Contents. planet: 7 - Uranus satellites: U2 Umbriel : 5, U3 Titania : 6, U4 Oberon : 3 total number: 14 type: relative dates: 2005-2005 observatory: B05 - Ka-Dar Observatory, Barybino Reference. Izmailov I. S., Korotkii S. A., Ereshko M. V., Stepura A. V. (2007) Astrometric Observations of the Second, Third, and Fourth Satellites of Uranus. Solar System Research. V. 41. P. 42-45. 2007SoSyR__41___42I Informations. relative to: U2 Umbriel: 3, U3 Titania: 4, U4 Oberon: 7 reference frame: astrometric centre of frame: topocentre epoch of equinox: J2000 time scale: UTC reduction: UCAC2 star catalog coordinates: X, Y diff. refraction: no information receptor: CCD telescope: Reflector, D=0.356 m observers: Izmailov I. S., Korotkii S. A., Ereshko M. V., Stepura A. V. data included in standard data file: no Comments. no information Format. 1. Number of satellite (N sat), 2-U2 Umbriel, ... 2. Number of reference satellite (N ref), 2-U2 Umbriel, ... 3. Year of the moment of observation 4. Month of the moment of observation 5. Day of the moment of observation with decimals 6. X observed, arcsec 7. Y observed, arcsec -------------------------------------------- N Year UTC X Y sat N month day ref with decimals arcsec arcsec --------------------------------------------