Contents.

            asteroid: (136199)Eris  
          satellites:  Dysnomia   
        total number: 7
                type: position
               dates: 2006-2008
         observatory: 250 - Hubble Space Telescope  
                      568 - Keck LGS, Mauna Kea 

Reference.
Brown, Michael E.; Schaller, Emily L.
The Mass of Dwarf Planet Eris
Science, Volume 316, Issue 5831, pp. 1585- (2007)
2007Sci...316.1585B

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 (see in publications)
            receptor: 
           telescope: 250 - HST 
                      568 - Keck, Mauna Kea

Comments.

The Julian date of moment of observation  JD=2453624.02
is  10.09.2005 
 
Format
  1. T - Julian date of moment of observation with decimals 
  2. Delta(RA) - relative right ascension, arcsec
  3. SigX - coordinate errors in Delta(RA), arcsec
  4. Delta(Dec) - relative declination, arcsec
  5. SigY - coordinate errors in Delta(Dec), arcsec
  6. Code obs. - code of observatory 

----------------------------------------------------
  JD      Delta(RA) SigX Delta(Dec)  SigY   Code        
           arcsec  arcsec  arcsec  arcsec   obs.
----------------------------------------------------