+--------------------------------+ +--------------------------------+ ASTERIODAL OCCULTATION - REPORT FORM +--------------------------------+ +--------------------------------+ EAON & IOTA-ES EUROPEAN ASTEROIDAL OCCULTATION NETWORK INTERNATIONAL OCCULTATION TIMING ASSOCIATION EUROPEAN SECTION +--------------------------------+ +--------------------------------+ 1. DATE: August 15, 2021 STAR: UCAC4 543-005836 ASTEROID: (219) Thusnelda 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; "I"nterrupt-start; "D"isappearance; "B"link; "F"lash; "E"nd observation; "I"nterrupt-end; "R"eappearance; "O"ther (specify) Personal Equation Substracted: Event Time (UTC) Accuracy + Comments code: HH:MM:SS.ss S.ss -S : 03:02:00 -D : -R : -E : 03:05:03 5.TELESCOPE: Type: Schmid Cassegrrain Aperture: 230 mm Focal lenght: ca. 700mm (focal reducer F:6.3 and f:5) Magnification: - Filters: no Mount: equatorial Motor drive: yes 6. TIMING & RECORDING Sensor/Camera: Videocamera 910HX/RC, CCIR, 1/2" EXWiew HAD CCD II Videocamera settings: Shutter mode=x16 , Gain=38, Gamma=1 Device of recording: Personal computer Virtualdub software, saved on Harddisk Mode of recording: Integration time=0.32s., CCIR, Time-inserter device: IOTA VTI 7. OBSERVING CONDITIONS Atmospheric transparency: good Wind :- Star image stability: good Minor Planet Visible: yes 8. ADDITIONAL COMMENTS