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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 : 19/02/2009
 STAR : TYC 0849-01304-1
 ASTEROID : (90) Antiope

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
Latitude: 46deg 13min 54sec (N)
Longitude: 9deg 1min 30sec (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:   NEGATIVE
        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            23:03:30
        D
        R
        E            23:09:00


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: none at the observatory position
Star image stability: good
Driftscan speed at 0,05s/pixel
Sampling: 1 pixel = 1.2 arcsec
FWHM of stars = 6.0arcsec
The Sky Quality Meter pointed in the target zone indicated 20.5mag

8. NOTES:
The 12.1magV star-trace is easily visible in the CCD drift scan.
By eye inspection of the trace I consider the time resolution of the drift-scan
image no better than 5 pixels, ie. about 0.25s. No  occultation occured in a
time duration higher than this resolution.