Contents. planet: 6 - Saturn satellites: S3-Tethys : 1, S4-Dione : 1, total number: 2 type: relative dates: 2009-2010 observatory: 286 - Yunnan Observatory Reference. Zhang X., Liu Z., Tang Z. (2013) Astrometric results of the mutual events between the Saturn's satellites observed at Yunnan Observatory. Planetary and Space Science. Vol. 76. P. 83-86. 2013P&SS___76___83Z Informations. relative to: reference body (an occulted or eclipsed satellite) S3-Tethys : 1, S4-Dione : 1 reference frame: astrometric centre of frame: heliocentric for mutual eclipse, geocentric for mutual occultation epoch of equinox: J2000 time scale: UTC reduction: from mutual occultations and eclipses coordinates: X, Y (heliocentric for mutual eclipse, geocentric for mutual occultation) diff. refraction: no information receptor: CCD telescope: 1-m telescope (first observation), 60-cm telescope (second observation) observers: no information data included in standard data file: no Comments. Format. 1. Year of observation 2. Month of observation 3. Day of observation 4. The type of the phenomenon (eclipse or occultation) including the satellite numbers. The type of phenomenon is coded as n_a o n_p or n_a e n_p for a mutual occultation or eclipse, respectively Here $n_a$ is the number of the occulting or eclipsing satellite and $n_p$ is that of the occulted or eclipsed satellite 5. Hour of the midtime of the event (UTC) 6. Minute of the midtime of the event (UTC) 7. Second of the midtime of the event with decimals (UTC) 9. X coordinate in arcseconds (heliocentric for mutual eclipse, geocentric for mutual occultation) 10. Y coordinate in arcseconds (heliocentric for mutual eclipse, geocentric for mutual occultation) 11. sigma of X in arcseconds 12. sigma of Y in arcseconds 13. Position angle A (in degrees) corresponding to X, Y 14. Impact parameter I in arcseconds 15. Flux drop at the minimum of the event (F, %) ----------------------------------------------------------------------------------- Year Date Type Midtime X Y sigma X sigma Y A I F Month h m s arcsec arcsec arcsec arcsec deg arcsec % -----------------------------------------------------------------------------------