Contents.
            asteroid: (50000)Quaoar
          satellites: Weywot   
        total number: 4
                type: position
               dates: 2011-2011
         observatory: 250 - Hubble Space Telescope  
             
Reference.
W. C. Fraser, K. Batygin, M. E. Brown, A. Bouchez. 
The mass, orbit, and tidal evolution of the Quaoar–Weywot system
Icarus. 2013. V. 222. P. 357–363. 
2013Icar..222..357F

Informations.
         relative to: the primary
     reference frame: astrometric ICRF
     centre of frame: topocentric
    epoch of equinox: J2000
          time scale: UTC
           reduction: no information
         coordinates: Relative Delta(RA), Delta(Decl), position of satellite relative to the primary
    diff. refraction: no information (see in publications)
            receptor: 
           telescope: HST                     
              
Comments.
JD of the moment of observation is  JD=Day + 2453000,
the moment  Day= 2719.82856 is  07.06.2011

Format
  1. Day of the moment of observation, JD=2453000+Day  
  2. Delta(RA) - relative right ascension, arcsec
  3. SigX - coordinate errors  Delta(RA), arcsec
  4. Delta(Decl) - relative declination, arcsec
  5. SigY - coordinate errors  Delta(Decl), arcsec

--------------------------------------------
   Day     Delta(RA)  SigX  Delta(Decl) SigY                     
             arcsec   arcsec  arcsec  arcsec    
--------------------------------------------