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JPL Small-Body Database Browser
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173689 (2001 PK9)
Classification: Amor [NEO]          SPK-ID: 2173689
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 74 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3947619944780503 6.0732e-08  
a 1.779860427048533 1.6576e-08 au
q 1.0772391749743 1.1565e-07 au
i 10.41960071805698 1.1227e-05 deg
node 272.9949462490158 3.9359e-05 deg
peri 313.8553434195732 4.3107e-05 deg
M 227.0395063289705 2.8429e-05 deg
tp 2458920.829890891640
(2020-Mar-12.32989089)
7.2461e-05 TDB
period 867.3159788825081
2.37
1.2116e-05
3.317e-08
d
yr
n .4150736395561874 5.7983e-09 deg/d
Q 2.482481679122766 2.3119e-08 au
  Orbit Determination Parameters
   # obs. used (total)      257  
   data-arc span      6299 days (17.25 yr)  
   first obs. used      2001-08-10  
   last obs. used      2018-11-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56609  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Dec-22 06:55:32  

Additional Information
 Earth MOID = .115194 au 
 Jupiter MOID = 2.56586 au 
 T_jup = 3.980 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 18.3   n/a MPO338380  
diameter diameter 0.724 km 0.226 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.161   0.095 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

173689 (2001 PK9)          Discovered 2001-Aug-10 by NEAT at Palomar
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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