Contents. planet: 7 - Uranus satellites: U1-Ariel : 17, U2-Umbriel : 6, U3-Titania : 17, U4-Oberon : 18 total number: 58 type: absolute dates: 1990-1990 observatory: 188 - Majdanak Reference. Communication from the observers Informations. relative to: absolute reference frame: astrometric centre of frame: topocenter epoch of equinox: J2000 time scale: UTC reduction: Catalogue Tycho-2 coordinates: absolute diff. refraction: no information receptor: photographic telescope: Reflector, D=0.6 m observers: Kulyk I., Izakevich E.M., Shatokhina S, data included in standard data file: no Comments. Format. 1. Number of satellite (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. 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, '' ) ---------------------------------------------- N month alpha delta sat day h m s deg ' '' year with decimals ----------------------------------------------