Contents. planet: 7 - Uranus satellites: U1-Ariel : 8 total number: 8 type: relative dates: 1949-1949 observatory: 503 - Cambridge Reference. Steavenson W. H. (1964) The satellites of Uranus The journal of the British Astronomical Association. V. 74. N. 1. P. 54-59 1964JBAA___74___54S 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. Second of the moment of observation 7. Position angle (P), degrees ------------------------------ Year Hour P month minute day seconde degrees ------------------------------