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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 86 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3947772276470731 3.7101e-08  
a 1.779862088577887 8.4007e-09 au
q 1.077213067654979 6.7128e-08 au
i 10.41944927148259 7.1777e-06 deg
node 272.9942638059632 3.6712e-05 deg
peri 313.8704150861457 4.1587e-05 deg
M 33.05613569629553 2.347e-05 deg
tp 2458920.860681012335
(2020-Mar-12.36068101)
5.6038e-05 TDB
period 867.3171933636603
2.37
6.1404e-06
1.681e-08
d
yr
n .4150730583396314 2.9386e-09 deg/d
Q 2.482511109500794 1.1717e-08 au
  Orbit Determination Parameters
   # obs. used (total)      310  
   data-arc span      6967 days (19.07 yr)  
   first obs. used      2001-08-10  
   last obs. used      2020-09-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55654  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Sep-11 07:49:45  

Additional Information
 Earth MOID = .115307 au 
 Jupiter MOID = 2.56554 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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