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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1657100386199473 4.1934e-08  
a 2.635936224235242 1.4098e-08 AU
q 2.199135130717502 1.1138e-07 AU
i 3.866368381688611 5.7059e-06 deg
node 284.7342360969024 0.00010094 deg
peri 158.9680211418189 0.0001052 deg
M 31.16708746356422 2.7858e-05 deg
tp 2456865.169871727821
(2014-Jul-26.66987173)
0.0001207 JED
period 1563.150430239557
4.28
1.254e-05
3.433e-08
d
yr
n .2303041300668862 1.8476e-09 deg/d
Q 3.072737317752982 1.6434e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1121  
   data-arc span      14438 days (39.53 yr)  
   first obs. used      1975-12-02  
   last obs. used      2015-06-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51674  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 11:59:24  

Additional Information
 Earth MOID = 1.21543 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 13.7 mag n/a MPO337327  
rotation period rot_per 135. h n/a LCDB (Rev. 2015-July); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J., in press.]

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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