asteroid: (45)Eugenia
  satellites: 1 - Petit–Prince: 38
              2 - Princesse: 6
total number: 44
        type: position
       dates: 1998-2007
 observatory: 309 - Cerro Paranal (European Southern Observatory, Chile) 
              568 - Mauna Kea (W.M. Keck observatory, the Canada–France–Hawaii Telescope, Hawaii, USA)

F. Marchis, V. Lainey , P. Descamps , J. Berthier , M. Van Dam , 
I. M. Baek, D. Le Mignant, H.B. Hammel, M. Showalter, F. Vachier, 2010
A dynamical solution of the triple asteroid system (45) Eugenia
Icarus. 2010. V. 210. P. 635–643.

         relative to: primary
     reference frame: astrometric ICRF
     centre of frame: topocentre
    epoch of equinox: J2000
          time scale: UTC
           reduction: not available
         coordinates: X, Y (secondary relative to primary)
            receptor: CCD
           telescope: 1 – VLT-UT4 8m (NAOS-CONICA adaptive optics system)
                      2 – Keck 10m with AO system
                      3 - 3.6m CFHT (the Canada-France-Hawaii Telescope AO system)

Comments. 1.The diameters of the moons are estimated by assuming the same surface composition, 
hence albedo, between the primary and the moons.
2. "0.0" means the absence of the parameters.

  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. Nsat - number of satellite
  8. Ntel - number of telescope
  9. Code - Code of observatory
 10. X(arcsec) - relative right ascension
 11. sigmaX(arcsec) - RMS (root mean square error)
 12  Y(arcsec) - relative declination
 13. sigmaY(arcsec) - RMS (root mean square error)
 14. D (km) - diameter of satellite (km)
 15. Elong - Elongation (deg) 
 16. Phase (deg) 

Year        h       Nsat Ntel Code   X     sigmaX   Y    sigmaY  D  Elong  Phase 
    Month     m                    arcsec  arcsec arcsec arcsec  km  deg    deg
        Day      s