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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/SEPT/2006
 STAR : TYC 1879-02151-1
ASTEROID : (144) Vibilia
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
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        01:28:45
        D        01:32:05.5     ± 0.2s
        R        01:32:10.6    ± 0.2s
        E        01:36:30
Duration of the occultation: 5.10s ± 0,1s

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

7.OBSERVING CONDITIONS:
Atmospheric transparency: good/fair
Wind: none
Star image stability: poor
Temperature: +14 deg C

8.ADDITIONAL COMMENTS:
This report corrects and substitute the last one because of timing problems.

The image stability and the seeing were poor.
The dimming of the light of the target was difficult to notice on the drift-scan
image.
The sampling of the drift-scan image was 0.01s/pixel.
I put an elaborated image of the scan here:
http://aida.astroinfo.org/displayimage.php?pos=-2521

This is my 4th positive occultation from my fixed observatory since 2000.