asteroid: (55637)2002 UX25                                                    
          satellites: companion                                                
        total number: 6                                                       
                type: position                                                 
               dates: 2005-2005                                                
         observatory: 250 - Hubble Space Telescope                         
                      568 - Mauna Kea (W.M. Keck observatory, Hawaii, USA) 

Brown, M. E.
The Density of Mid-sized Kuiper Belt Object 2002 UX25 and the Formation of the Dwarf Planets.
The Astrophysical Journal Letters. 2013. V. 778. Issue 2. Article id. L34, 5 pp.

         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)
            receptor: adaptive optics
           telescope: 1. HST/HRC
                      2. Keck/NIRC2

     The relative coordinates are mentioned as R.A. Offset, Decl. Offset. 
     JD = 2453608.5 is 0h 26/08/2005
 1. Date - JD
 2. X - (secondary relative to primary), mas
 3. SigX - the error of X , mas
 4. Y - (secondary relative to primary), mas
 5. SigY - the error of Y , mas
 6. Ntel - number of telescope 
 7. m - relative brightness, %
 8. Sig m - the error of m 
 9. Nobs - code of observatory

Date            X     Sig X     Y   Sig Y  Ntel   m  Sig m   Nobs
JD (UTC       (mas)   (mas)   (mas) (mas)        (%)