asteroid: (58534)Logos  
           satellite: Zoe
        total number: 9
                type: position
               dates: 2001-2007
         observatory: 250 - Hubble Space Telescope

W.M. Grundy, K.S. Noll, F. Nimmo, H.G. Roe, M.W. Buie,
S.B. Porter, S.D. Benecchi, D.C. Stephens, H.F. Levison, and J.A. Stansberry
Five New and Three Improved Mutual Orbits of Transneptunian Binaries.
Icarus. 2011. V. 213. Issue 2. P. 678-692.

         relative to: primary
     reference frame: astrometric ICRF
     centre of frame: topocenter 
    epoch of equinox: J2000              
          time scale: UTC
           reduction: not available
         coordinates: X, Y (secondary relative to primary)
    diff. refraction: no information 
            receptor: CCD
           Ntel  1 - ACS (HST HRC/ACS (High-Resolution Camera of the Advanced Camera for Surveys)      
           Ntel  2 - WFPC2 ( HST WFPC2/PC (Planetary Camera of the Wide Field and Planetary Camera 2)     
           Ntel  3 - NICMOS (HST NICMOS (Near Infrared Camera and Multi-Object Spectrometer)     
           Ntel  4 - WFPC2(WF3)  ( WFC3/UVIS (Wide Field Camera 3)

  1. Year of the moment of observation
  2. Month of the moment of observation
  3. Day of the moment of observation
  4. Hour of the moment of observation with decimals, h
  5. Number of telescope, Ntel
  6. r - the distance from the Sun to the target, au
  7. R - the distance from the observer to the target, au
  8. g - the phase angle - the solar phase angle, degrees
  9. X - relative right ascension, arcsec
 10. SigX - the error of X, arcsec
 11. Y - relative declination, arcsec 
 12. SigY - the error of Y, arcsec
 13. Vprim - visual magnitude for primary body, -99.9 if value is not given
 14. sigVp - estimated uncertainties of Vprim, 0.0 if value is not given
 15. Vsec - visual magnitude for secondary body, -99.9 if value is not given
 16. SigVs - estimated  uncertainties of Vsec, 0.0  if value is not given

--------------------------------------------------------------- ---------------------------------------------------
Year   Day  h  Ntel   r      R        g      X       SigX        Y       SigY    Vprim     SigVp  Vsec    SigVs   
  Month               au     au      deg   arcsec   arcsec     arcsec   arcsec