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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: 2010 Feb 14
   STAR: TYC 1855-00853-1
   ASTEROID: (128) Nemesis

2. OBSERVER
   Name: Stefano SPOSETTI
   Address: In Fun I Vign 7 - 6525 GNOSCA - Switzerland
   Email: stefanosposetti@ticino.com

3. OBSERVING STATION
   Nearest city: CH-6500 Bellinzona
   Longitude: 46deg 13min 54sec (N)
   Latitude: 9deg 1min 30sec (E)
   Altitude: 260m

4. TIMING OF EVENTS
   Occultation recorded: NEGATIVE
   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 : 21:57:15
    -E : 22:14:05

5. TELESCOPE
   Type: Newtonian reflector
   Aperture: 400mm
   Focal length: 1600mm
   Magnification: videocamera in primary focus, FOV 13x10arcmin
   Mount: Equatorial
   Motor drive: Yes

6. TIMING & RECORDING
   Timekeeping: KIWI-OSD with GPS Garmin 18 LVC
   Sensor/Camera: Videocamera WAT-120N+, CCIR, 1/2" Sony CCD-Sensor ICX419ALL
   Videocamera settings: Shutter mode=1, Gain=HI , Gamma=HI
   Device of recording: Personal computer, TV-AV PCI-TV7130, S-video input,
   Virtualdub software, AVI file saved on Harddisk
   Mode of recording: Integration time=0.04s (25 Img/s), CCIR, Huffyuv
   Time insertion: KIWI-OSD

7. OBSERVING CONDITIONS
   Atmospheric transparency: good
   Wind: none
   Star image stability: good
   Temperature: 0°C
   Minor Planet Visible: no

8. ADDITIONAL COMMENTS
   Limovie software was used to analyze the AVI files.
   Signal average=2000, Standard deviation=180

   My location was outside (south) the predicted ground path, but inside the
1-sigma error.