Contents. planet: 7 - Uranus satellites: U1-Ariel :745, U2-Umbriel :735, U3-Titania :368, U5-Miranda :750 total number: 2598 type: relative dates: 1995-1998 observatory: 874 - Itajuba (Laboratorio Nacional de Astrofisica) Reference. Veiga C. H., Vieira Martins R. (1999) CCD astrometric observations of Uranian satellites: 1995-1998. Astronomy and Astrophysics Supplement. V. 138. P. 247-251. 1999A&AS__138__247V Informations. relative to: U4 - Oberon : 2598 reference frame: astrometric centre of frame: topocentre epoch of equinox: J2000 time scale: UTC reduction: no information coordinates: X, Y diff. refraction: no information receptor: CCD telescope: Reflector, D = 1.6 m observers: Veiga C.H., Vieira Martins R. data included in standard data file: no Comments. Observed positions are compared with the calculated positions from GUST86. The standard deviations are better than 0.05" for the four largest satellites and 0.08" for Miranda. Based on observations made at Laboratorio Nacional de Astrofisica/CNPq/MCT-Itajuba-Brazil. 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. X, arcsec, for U5-Miranda (999.999 - the data are absent) 5. Y, arcsec, for U5-Miranda (999.999 - the data are absent) 6. X, arcsec, for U1-Ariel (999.999 - the data are absent) 7. Y, arcsec, for U1-Ariel (999.999 - the data are absent) 8. X, arcsec, for U2-Umbriel (999.999 - the data are absent) 9. Y, arcsec, for U2-Umbriel (999.999 - the data are absent) 10. X, arcsec, for U3-Titania (999.999 - the data are absent) 11. Y, arcsec, for U3-Titania (999.999 - the data are absent) ---------------------------------------------------------------------------------- Year UTC X Y X Y X Y X Y month day U5-Miranda U1-Ariel U2-Umbriel U3-Titania with decimals arcsec arcsec arcsec arcsec ----------------------------------------------------------------------------------