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
2020-10-07 02:19:39 C 22 12 58.31 +08 55 26.7 V G96
2020-10-07 02:27:41 C 22 12 58.19 +08 55 24.2 V G96
2020-10-10 07:38:15 C 22 12 14.849 +08 23 23.98 U F52
2020-10-10 07:55:49 C 22 12 14.684 +08 23 17.20 U F52
2020-10-10 08:13:20 C 22 12 14.538 +08 23 10.02 U F52
2020-10-10 08:30:50 C 22 12 14.389 +08 23 02.95 U F52
2020-10-14 08:43:35 C 22 11 54.034 +07 45 59.22 U F51
2020-10-14 09:01:27 C 22 11 54.002 +07 45 52.63 U F51
2020-10-14 09:19:17 C 22 11 53.963 +07 45 46.06 U F51
2020-10-14 09:37:09 C 22 11 53.923 +07 45 39.45 U F51
2020-10-15 05:15:13 C 22 11 54.712 +07 38 30.57 U F52
2020-10-15 05:31:46 C 22 11 54.692 +07 38 24.69 U F52
2020-10-15 05:48:21 C 22 11 54.686 +07 38 18.84 U F52
2020-10-15 06:04:58 C 22 11 54.650 +07 38 13.06 U F52
2020-10-16 02:56:43 C 22 11 56.61 +07 30 45.7 V G96
2020-10-16 03:04:52 C 22 11 56.63 +07 30 42.8 V G96
2020-10-16 03:13:01 C 22 11 56.60 +07 30 39.8 V G96
2020-10-16 03:21:11 C 22 11 56.65 +07 30 36.9 V G96
2021-11-30 10:16:00 C 07 09 25.66 +23 37 59.1 V V00
2021-11-30 10:22:59 C 07 09 25.44 +23 37 58.2 V V00
2021-11-30 10:30:00 C 07 09 25.22 +23 37 57.3 V V00
2021-12-27 06:32:43 C 06 34 54.34 +21 50 03.8 V G96
2021-12-27 06:40:45 C 06 34 53.74 +21 50 01.8 V G96
2021-12-27 06:48:48 C 06 34 53.16 +21 50 00.5 V G96
2021-12-27 06:56:50 C 06 34 52.56 +21 49 58.7 V G96
2022-01-26 02:59:12 C 05 47 04.24 +18 56 02.7 V G96
2022-01-26 03:07:23 C 05 47 03.77 +18 56 01.0 V G96
2022-01-26 03:15:33 C 05 47 03.41 +18 55 58.8 V G96
2022-01-26 03:23:43 C 05 47 02.95 +18 55 57.4 V G96
2025-08-23 11:43:30 C 01 44 38.294 +26 36 12.18 X F52
2025-08-23 12:00:50 C 01 44 38.111 +26 36 15.59 X F52
2025-08-23 12:18:10 C 01 44 37.946 +26 36 18.97 X F52
2025-08-23 12:35:39 C 01 44 37.733 +26 36 22.54 X F52
2025-08-27 11:37:05 C 01 43 29.445 +26 53 23.69 X F52
2025-08-27 12:08:38 C 01 43 28.910 +26 53 28.99 X F52
2025-08-27 12:24:26 C 01 43 28.651 +26 53 31.65 X F52
2025-09-16 10:11:03 C 01 29 02.513 +27 17 27.81 X F52
2025-09-16 10:28:23 C 01 29 01.727 +27 17 26.59 X F52
2025-09-16 10:45:43 C 01 29 00.929 +27 17 25.27 X F52
2025-09-16 11:03:11 C 01 29 00.120 +27 17 24.15 X F52
2025-10-23 06:34:29 C 00 41 32.545 +22 39 07.61 X F52
2025-10-23 06:51:58 C 00 41 31.687 +22 38 59.52 X F52
2025-10-23 07:09:34 C 00 41 30.807 +22 38 51.31 X F52
2025-10-27 04:29:25 C 00 37 14.603 +21 53 16.62 V G96
2025-10-27 04:36:53 C 00 37 14.308 +21 53 13.63 V G96
2025-10-27 04:44:21 C 00 37 13.980 +21 53 09.67 V G96
2025-11-26 07:27:03 C 00 21 00.108 +16 42 59.30 X F52
2025-11-26 07:50:09 C 00 21 00.038 +16 42 51.91 X F52
2025-11-26 08:07:51 C 00 21 00.007 +16 42 46.29 X F52
2025-11-26 08:25:37 C 00 20 59.955 +16 42 40.65 X F52