Contents. planet: 7 - Uranus satellites: U1-Ariel : 2, U2-Umbriel : 3 total number: 5 type: relative dates: 2007-2007 observatory: 1 - Flavored Meson Observatory, PO Box 6356, Kent, WA 98064, USA 2 - Indian Hill Observatory, PO Box 11, Chagrin Falls, OH 44022, USA 3 - Dept. de Fisica y Matematicas, Universidad de Monterrey, Av. I. Morones Prieto 4500 Pte., Garza Garcia, N.L. Mexico 66238 Reference. Mallama A., Soma M., Sada P. V., Modic R. J., Ellington C. K. (2009) Astrometry of Iapetus, Ariel, Umbriel, and Titania from eclipses and occultations. Icarus, V. 200. P. 265-270. 2009Icar__200__265M Informations. relative to: U1: 1, U2: 2, U3: 2 (reference body is an occulted or eclipsed satellite) reference frame: astrometric centre of frame: topocenter for mutual occultation or heliocenter for mutual eclipse epoch of equinox: J2000 time scale: UTC reduction: from mutual occultations and eclipses coordinates: Delta(R.A.), Delta(Declination) (topocentric for mutual occultation or heliocentric for mutual eclipse) diff. refraction: no information receptor: CCD telescope: 1 - D=25 cm, 2 - D=40 cm, 3 - D=36 cm. observers: 1 - Ellington C.K., 2 - Modic R.J., 3 - Sada P.V. data included in standard data file: no Comments. Data are deduced from the photometric observations of the mutual occultations and eclipses. The coordinates of the observatories are following: 1 - 47.360 deg N, 122.160 deg W, 2 - 41.547 deg N, 81.081 deg W, 3 - 25.623 deg N, 100.346 deg W. Format. 1. Number of satellite, N: 1 - U1, 2 - U2, 3 - U3 2. Type of the phenomena, T: o - mutual occultation, e - mutual eclipse. 3. Number of reference satellite, R: 1 - U1, 2 - U2, 3 - U3 4. Year of observation 5. Month of observation 6. Day of observation 7. Hour of observation, h (UTC) 8. Minutes of observation, m (UTC) 9. Secondes of observation, s (UTC) 10. D(R.A.), arcsec (topocentric for mutual occultation or heliocentric for mutual eclipse) 11. D(Decl.), arcsec (topocentric for mutual occultation or heliocentric for mutual eclipse) 12. Number of observer, observatory, Obs. --------------------------------------------- N R Year day UTC D(R.A.) D(Decl.) T Month h m s arcsec arcsec Obs ---------------------------------------------