Contents. planet: 7 - Uranus satellites: U1-Ariel : 42 U2-Umbriel : 47 U3-Titania :306 U4-Oberon : 76 total number: 473 type: absolute dates: 1948-1966 observatory: 711 - McDonald Observatory, Fort Davis 703 - Catalina Sky Survey Reference. Whitaker E., Greenberg R. (1973) Eccentricity and inclination of Miranda's orbit. Communications of the Lunar and Planetary Laboratory. N. 194. P. 70-80. 1973CoLPL__10___70W Informations. relative to: absolute reference frame: astrometric centre of frame: topocentre epoch of equinox: B1950 time scale: UTC reduction: Astrographic Catalogue coordinates: absolute diff. refraction: no information receptor: photographic telescope: 711 - Reflector, D=82 inch 703 - Reflector, D=61 inch observers: Van Biesbroeck data included in standard data file: no Comments. Positions are affected by the uncertainty of the plate constants of the Astrographic Catalogue Format. 1. Year of the moment of observation 2. Month of the moment of observation 3. Day of the moment of observation with decimals 4. Number of satellite 5. Hour of right ascension (alpha, h) 6. Minute of right ascension (alpha, m) 7. Second of right ascension (alpha, s) 8. Degree of declination (delta, deg) 9. Minute of declination (delta, ' ) 10. Second of declination (delta, '' ) 11. Number of observatory (N obs) ------------------------------------------------- Year alpha delta N month N obs day sat h m s deg ' '' -------------------------------------------------