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

                ASTERIODAL OCCULTATION - REPORT FORM

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

                      EAON & IOTA-ES

              EUROPEAN ASTEROIDAL OCCULTATION NETWORK

   INTERNATIONAL OCCULTATION TIMING ASSOCIATION EUROPEAN SECTION

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


1. DATE: 23 AUG 2014
   STAR: 4UC 335-172956
   ASTEROID: (240) Vanadis

2. OBSERVER
   Name: S. SPOSETTI
   Address: 6525 GNOSCA - Switzerland
   Email: stefanosposetti@ticino.com

3. OBSERVING STATION
   Nearest city: CH-6776 Piotta
   Longitude: 8d 42.0492m (E)
   Latitude: 46d 32.7640m (N)
   Altitude: 1917m
   (WGS84)

4. TIMING OF EVENTS
   Occultation recorded: POSITIVE
   Type of event:
   "S"tart observation;
   "I"nterrupt-start;
   "D"isappearance;
   "B"link;
   "F"lash;
   "E"nd observation;
   "I"nterrupt-end;
   "R"eappearance;
   "O"ther (specify)

   Personal Equation Substracted: No
   Event Time (UTC)       Accuracy + Comments
   code: HH:MM:SS.ss      S.ss
    -S : 20:27:05
    -D : 20:28:30.74  ± 0.64s
    -R : 20:28:35.86  ± 0.32s
    -E : 20:30:47
   Duration:    5.12s ± 0.96s

5. TELESCOPE
   Type: Schmidt-Cassegrain, Celestron 8-inch
   Aperture: 200mm
   Focal length: about 800mm (with 0.33x focal reducer)
   Field of view: about 26x17arcmin
   Mount: Equatorial
   Motor drive: Yes

6. TIMING & RECORDING
   Timekeeping: KIWI-OSD with GPS Garmin 18 LVC
   Sensor/Camera: Videocamera WAT-910HX, CCIR, 1/2", ICX429ALL sensor
   Videocamera settings: Shutter=x32; Gamma=1.00
   Device of recording: Personal computer, Imaging Source DFG/USB2-lt, Composite-video,
   Virtualdub software, saved on Harddisk, Huffyuv
   Mode of recording: Integration time=0.640s, CCIR
   Time insertion device: KIWI-OSD

7. OBSERVING CONDITIONS
   Atmospheric transparency: good
   Wind: fair
   Star image stability: fair
   Minor Planet Visible: yes

8. ADDITIONAL COMMENTS

Elevation of the target star: about 20deg.
Tangra 1.4 was used to analyze the lightcurve.
A correction of -0.34s was made because of the use of the integration camera Watec 910HX.
A measured lightdrop between 0.3 mag and 0.4 mag instead of the predicted 0.5 mag was found.
A lightcurve can be seen here:
http://sposetti.ch/wp-content/uploads/2014/09/2014_Aug_23_Vanadis_sposetti.png