Content 

               asteroid: (225088)2007 OR10
             satellites: companion
           total number: 4
                   type: position
                  dates: 2017
            observatory: 250 - Hubble Space Telescope  

Reference.
  Kiss C. et al. (2019)
  The mass and density of the dwarf planet (225088) 2007 OR10
  Icarus (In Press)
  2019arXiv190305439K

Informations.
            relative to: the primary
        reference frame: astrometric ICRF
        centre of frame: topocentric
       epoch of equinox: J2000
             time scale: UTC
              reduction: no information 
            coordinates: Delta(RA), Delta(Dec)
       diff. refraction: no information 
               receptor: 
              telescope: WFC3/UVIS camera system with the UVIS2-C512C-SUB aperture,
                         the F350LP and either the F606W or the F814W filters 

Comments.

Format.
 1. MJDs - Modified Julian Day of start of exposure
 2. MJDe - Modified Julian Day of end of exposure
 3. D(RA) - relative right ascension, mas
 4. SigX - the error of D(RA), mas
 5. D(Dec) - relative declination, mas 
 6. SigY - the error of D(Dec), mas
  
------------------------------------------------
MJDs        MJDe         D(RA) SigX  D(Dec) SigY
                          mas   mas    mas   mas
------------------------------------------------