asteroid: (121)Hermione
       satellite: S/2001(121)1
    total number: 7
            type: position
           dates: 2006 - 2008
     observatory: 309 - Cerro Paranal (ESO, Chile) 
                  568 - Mauna Kea (the Keck observatory, Hawaii, USA) 

Descamps, P.; Marchis, F.; Durech, J.; Emery, J.; Harris, A. W.; Kaasalainen, M.;
Berthier, J.; Teng-Chuen-Yu, J.-P.; Peyrot, A.; Hutton, L.; Greene, J.; Pollck, J.; 
Assafin, M.; Vieira-Martins, R.; Camargo, J. I. B.; Braga-Ribas, F.; Vachier, F.; 
Reichart, D. E.; Ivarsen, K. M.; Crain, J. A.; Nysewander, M. C.; Lacluyze, A. P.; 
Haislip, J. B.; Behrend, R.; Colas, F.; Lecacheux, J.; Bernasconi, L.; Roy, R.; 
Baudouin, P.; Brunetto, L.; Sposetti, S.; Manzini, F. 2009
New insights on the binary Asteroid 121 Hermione.  
Icarus. 2009. V. 203. Issue 1. P. 88-101.

        relative to: primary
    reference frame: astrometric ICRF
    centre of frame: topocenter 
   epoch of equinox: J2000              
         time scale: UTC
          reduction: not available
        coordinates: X, Y (secondary relative to primary)
           receptor: CCD 
         telescopes: 1 - NAOS (Nasmyth AO System) Yepun-UT4 telescope (VLT)
                     2 - Keck II AO system with the NIRC2 infrared camera

The root mean square error (RMS) of the whole set of data is of 28 mas in X and 36 mas in Y

  1. Year of the moment of observation
  2. Month  of the moment of observation
  3. Day    of the moment of observation
  4. Hour   of the moment of observation
  5. Minute of the moment of observation
  6. Second of the moment of observation
  7. X (arcsec) - relative right ascension
  8. Y (arcsec)- relative declination
  9. Ntel - the number of telescope
 10. Code obs - Code 0f observatory
 Year        h            X        Y     Ntel  Code 
    Month       m                                      
        Day        s  (arcsec)  (arcsec)        obs