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
2015-01-02 07:24:38 C 08 33 45.89 +10 42 47.0 q 703
2015-01-15 07:25:41 C 08 16 37.33 +08 50 37.0 q 703
2015-01-15 07:32:57 C 08 16 36.83 +08 50 34.2 q 703
2015-01-15 07:47:30 C 08 16 35.87 +08 50 30.3 q 703
2015-01-16 09:22:52 C 08 14 51.33 +08 41 41.1 R G45
2015-01-16 09:34:55 C 08 14 50.47 +08 41 37.4 R G45
2015-01-16 09:36:57 C 08 14 50.29 +08 41 36.5 R G45
2015-01-16 09:49:25 C 08 14 49.42 +08 41 32.7 R G45
2015-01-16 09:56:51 C 08 14 48.90 +08 41 29.7 R G45
2015-01-16 10:02:46 C 08 14 48.49 +08 41 27.4 R G45
2015-01-17 09:15:03 C 08 13 11.99 +08 33 33.7 R G45
2015-01-17 09:26:56 C 08 13 11.10 +08 33 29.4 R G45
2015-01-17 09:35:02 C 08 13 10.52 +08 33 26.9 R G45
2015-01-17 09:41:00 C 08 13 10.07 +08 33 24.8 R G45
2015-01-17 09:47:10 C 08 13 09.65 +08 33 22.4 R G45
2015-01-17 09:54:32 C 08 13 09.09 +08 33 20.2 R G45
2015-01-19 09:21:55 C 08 09 45.50 +08 17 26.3 R G45
2015-01-19 09:27:53 C 08 09 45.16 +08 17 24.1 R G45
2015-01-19 09:33:59 C 08 09 44.69 +08 17 22.2 R G45
2015-01-19 09:41:25 C 08 09 44.11 +08 17 19.6 R G45
2015-01-19 09:53:18 C 08 09 43.21 +08 17 15.8 R G45
2015-01-19 10:12:28 C 08 09 42.338 +08 17 12.07 L F51
2015-01-19 10:29:23 C 08 09 41.047 +08 17 06.48 L F51
2015-01-19 10:46:20 C 08 09 39.757 +08 17 00.87 L F51
2015-01-19 11:03:21 C 08 09 38.457 +08 16 55.22 L F51
2015-01-20 09:18:51 C 08 08 00.11 +08 09 32.4 R G45
2015-01-20 09:30:54 C 08 07 59.18 +08 09 28.5 R G45
2015-01-20 09:32:21 C 08 07 59.10 +08 09 27.7 R G45
2015-01-20 09:38:22 C 08 07 58.62 +08 09 25.8 R G45
2015-01-20 09:44:20 C 08 07 58.16 +08 09 24.0 R G45
2015-02-09 06:25:48 C 07 31 16.86 +05 57 58.2 q 448
2015-02-09 06:33:06 C 07 31 16.30 +05 57 56.8 q 448
2015-02-09 06:53:38 C 07 31 14.80 +05 57 52.4 q 448
2015-02-10 13:52:10 C 07 29 03.98 +05 51 23.4 q D29
2015-02-10 14:17:34 C 07 29 02.10 +05 51 18.4 q D29
2015-03-05 01:24:11 C 07 04 25.62 +04 39 34.4 u 807
2015-03-05 01:29:41 C 07 04 25.50 +04 39 33.9 u 807
2015-03-05 01:35:21 C 07 04 25.37 +04 39 33.7 u 807
2015-03-11 03:47:57 C 07 02 59.78 +04 29 16.5 q 448
2015-03-11 04:09:03 C 07 02 59.72 +04 29 15.0 q 448
2015-03-11 04:30:10 C 07 02 59.63 +04 29 14.2 q 448
2015-04-02 13:13:29 S 07 16 20.03 +03 56 40.3 L C51
2015-04-02 22:40:39 S 07 16 48.25 +03 55 56.1 L C51
2015-04-03 03:24:19 S 07 17 02.47 +03 55 31.8 L C51
2015-04-03 09:42:36 S 07 17 21.76 +03 55 01.1 L C51
2015-04-03 19:09:46 S 07 17 50.87 +03 54 15.0 L C51
2015-04-04 01:27:52 S 07 18 10.54 +03 53 42.6 L C51
2015-05-05 23:23:32 C 08 19 41.58 +01 51 34.1 u 807
2015-05-05 23:30:00 C 08 19 42.20 +01 51 32.6 u 807
2015-05-05 23:36:36 C 08 19 42.90 +01 51 31.2 u 807