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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: 26 JAN 2013
   STAR: TYC 0835-01282-1
   ASTEROID: (100) Hekate

2. OBSERVER
   Name: Stefano SPOSETTI
   Address: CH-6525 GNOSCA
   Email: stefanosposetti@ticino.com

3. OBSERVING STATION
   Nearest city: CH-6500 Bellinzona
   Longitude: 9d 1m 26.5s (E)
   Latitude: 46d 13m 53.2s (N)
   Altitude: 260m
   (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 : 20:44:50
    -D : 20:45:52.9      ± 0.4
    -R : 20:45:57.7      ± 0.2
    -E : 20:47:00
 Duration: 4.8s ± 0.5s

5. TELESCOPE:
   Type: Newtonian
   Aperture: 400mm
   Focal length: 930mm (with focal reducer)
   Magnification: FOV 23x18arcmin
   Mount: equatorial
   Motor drive: yes

6. TIMING & RECORDING
   Timekeeping: GPS 1PPS (US Global Sat EM-406A)
   Sensor/Camera: Videocamera WAT-120N+, CCIR, 1/2" Sony CCD-Sensor ICX419ALL
   Videocamera settings: Shutter mode SLOW=4, Gain=45% of the max settable intensity, Gamma=LO
   Device of recording: Personal computer, Hauppage HVR-1700(PCI), S-video input
   Virtualdub software, saved on Harddisk
   Mode of recording: Integration time=0.320s, CCIR, Huffyuv
   Time insertion device: IOTA-VTI, v.1.1.42

7. OBSERVING CONDITIONS
   Atmospheric transparency: bad with high clouds and Moonlight
   Wind: no
   Star image stability: fair
   Minor Planet Visible: no

8. ADDITIONAL COMMENTS
   Sky transparency was very bad. Several clouds were covering the sky and the target zone. The full moon, at a distance of 23°, was also brightening the background.
Tangra software was used to plot the lightcurve.
A gamma (reversed) factor of 0.45 was applied to the lightcurve.
A correction factor of -0.190s because of the use of a WAT120N+ integrating camera was also applied.
The D evaluation time was quite doubtful because of bad visibility.
The R time is more reliable.
A lightcurve is visible here:
http://sposetti.ch/images/stories/Minor_planets/2013_Jan_26_Hekate.png