Contents. planet: 7 - Uranus satellites: U1-Ariel : 34, U2-Umbriel : 33, U3-Titania : 34, U4-Oberon : 34, U5-Miranda : 4 total number: 139 type: relative dates: 1984-1986 observatory: 689 - U.S. Naval Observatory, Flagstaff Reference. Walker R. L., Harrington R. S. (1988) Positions of planets and natural satellites. III. Astronomical Journal. V. 95. P. 1562-1566. 1988AJ_____95_1562W Informations. relative to: planet reference frame: astrometric centre of frame: topocentre epoch of equinox: Date time scale: UTC reduction: Catalog SAO coordinates: X, Y diff. refraction: excluded receptor: photographic telescope: Reflector, D=155 cm observers: Walker R. L., Harrington R. S. data included in standard data file: no Comments. Columns X and Y were exchanged in the paper before the date JD=2446244 Format. 1. JD of the moment of observation with decimals 2. Number of satellite 3. X, arcsec 4. Y, arcsec ---------------------------------- JD N X Y (UTC) sat arcsec arcsec ----------------------------------