+--------------------------------+ +--------------------------------+ ASTERIODAL OCCULTATION - REPORT FORM +--------------------------------+ +--------------------------------+ EAON & IOTA-ES EUROPEAN ASTEROIDAL OCCULTATION NETWORK INTERNATIONAL OCCULTATION TIMING ASSOCIATION EUROPEAN SECTION +--------------------------------+ +--------------------------------+ 1. DATE: 07 Mar 2014 STAR: HIP 78193 ASTEROID: (9) Metis 2. OBSERVER Name: S. SPOSETTI - B. BERNARDI (station 1) Address: 6525 GNOSCA - Switzerland Email: stefanosposetti@ticino.com 3. OBSERVING STATION 1 Nearest city: CH-Biasca Longitude: 08d 57m 32.4s E Latitude: 46d 21m 27.7s N Altitude: 300m (Google Earth) 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: - Event Time (UTC) Accuracy + Comments code: HH:MM:SS.ss S.ss -S : 03:07:57 -D : 03:08:47.74 ± 0.02 -R : 03:09:03.45 ± 0.02 -E : 03:10:19 Duration: 15.71 s ± 0.04 s 5. TELESCOPE Type: Baker-Schmidt Aperture: 200mm Focal length: 500mm Magnification: FOV about 30x24arcmin Mount: Equatorial Motor drive: No 6. TIMING & RECORDING Timekeeping: KIWI-OSD with GPS Garmin 18 LVC Sensor/Camera: Videocamera KT&C, KPC-SLL650BHE, EIA, 1/3" CCD-Sensor Videocamera settings: Auto Light Control, Gamma=0.45 Device of recording: CANON ZR10 Camcorder, Mini DV, S-video input, saved on Mini DV magnetic cassette Mode of recording: Integration time=0.03337s (29.97 Img/s), NTSC Time insertion: KIWI-OSD 7. OBSERVING CONDITIONS Atmospheric transparency: good Wind: no Star image stability: fair Minor Planet Visible: no 8. ADDITIONAL COMMENTS Automatic observation. A first time insertion was incrusted in the frames about 30 minutes before and a second time insertion was incrusted about 20 minutes after the event time. Only one faint comparison-star was in the field of view. The movie from the magnetic cassette was later saved on HD and captured with Virtualdub. The movie shows that the optic image of the target star was deformed because of optics misalignement. In several frames the signal of the star is saturated. Limovie was used to plot the lightcurve. The disappearance and the reappearance were abrupt. The measurement of the D and R times was made manually. An image of the lightcurve is posted here: http://www.sposetti.ch/images/stories/Minor_planets/2014_MAR_7_Metis_Bellinzona_Gnosca_Biasca_Semione.png