+--------------------------------+ +--------------------------------+ ASTERIODAL OCCULTATION - REPORT FORM +--------------------------------+ +--------------------------------+ EAON & IOTA-ES EUROPEAN ASTEROIDAL OCCULTATION NETWORK INTERNATIONAL OCCULTATION TIMING ASSOCIATION EUROPEAN SECTION +--------------------------------+ +--------------------------------+ 1. DATE: 18 Oct 2016 STAR: 4U 582-5597 ASTEROID: (43857) 1993 VP2 2. OBSERVER Name: Stefano SPOSETTI Address: 6525 GNOSCA - Switzerland Email: stefanosposetti@ticino.com 3. OBSERVING STATION Nearest city: CH-6525 Gnosca 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.sss -S : 22:05:38 -D : 22:10:37.06 ± 0.08 s -R : 22:10:37.22 ± 0.08 s -E : 22:15:58 Duration: 0.16 s ± 0.16 s TELESCOPE -Type: Schmidt-Cassegrain, Celestron 11-inch -Aperture: 280 mm -Focal length: 930 mm (with focal reducer) -FOV: about 23x18 arcmin -Mount: Equatorial -Motor drive: Yes 6. TIMING & RECORDING -Sensor/Camera: Videocamera WAT-910HX/RC, CCIR, 1/2", ICX429ALL sensor -Videocamera settings: Shutter = x8; Manual Gain = 41/41; Gamma = 1.00 All other settings = OFF -Device of recording: Personal computer, Imaging Source DFG/SV1 PCI, Svideo input, uncompressed recording, Virtualdub software -Time Insertion Device: IOTA-VTI, v.1.1.42 -Timekeeping: GPS 1PPS -Integration time: 0.160 s 7. OBSERVING CONDITIONS Atmospheric transparency: good/fair Wind: no Star image stability: good Minor Planet Visible: no 8. ADDITIONAL COMMENTS -Target position at azimut = 121 deg and elevation = 60 deg -Moonlight, some clouds -Sky somewhat transparent at the target position Accordingly to Occultwatcher prediction (IBEROC feed): -Rank: 13 -Probability: 6.6 % -Lightdrop: 3.4 mag -Max duration: 1.1 s -Tangra v. 3.6 was used to generate the lightcurve (aperture photometry, average background). -The duration of the event lasted one integration time. -A lightcurve can be seen here: http://sposetti.ch/wp-content/uploads/2014/09/2016_October_18_1993VP2.png