Content
    asteroid: 2001 QW322 (Northern component(b) 
   satellite; companion (Southern component (a)
total number: 47
        type: position
       dates: 2001-2007
 observatory: 568 - Mauna Kea (CFHT, Gemini Observatory, Hawaii, USA)
              I11 - Gemini South observatory, Cerro Pachon               
              309 - European Southern Observatory (ESO, Chile),
              675 - Palomar Mountain 
              695 - Kitt Peak (WIYN Observatory). 
              696 - Whipple Observatory, Mt. Hopkins (MMT observatory)
              950 - La Palma (4.2-m William Herschel Telescope)
              809 - La Silla Observatory
                               
Reference
J.-M. Petit, J.J. Kavelaars, B.J. Gladman, J.L. Margot, P.D. Nicholson, R.L. Jones, 
J.Wm. Parker, M.L.N. Ashby, A. Campo Bagatin, P. Benavidez, J. Coffey, P. Rousselot, 
O. Mousis, P.A. Taylor.
The Extreme Kuiper Belt Binary 2001 QW322.
Science. 2008. V. 322. P. 432-434. 
2008Sci...322..432P

Information
        relative to: center of mass of the binary
    reference frame: astrometric ICRF
    centre of frame: topocenter 
   epoch of equinox: J2000              
         time scale: UTC
          reduction: not available
        coordinates: Sep, PA
           receptor: CCD
         telescopes: 1 - CFHT 3.6m
                     2 - Hale 5m telescope (Palomar obs.) 
                     3 – VLT 8m (ESO)
                     4 – MPG/ESO 2.2m telescope
                     5 - Gemini-N 8m telescope 
                     6 - Gemini-S 8m telescope 
                     7 - WIYN 3.5m telescope
                     8 - WHT 4.2m (William Herschel Telescope) 
                     9 - MMT 6,5m (Multiple Mirror Telescope) 
                     
Comments.
1. PA; origin is North, positive values to the East)  
2. The position (RA and DEC) is given for the center of mass of the binary, assuming equal masses for the components.
3. The “delta(Sep)” column give the uncertainty estimate on the separation
4. The uncertainty on the position angle (not given here) is simply delta(Sep) divided by Sep, in radian.            

Format
     1.	Year of the moment of observation
     2.	Month of the moment of observation
     3.	Day of the moment of observation with decimals
     4.	RA - right ascension (h m s) of the center of mass
     5.	DEC - declination (deg ' ") of the center of mass
     6.	Sep(arcsec) - separation
     7.	PA(deg) - position angle
     8.	delta(Sep) (arcsec) - the uncertainty estimate on the separation 
     9.	Ntel - number of telescope
    10. Code - Code of observatory
 
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Year      Day         RA            DEC        Sep     PA delta(Sep) Ntel Code
   Month             h  m  s       deg '  "   arcsec  deg   arcsec
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