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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 : DEC 11 2010
 STAR :    UCAC2 43911923
 ASTEROID : (249) Ilse

2.OBSERVER:
Name: Stefano SPOSETTI
Address: CH-6525 Gnosca, Switzerland
E-mail: stefanosposetti@ticino.com

3.OBSERVING STATION:
Nearest city: CH-6500 Bellinzona
Station: Gnosca Observatory
Longitude: 46deg 13min 53.2sec (N)
Latitude: 9deg 1min 26.5sec (E)
Altitude: 260 m
Single/Multiple: single

5.TELESCOPE:
Type: Newtonian
Aperture: 40cm f/4
Magnification: -
Mount: equatorial
Motor drive: yes

6.TIMING & RECORDING:
        Occultation recorded: POSITIVE
        Personal Equation Substracted: No because of electronic timing
        Event Time in UT
        Code:        HH:MM:SS.ss  S.ss
        Code:        HH:MM:SS.ss  S.ss
        S            20:43:10
        D         20:45:45.4 +-0.3
        R         20:45:52.8 +-0.3
        E            20:48:50
Duration: 6.8s +-0.1s

Timekeeping: via Computer ("Dimension4" software)
Mode of recording: CCD drift-scan ("Winscan 207" software)
Device of recording:  CCD (SBIG ST8XME)

7.OBSERVING CONDITIONS:
Atmospheric transparency: good
Wind: yes, high altitude and some at the observatory
Star image stability: fair
Driftscan speed at 0.01s/line
Sampling: 1.2arcsec/pixel
FWHM of stars: 7arcsec

8. NOTES:
A CCD-scan is visible here
http://web.ticino.com/sposetti/_249_Ilse_10dic2010_Gnosca.PNG