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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 : 05/02/2008
 STAR : TYC 0736-01033-1
 ASTEROID : (409) ASPASIA

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: no

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        21:10:00
        D
        R
        E        21:11:20


Timekeeping: via Computer ( "Dimension4" software) .
Mode of recording: I let the star move in the CCD field (from E to W) with RA telescope motors OFF.
Device of recording:  CCD

7.OBSERVING CONDITIONS:
Atmospheric transparency: good
Wind: none at the observatory position
Star image stability: good.

NOTES:
Because of a software problem, I could not take any driftscan image.
So I arranged for a CCD image of 80s with RA telescope motors OFF.
My location was on the northern border of the gound path. From a careful examination of the star trail, no occultation (longer than the sampling time of the trace, i.e.) longer than 0,3s or 0,4s was seen.

Speed of moving star (RA telescope motors OFF) : 0,08s/pixel.
Duration of the CCD image: 80s.
Sampling: 1 pixel = 1,2 arcsec.
FWHM of stars: 5 arcsec.
Time sampling: 0,3s or 0,4s.