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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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1424134049506697 5.5493e-08  
a 2.26680125808117 1.2431e-08 AU
q 1.943978372571369 1.2761e-07 AU
i 3.692105060197027 5.9039e-06 deg
node 298.6385169813641 9.8438e-05 deg
peri 177.2441820130668 0.00010152 deg
M 6.622351284198691 2.485e-05 deg
tp 2456977.568719439197
(2014-Nov-16.06871944)
8.5999e-05 JED
period 1246.575520931146
3.41
1.0254e-05
2.807e-08
d
yr
n .2887911674465525 2.3755e-09 deg/d
Q 2.589624143590972 1.4201e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      848  
   data-arc span      12380 days (33.89 yr)  
   first obs. used      1981-02-09  
   last obs. used      2015-01-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53251  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 00:25:57  

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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