Contents. planet: 7 - Uranus satellites: U1-Ariel : 23, U2-Umbriel: 3, U3-Titania: 2, U4-Oberon : 2 total number: 30 type: relative dates: 1947-1948 observatory: 503 - Cambridge Reference. Steavenson W. H. (1948) Observations of the Satellites of Uranus. Monthly Notices of the Royal Astronomical Society. V. 108. P. 183-185 1948MNRAS_108__183S Informations. relative to: planet reference frame: astrometric centre of frame: topocentre epoch of equinox: B1950 time scale: UTC reduction: see article coordinates: Position angle diff. refraction: no information receptor: photographic telescope: Reflector, D=30 inch observers: Steavenson W. H. data included in standard data file: no Comments. no information Format. 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. N of satellite 7. Position angle (P), degrees ------------------------------ Year Hour N P month minute sat day degrees ------------------------------