Contents.
      planet: 7 - Uranus  
  satellites: U1-Ariel   : 12,
              U2-Umbriel :  9,
              U3-Titania : 13,
              U4-Oberon  : 13
total number: 47
        type: relative
       dates: 1851-1851
 observatory: no information

References.
   Lassel W. (1851)
   On the interior satellites of Uranus.
   Monthly Notices of the Royal Astronomical Society. V. 12. P. 15-17.
   1851MNRAS__12___15L
   Lassel W. (1852)
   Observations of the satellites of Uranus with the 20-feet equatoreal.
   Monthly Notices of the Royal Astronomical Society. V. 12. P. 152-152.
   1852MNRAS__12__152L
   Lassel W. (1852)
   Beobachtungen der Uranus-Satelliten.
   Astronomische Nachrichten. V. 34. P. 325-328.
   1852AN_____34__325L

Informations.
         relative to: planet
     reference frame: apparent
     centre of frame: topocentre
    epoch of equinox: date
          time scale: Grinwich Mean Time
           reduction: no information
         coordinates: position angle and separation
    diff. refraction: no information
            receptor: micrometric
           telescope: Equatorial, D= 20-feet
           observers: W. Lassel
 data included in standard data file: no

Comments.
          no information

Format.
  1. Observed satellite number (N sat)
  2. Year    of the moment of observation
  3. Month   of the moment of observation
  4. Day     of the moment of observation with decimals 
  5. Degrees of P (position angle) in degrees (999 if not given)
  6. Arcmin  of P (position angle) in degrees (99 if not given)
  7. S (separation) in arcsec (-99.99 if not given)
 
-----------------------------------
N  Year                P        
sat  month          deg.       S  
          day        arcmin  arcsec
-----------------------------------