Content 

                     asteroid: (182933)2002 GZ_31
                   satellites: companion
                 total number: 1  
                         type: position
                        dates: 2006-2006 
                  observatory: 250 - Hubble Space Telescope
                   
Reference.
Noll, K. S.; Grundy, W. M.; Kern, S. D.; Levison, H. F.; Stephens, D. C.
2002 GZ_31
IAUC8815, 2007

2007IAUC.8815....1N

Informations.
                  relative to: the primary
              reference frame: astrometric ICRF 
              centre of frame: topocentric 
             epoch of equinox: J2000 
                   time scale: UTC 
                    reduction: no information
                  coordinates: s, p (separation, position angle)
             diff. refraction: no information 
                     receptor: 
                    telescope: High Resolution Camera of 
                               the Advanced Camera for Surveys

Comments.  The observations were made during  2006 Apr. 23.352-23.377 UT .
                         We used the mean value.   
Format.                                       
 1. Year of the moment of observation 
 2. Month of the moment of observation  
 3. Day of the moment of observation 
 4. s -separation, arcsec
 5. Sig s - the error of s , arcsec
 6. p - position angle, degree 
 7. Sig p - the error of p, degree
                          
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Year       Day        s     Sig s      p   Sig p    
     Month          arcsec arcsec     deg  degree  
--------------------------------------------------