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
2020-08-28 15:39:51 C 22 53 34.46 +15 55 18.8 q D29
2020-08-29 10:02:10 C 22 52 23.31 +15 49 56.1 U I41
2020-08-29 10:05:05 C 22 52 23.15 +15 49 55.4 U I41
2020-08-29 10:55:35 C 22 52 19.81 +15 49 39.8 U I41
2020-08-29 10:56:55 C 22 52 19.72 +15 49 39.4 U I41
2020-09-06 11:38:24 C 22 40 22.264 +14 40 23.96 U F51
2020-09-06 11:43:03 C 22 40 21.979 +14 40 22.08 U F51
2020-09-06 11:55:26 C 22 40 21.211 +14 40 16.88 U F51
2020-09-06 12:00:06 C 22 40 20.931 +14 40 14.98 U F51
2020-09-06 12:12:32 C 22 40 20.168 +14 40 09.72 U F51
2020-09-06 12:17:11 C 22 40 19.873 +14 40 07.79 U F51
2020-09-06 12:29:38 C 22 40 19.106 +14 40 02.66 U F51
2020-09-06 12:34:17 C 22 40 18.820 +14 40 00.64 U F51
2020-09-06 13:29:49 C 22 40 16.22 +14 39 35.2 q D29
2020-09-06 13:47:31 C 22 40 15.16 +14 39 28.9 q D29
2020-09-06 14:05:13 C 22 40 14.09 +14 39 21.6 q D29
2020-09-10 05:41:35 C 22 35 13.05 +14 01 27.6 V G96
2020-09-10 05:47:40 C 22 35 12.67 +14 01 24.9 V G96
2020-09-10 05:53:44 C 22 35 12.34 +14 01 22.3 V G96
2020-09-10 05:59:47 C 22 35 12.01 +14 01 19.6 V G96
2020-09-11 08:04:14 C 22 33 46.794 +13 49 30.69 U F52
2020-09-11 08:19:08 C 22 33 45.935 +13 49 24.08 U F52
2020-09-11 08:34:09 C 22 33 45.100 +13 49 17.12 U F52
2020-09-14 05:24:29 C 22 30 10.36 +13 17 00.1 U I41
2020-09-14 07:09:41 C 22 30 04.88 +13 16 10.2 U I41
2020-09-14 07:54:28 C 22 30 02.51 +13 15 48.7 U I41
2020-09-14 08:11:56 C 22 30 01.61 +13 15 40.1 U I41
2020-09-14 08:28:54 C 22 30 00.71 +13 15 31.8 U I41
2020-09-15 06:36:35 C 22 28 55.65 +13 04 54.8 U I41
2020-09-15 06:37:55 C 22 28 55.58 +13 04 54.2 U I41
2020-09-15 07:38:55 C 22 28 52.48 +13 04 25.0 U I41
2020-09-15 07:43:39 C 22 28 52.23 +13 04 22.7 U I41
2020-09-16 07:23:55 C 22 27 44.908 +12 52 56.20 U F51
2020-09-16 07:40:24 C 22 27 44.093 +12 52 48.23 U F51
2020-09-16 07:57:04 C 22 27 43.270 +12 52 40.18 U F51
2020-09-16 08:13:41 C 22 27 42.449 +12 52 32.11 U F51
2020-09-18 06:08:09 C 22 25 37.15 +12 30 01.4 U I41
2020-09-18 06:09:30 C 22 25 37.05 +12 30 00.6 U I41
2020-09-18 06:55:39 C 22 25 34.93 +12 29 37.9 U I41
2020-09-18 07:27:06 C 22 25 33.51 +12 29 22.4 U I41
2020-09-18 07:29:09 C 22 25 33.42 +12 29 21.4 U I41
2020-09-20 05:59:04 C 22 23 35.54 +12 06 23.8 V G96
2020-09-20 06:07:12 C 22 23 35.19 +12 06 19.8 V G96
2020-09-20 06:15:21 C 22 23 34.84 +12 06 15.8 V G96
2020-09-20 06:23:30 C 22 23 34.48 +12 06 11.6 V G96
2020-09-22 09:48:10 C 22 21 34.463 +11 40 46.10 U F52
2020-09-22 10:05:00 C 22 21 33.799 +11 40 37.90 U F52
2020-09-22 10:21:45 C 22 21 33.141 +11 40 29.50 U F52
2020-10-07 02:03:34 C 22 12 58.57 +08 55 33.8 V G96
2020-10-07 02:11:36 C 22 12 58.44 +08 55 30.6 V G96