+--------------------------------+ +--------------------------------+ ASTERIODAL OCCULTATION - REPORT FORM +--------------------------------+ +--------------------------------+ EAON & IOTA-ES EUROPEAN ASTEROIDAL OCCULTATION NETWORK INTERNATIONAL OCCULTATION TIMING ASSOCIATION EUROPEAN SECTION +--------------------------------+ +--------------------------------+ 1. DATE: December 21, 2019 STAR: UCAC4 392-126953 ASTEROID: (51) Nemausa 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: 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: AOTA (enclosed) Event Time (UTC) Accuracy + Comments code: HH:MM:SS.ss S.ss -S : 18:24:55 -D : 18:25:57.72 +/- 0.32 -R : 18:26:02:20 +/- 0.32 -E : 18:27:02 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=x32 , Gain=32, Gamma=1.0 Device of recording: Personal computer Virtualdub software, saved on Harddisk Mode of recording: Integration time=0.64s., CCIR, Time-inserter device: IOTA VTI 7. OBSERVING CONDITIONS Atmospheric transparency: middle-poor (intermit.veil-cloud) Wind : no Star image stability: poor Minor Planet Visible: yes 8. ADDITIONAL COMMENTS Poor conditions because of wery low star position and incoming clouds