asteroid: (174567)Varda
         satellites: Ilmare
       total number: 12
               type: position
              dates: 2009-2013
        observatory: 250 - Hubble Space Telescope  
                     568 - Mauna Kea (W.M. Keck observatory, Gemini observatory, Hawaii, USA) 
W.M. Grundy, S.B. Porter, S.D. Benecchi, H.G. Roe, K.S. Noll, C.A. Trujillo,
A. Thirouin, J.A. Stansberry, E. Barker, and H.F. Levison.
The Mutual Orbit, Mass, and Density of the Large
Transneptunian Binary System Varda and Ilmare.
Icarus. 2015. V. 257. P. 130-138. 

        relative to: the primary
    reference frame: astrometric ICRF
    centre of frame: topocentric
   epoch of equinox: J2000
         time scale: UTC
          reduction: no information
        coordinates: X, Y (secondary relative to primary)
   diff. refraction: no information (see in publications)
             Ntel 1 -  HST/WFPC2-PC 
             Ntel 2 -  Keck II/NIRC2 
             Ntel 3 -  HST/WFC3-UVIS
             Ntel 4 -  Gemini N./NIRI
 1. Year of the moment of observation  
 2. Month of the moment of observation 
 3. Day of the moment of observation 
 4. h - hour of the moment of observation with decimals
 5. Ntel - number of telescope
 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. Nobs- code of observatory  

Year    Day    h    Ntel   r       R     g       X       SigX       Y      SigY    Nobs                
    Month                  au      au   deg    arcsec   arcsec    arcsec  arcsec