Contents. planet: 7 - Uranus satellites: U1-Ariel : 4, U2-Umbriel : 7, U3-Titania :170, U4-Oberon :169 total number: 350 type: relative dates: 1880-1892 observatory: 786 - U.S. Naval Obs., Washington (since 1893) 787 - U.S. Naval Obs., Washington (before 1893) References. Astronomical and Meteorological Observations made during the year 1880 at the United States Naval Observatory. Washington: Government printing office. 1884. Results of observations made with the XXVI - inch Equatorial. Results of observations of the satellites of Uranus. P. 105. 1884PUSNO1880__105U Astronomical and Meteorological Observations made during the year 1881 at the United States Naval Observatory. Washington: Government printing office. 1885. Results of observations made with the XXVI - inch Equatorial. Results of observations of the satellites of Uranus. P. 109-110. 1885PUSNO1881__109U Astronomical and Meteorological Observations made during the year 1882 at the United States Naval Observatory. Washington: Government printing office. 1885. Results of observations with the XXVI - inch Equatorial. Results of observations of the satellites of Uranus. P. 107-108. 1885PUSNO1882__107U Astronomical and Meteorological Observations made during the year 1883 at the United States Naval Observatory. Washington: Government printing office. 1887. Results of observations with the XXVI - inch Equatorial. Results of observations of the satellites of Uranus. P. 135-136. 1887PUSNO1883__135U Astronomical and Meteorological Observations made during the year 1884 at the United States Naval Observatory. Washington: Government printing office. 1889. Results of observations with the XXVI - inch Equatorial. Results of observations of the satellites of Uranus. P. 203-204. 1889PUSNO1884__203U Astronomical and Meteorological Observations made during the year 1892 at the United States Naval Observatory. Washington: Government printing office. 1899. Results of observations with the 26 - inch telescope. Satellites of Uranus. P. 203-204. 1899PUSNO1892__203U Informations. relative to: planet reference frame: apparent centre of frame: topocentre epoch of equinox: date time scale: Washington Mean Time reduction: no information coordinates: position angle and separation diff. refraction: not excluded receptor: micrometric telescope: Equatorial, D=26 inch observers: USNO 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 5. Hour of the observation 6. Minute of the observation with decimals 7. P (position angle) in degrees (999.9 if not given) 8. S (separation) in arcsec (-99.99 if not given) -------------------------------------- Year W.M.T. N month h m P S sat day degrees arcsec --------------------------------------