+--------------------------------+ +--------------------------------+

                ASTERIODAL OCCULTATION - REPORT FORM

+--------------------------------+ +--------------------------------+

                      EAON & IOTA-ES

              EUROPEAN ASTEROIDAL OCCULTATION NETWORK

   INTERNATIONAL OCCULTATION TIMING ASSOCIATION EUROPEAN SECTION

+--------------------------------+ +--------------------------------+

1 DATE : 02/05/2009
 STAR : 2UCAC 30701154
 ASTEROID : (227) Philosophia

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            20:05:00
        D
        R
        E            20:30:00


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: fair, some clouds passing
Wind: none
Star image stability: good
Driftscan speed at 0,05s/pixel
Sampling: 1 pixel = 1.2 arcsec
FWHM of stars = 6 arcsec

8. NOTES:
The trace of the 12.9magV star + 13.2 mag asteroid was barely visible in the CCD
drift scan. Moonlight (25deg away) was also interfering. The sky was far than
perfect: some thin bright clouds covered the target during the 25 minutes driftscan.
A dark scan was subtracted from the original one.
A careful visual check of the scan don't show any occultation in a confidential
time interval more than 5s.

My station was on the southern 1-sigma line (12% probability).