+--------------------------------+ +--------------------------------+ ASTERIODAL OCCULTATION - REPORT FORM +--------------------------------+ +--------------------------------+ EAON & IOTA-ES EUROPEAN ASTEROIDAL OCCULTATION NETWORK INTERNATIONAL OCCULTATION TIMING ASSOCIATION EUROPEAN SECTION +--------------------------------+ +--------------------------------+ 1. DATE: 06 FEB 2013 STAR: 2UCAC 40191357 ASTEROID: (31) Euphrosyne 2. OBSERVER Name: Stefano SPOSETTI Address: CH-6525 GNOSCA Email: stefanosposetti@ticino.com 3. OBSERVING STATION Nearest city: CH-6500 Bellinzona Longitude: 9d 1m 26.5s (E) Latitude: 46d 13m 53.2s (N) Altitude: 260m (WGS84) 4. TIMING OF EVENTS Occultation recorded: POSITIVE Type of event: ("S"tart observation; "I"nterrupt-start; "D"isappearance; "B"link; "F"lash; "E"nd observation; "I"nterrupt-end; "R"eappearance; "O"ther (specify)) Personal Equation Substracted: No Event Time (UTC) Accuracy + Comments code: HH:MM:SS.ss S.ss -S : 01:40:51 -D : 01:45:21.87 ± 0.03s -R : 01:45:39.18 ± 0.03s -E : 01:47:23 Duration: 17.31s ± 0.06s 5. TELESCOPE: Type: Newtonian Aperture: 400mm Focal length: 930mm (with focal reducer) Field of view: 23x18arcmin Mount: equatorial Motor drive: yes 6. TIMING & RECORDING Timekeeping: GPS 1PPS (US Global Sat EM-406A) Sensor/Camera: Videocamera WAT-902H Ultimate, 1/2" Sony CCD-Sensor ICX429ALL Videocamera settings: AGC=LO, Gamma=OFF Device of recording: Personal computer, Imaging Source DFG/SV1 PCI, S-video, Virtualdub software, saved on Harddisk Mode of recording: Integration time=0.040s, CCIR, Huffyuv Time insertion device: IOTA-VTI, v.1.1.42 7. OBSERVING CONDITIONS Atmospheric transparency: fair/good Wind: no Star image stability: good Minor Planet Visible: no 8. ADDITIONAL COMMENTS Automatic observation. Tangra software was used to plot the lightcurve. Occular v.4.00 was used to calculate the D and R times. A lightcurve can be seen here: http://sposetti.ch/images/stories/Minor_planets/2013_Feb_6_Euphrosyne_Gnosca_Iragna.png