Contents. planet: 7 - Uranus satellites: U1-Ariel : 3, U2-Umbriel : 2, U3-Titania : 14, U4-Oberon : 14 total number: 33 type: relative dates: 1847-1847 observatory: no information References. Lassel W. (1847) Satellites of Uranus Monthly Notices of the Royal Astronomical Society. V. 8. P. 43-44. 1847MNRAS___8___43L Lassel W. (1848) Schreiben des Herrn Lassel an den Herausgeber. Astronomische Nachrichten. V. 27. P. 41-42. 1848AN_____27___41L 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: no information observers: W. Lassel data included in standard data file: no Comments. Year was changed from 1848 to 1847 Some of the data were omitted as very doubtful 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) (999 if not given) 6. Arcmin of P (position angle)(99 if not given) 7. S (separation) in arcsec (-99.99 if not given) ------------------------------------ N Year G.M.T. P sat month arcmin S day deg. arcsec ------------------------------------