+--------------------------------+ +--------------------------------+ ASTERIODAL OCCULTATION - REPORT FORM +--------------------------------+ +--------------------------------+ EAON & IOTA-ES EUROPEAN ASTEROIDAL OCCULTATION NETWORK INTERNATIONAL OCCULTATION TIMING ASSOCIATION EUROPEAN SECTION +--------------------------------+ +--------------------------------+ 1. DATE: 19 Apr 2018 STAR: 4U 539-48000 ASTEROID: (3889) Menshikov 2. OBSERVER Name: Stefano SPOSETTI Address: 6525 GNOSCA - Switzerland Email: stefanosposetti@ticino.com 3. OBSERVING STATION Nearest city: CH-6525 Gnosca Station: 143 Longitude (DD MM SS.s): 09 01 26.5 (E) Latitude (DD MM SS.s): 46 13 53.2 (N) Altitude: 260m (WGS84) 4. TIMING OF EVENTS Occultation recorded: NEGATIVE Type of event: "S"tart observation; "E"nd observation; Personal Equation Substracted: - Event Time (UTC) Accuracy + Comments code: HH:MM:SS.ss S.sss -S : 21:31:04 -E : 21:40:20 5. TELESCOPE -Type: Schmidt-Cassegrain, Celestron 11-inch -Aperture: 280 mm -Focal length: 930 mm (with focal reducer) -Magnification: FOV 23x18 arcmin -Mount: Equatorial -Motor drive: Yes 6. TIMING & RECORDING -Camera/Sensor: Videocamera WAT-910HX-RC, CCIR, 1/2", ICX429ALL sensor -Videocamera settings: Shutter = x32, Gain = 38/41, Gamma = 1.00 -Device of recording: Personal computer -Grabber: Imaging Source DFG/SV1 PCI, composite input -Software: Virtualdub v. 1.10.4, saved on Harddisk as Huffyuv compressed file -Time insertion device: IOTA-VTI, v.1.1.42 -Timekeeping: GPS 1PPS (US Global Sat EM-406A) -Integration time: 0.640 s 7. OBSERVING CONDITIONS -Atmospheric transparency: good -Wind: - -Star image stability: good -Minor Planet Visible: - 8. ADDITIONAL COMMENTS -