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                ASTERIODAL OCCULTATION - REPORT FORM

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                      EAON & IOTA-ES

              EUROPEAN ASTEROIDAL OCCULTATION NETWORK

   INTERNATIONAL OCCULTATION TIMING ASSOCIATION EUROPEAN SECTION

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1. DATE: 07 Mar 2014
   STAR: HIP 78193
   ASTEROID: (9) Metis

2. OBSERVER
   Name: Stefano SPOSETTI (station 2)
   Address: 6525 GNOSCA - Switzerland
   Email: stefanosposetti@ticino.com

3. OBSERVING STATION 2
   Nearest city: CH-Gnosca
   Longitude: 09d 01m 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 : 03:08:22
    -D : 03:08:48.62 ± 0.015
    -R : 03:09:02.77 ± 0.015
    -E : 03:10:16
    
    Duration: 14.15 s ± 0.030 s

5. TELESCOPE
   Type: Schmidt-Cassegrain, Celestron 11-inch
   Aperture: 280mm
   Focal length: 850mm (with focal reducer)
   Magnification: FOV about 27x21arcmin
   Mount: Equatorial
   Motor drive: No

6. TIMING & RECORDING
   Timekeeping: GPS 1PPS (US Global Sat EM-406A)
   Sensor/Camera: Videocamera WAT-910HX, CCIR, 1/2", ICX429ALL sensor
   Videocamera settings: Shutter=1/50; Gamma=1.00
   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: good
   Wind: no
   Star image stability: good
   Minor Planet Visible: yes, during the event

8. ADDITIONAL COMMENTS

Automatic observation.

Images were intentionally defocused because of the brightness of the target star (7.7 magR).
One comparison star was visible in the field of view.
Tangra was used to analyze the avi-file.
Occular was used to plot the "signal minus background" versus time and evaluate the D and R times. Single frames (and not fields) were used.
Because of the use of an integrating video camera in shutter mode "High1" a correction of -0.020s was used (the so called "Dangl correction").

An image of the lightcurve is posted here:
http://www.sposetti.ch/images/stories/Minor_planets/2014_MAR_7_Metis_Bellinzona_Gnosca_Biasca_Semione.png