52.75 +26 11 10.5 d 291
2006-10-29 03:14:31 C 00 32 40.49 +21 15 40.1 o 696