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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: June 10, 2013
    STAR: TYC 5657-00027-1
    ASTEROID: (640) Brambilla

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; 
    "D"isappearance; 
    "F"lash;
    "E"nd observation;
    "I"nterrupt-end;
    "R"eappearance;
    "O"ther (specify)

    Personal Equation Substracted: Yes, Correction Tables by Gerhard Dangl
    Event Time (UTC)       Accuracy + Comments
    code: HH:MM:SS.ss      S.ss
     -S : 21:23:30 
     -D : 21:24:49.495 +/- 0.05
     -R : 21:24:53.575 +/- 0.05    -
     -E : 21:26:00

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 2 , Gain=max. , Gamma=high
    Virtualdub software, saved on Harddisk
    Mode of recording: Integration time= 0.08 s., CCIR, 
    Time-inserter device: IOTA VTI


7. OBSERVING CONDITIONS
    Atmospheric transparency: middle; irregular veiling cloud 
    Wind: middle
    Star image stability: poor 
    Minor Planet Visible: no

8. ADDITIONAL COMMENTS
    
   Reapparence time sure to 100%
   Disappartence time sure to 90% (because passage of veiling clouds)