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8458 Georgekoenig (1981 EY9)
Classification: Main-belt Asteroid          SPK-ID: 2008458
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1424134101499641 5.6972e-08  
a 2.266801256081027 1.4333e-08 AU
q 1.943978359070306 1.3239e-07 AU
i 3.692104374837284 5.9244e-06 deg
node 298.6384814988206 0.00010568 deg
peri 177.2442157875554 0.00010876 deg
M 6.622354253458091 2.7984e-05 deg
tp 2456977.568709187864
(2014-Nov-16.06870919)
9.6809e-05 JED
period 1246.575519281246
3.41
1.1823e-05
3.237e-08
d
yr
n .2887911678287808 2.7391e-09 deg/d
Q 2.589624153091748 1.6375e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      820  
   data-arc span      12281 days (33.62 yr)  
   first obs. used      1981-02-09  
   last obs. used      2014-09-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53273  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 14:12:52  

Additional Information
 Earth MOID = .960338 AU 
 T_jup = 3.599 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.7 mag n/a MPO267741  

8458 Georgekoenig           Discovered 1981 Mar. 1 by S. J. Bus at Siding Spring in the course of the U.K. Schmidt-Caltech Asteroid Survey.
George Koenig (b. 1945) is the observatory superintendent for the NASA Infrared Telescope Facility on Mauna Kea, Hawaii. As a member of the IRTF summit day crew since 1983, he has worked to ensure that the telescope and its infrastructure are maintained and operational.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120506/MPCPages.arcLast Updated: 2012-05-09

[ show close-approach data ]
Alternate Designations
 1981 EY9 = 1991 CV 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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