+--------------------------------+ +--------------------------------+ ASTERIODAL OCCULTATION - REPORT FORM +--------------------------------+ +--------------------------------+ EAON & IOTA-ES EUROPEAN ASTEROIDAL OCCULTATION NETWORK INTERNATIONAL OCCULTATION TIMING ASSOCIATION EUROPEAN SECTION +--------------------------------+ +--------------------------------+ 1. DATE: April 25, 2013 STAR: TYC 0844-00294-1 ASTEROID: (255) Oppavia 2. OBSERVER Name: Alberto OSSOLA Address: 6933 Muzzano (Switzerland) Email: aossola@bluewin.ch 3. OBSERVING STATION Nearest city: CH-6900 Lugano Longitude: 8d 55m 10.5s (E) Latitude: 45d 59m 50.6s (N) Altitude: 350m (From: Google Earth) 4. TIMING OF EVENTS Occultation recorded: Negative Type of event: "S"tart observation; 20:13:25 UT "I"nterrupt-start; "D"isappearance; "B"link; "F"lash; "E"nd observation; 20:16:59 UT "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 : -D : -R : -E : 5.TELESCOPE: Type: Schmidt Cassegrain Aperture: 230mm Focal lenght: 1400 (focal reducer f:6,3) Magnification: - Filters: no Mount: equatorial Motor drive: yes 6. TIMING & RECORDING Sensor/Camera: Videocamera WAT-120N+, CCIR, 1/2" Sony CCD-Sensor ICX419ALL Videocamera settings: Shutter mode=SLOW 3 , Gain=max. , Gamma=high Device of recording: Personal computer Virtualdub software, saved on Harddisk Mode of recording: Integration time=0.160 s., CCIR, Time-inserter device: IOTA VTI 7. OBSERVING CONDITIONS Atmospheric transparency: middle Wind: no Star image stability: middle Minor Planet Visible: no 8. ADDITIONAL COMMENTS