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8457 Billgolisch (1981 EO8)
Classification: Main-belt Asteroid          SPK-ID: 2008457
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1653021803073054 5.9473e-08  
a 2.634747727242226 2.2444e-08 AU
q 2.199218183369368 1.6782e-07 AU
i 3.86712215869425 5.9048e-06 deg
node 284.734238354803 0.00012322 deg
peri 158.9885567201457 0.00012722 deg
M 345.083804572994 3.3588e-05 deg
tp 2456865.223582625755
(2014-Jul-26.72358263)
0.00014621 JED
period 1562.093354119364
4.28
1.996e-05
5.465e-08
d
yr
n .2304599779844473 2.9447e-09 deg/d
Q 3.070277271115083 2.6153e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      918  
   data-arc span      13930 days (38.14 yr)  
   first obs. used      1975-12-02  
   last obs. used      2014-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53395  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 19:16:08  

Additional Information
 Earth MOID = 1.21512 AU 
 T_jup = 3.375 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.6 mag n/a MPO267741  
rotation period rot_per 18. h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) lower-limit; Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]

8457 Billgolisch           Discovered 1981 Mar. 1 by S. J. Bus at Siding Spring in the course of the U.K. Schmidt-Caltech Asteroid Survey.
William F. Golisch (b. 1958) has been a telescope operator for the NASA Infrared Telescope Facility on Mauna Kea since 1984. His expertise and dedication to observers have helped facilitate observations used in hundreds of planetary research projects.
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

Alternate Designations
 1981 EO8 = 1975 XX2 = 1979 WR4 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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