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
2015-05-31 23:30:21 C 09 38 41.20 -01 41 43.6 u 807
2015-05-31 23:38:36 C 09 38 42.42 -01 41 46.8 u 807
2015-05-31 23:46:09 C 09 38 43.48 -01 41 50.6 u 807
2015-05-31 23:53:41 C 09 38 44.60 -01 41 53.6 u 807
2015-06-01 00:01:48 C 09 38 45.75 -01 41 56.9 u 807
2018-09-18 09:14:32 C 02 28 59.13 +29 48 41.6 u H21
2018-09-18 09:29:07 C 02 28 58.74 +29 48 42.6 u H21
2018-11-08 04:22:39 C 01 28 39.97 +24 47 42.1 V G96
2018-11-08 04:30:44 C 01 28 39.59 +24 47 38.1 V G96
2018-11-08 04:38:49 C 01 28 39.17 +24 47 35.6 V G96
2018-11-08 04:46:54 C 01 28 38.73 +24 47 31.1 V G96
2020-06-01 10:56:09 C 23 04 56.34 +00 45 03.7 V G96
2020-06-01 11:00:19 C 23 04 56.61 +00 45 07.5 V G96
2020-06-01 11:04:29 C 23 04 56.86 +00 45 11.3 V G96
2020-06-01 11:08:38 C 23 04 57.14 +00 45 15.0 V G96
2020-07-19 22:50:36 C 23 37 22.63 +14 19 39.8 V C95
2020-07-19 23:17:27 C 23 37 22.17 +14 19 52.9 V C95
2020-07-19 23:44:16 C 23 37 21.81 +14 20 04.9 V C95
2020-07-23 12:20:44 C 23 35 55.76 +14 56 18.8 V T08
2020-07-23 12:25:25 C 23 35 55.68 +14 56 20.5 V T08
2020-07-23 12:30:04 C 23 35 55.53 +14 56 21.9 V T08
2020-07-23 12:40:35 C 23 35 55.27 +14 56 26.2 V T08
2020-07-29 08:53:56 C 23 32 16.35 +15 46 07.3 V G96
2020-07-29 09:01:22 C 23 32 16.07 +15 46 09.2 V G96
2020-07-29 09:08:48 C 23 32 15.81 +15 46 11.5 V G96
2020-08-11 10:43:13 C 23 18 46.722 +16 44 33.04 U F52
2020-08-11 10:45:47 C 23 18 46.06 +16 44 31.7 V G96
2020-08-11 10:53:13 C 23 18 45.67 +16 44 31.8 V G96
2020-08-11 10:58:57 C 23 18 45.822 +16 44 34.25 U F52
2020-08-11 11:00:40 C 23 18 45.23 +16 44 32.1 V G96
2020-08-11 11:14:47 C 23 18 44.935 +16 44 35.11 U F52
2020-08-11 11:20:03 C 23 18 44.15 +16 44 33.0 V G96
2020-08-11 11:30:46 C 23 18 44.041 +16 44 36.12 U F52
2020-08-17 17:02:19 C 23 10 11.46 +16 43 24.3 q D29
2020-08-17 17:08:41 C 23 10 11.06 +16 43 23.7 q D29
2020-08-17 17:22:42 C 23 10 10.17 +16 43 22.9 q D29
2020-08-17 17:29:03 C 23 10 09.76 +16 43 22.8 q D29
2020-08-17 17:43:03 C 23 10 08.89 +16 43 21.0 q D29
2020-08-17 17:49:25 C 23 10 08.53 +16 43 20.7 q D29
2020-08-18 13:37:22 C 23 08 56.040 +16 41 44.70 U F52
2020-08-18 13:53:19 C 23 08 55.024 +16 41 43.20 U F52
2020-08-26 08:30:08 C 22 57 07.670 +16 10 00.43 U F52
2020-08-26 08:48:39 C 22 57 06.464 +16 09 55.95 U F52
2020-08-26 09:07:13 C 22 57 05.201 +16 09 51.61 U F52
2020-08-27 05:56:20 C 22 55 44.76 +16 04 32.5 V G96
2020-08-27 06:03:45 C 22 55 44.26 +16 04 30.8 V G96
2020-08-27 06:11:10 C 22 55 43.78 +16 04 29.2 V G96
2020-08-27 06:18:37 C 22 55 43.30 +16 04 26.9 V G96
2020-08-28 14:59:08 C 22 53 37.18 +15 55 30.5 q D29
2020-08-28 15:19:29 C 22 53 35.86 +15 55 25.4 q D29