+--------------------------------+ +--------------------------------+ ASTERIODAL OCCULTATION - REPORT FORM +--------------------------------+ +--------------------------------+ EAON & IOTA-ES EUROPEAN ASTEROIDAL OCCULTATION NETWORK INTERNATIONAL OCCULTATION TIMING ASSOCIATION EUROPEAN SECTION +--------------------------------+ +--------------------------------+ 1.DATE: 2013/09/05 STAR: 2UCAC 30077549 ASTEROID: (41) Daphne 2.OBSERVER: Name: Gerhard Dangl Phone: ++43-(0)2842-53908 Address: AUSTRIA, A-3830, Nonndorf 12 E-mail: gerhard@dangl.at 3.OBSERVING STATION: Nearest city: Waidhofen an der Thaya Latitude: N 48 47 13.6 (WGS84) Longitude: E 15 14 07.7 (WGS84) Altitude: 595m (WGS84) Single/Multiple: Single +--------------------------------------------------------------------+ 4.TIMING OF EVENTS: Occultation recorded: POSITIVE Type of event: "S"tart observation; "I"nterrupt-"s"tart; "D"isappearance; "B"link; "F"lash; "E"nd observation; "I"nterrupt-"e"nd; "R"eappearance; "O"ther (specify) Personal Equation Substracted: No Event Time (UT) P.E. Accuracy + Comments code: HH:MM:SS.ss S.ss S.ss S: 22:25:23 D: 22:26:19.101 (+/- 0.33s) R: 22:26:42.781 (+/- 0.33s) Duration 23.680 (+/- 0.66s) Mid time 22:26:30.941 (+/- 0.66s) E: 22:27:52 5.TELESCOPE: Type: Newton Focal length: 1200mm Aperture: 254 mm Magnification: video/primary focus/FOV 18.3'x13.7' (768x576, 1.43"x1.43" per pixel) Mount: Equatorial Motor drive: Yes 6.TIMING & RECORDING: Timekeeping: GPS 1PPS, GlobalSat EM-406A GPS board + IOTA-VTI (Demo3) V1.1.43 Sensor/Camera: WAT-120N, CCIR, 1/2" Sony CCD-Sensor ICX419ALL Mode of recording: Frame16, It=640ms (1.5625 Img/s), gain=+38dB, Gamma=1.0, Y800, uncompressed AVI Device of recording: TIS DFG/USB2-lt videograbber USB2.0 (Y800), notebook harddisk Time insertion: IOTA-VTI 7.OBSERVING CONDITIONS: Atmospheric transparency: good Wind: no Star image stability: fair Minor planet visible: yes Temperature: 285 Kelvin (+12 deg Celsius) 8.ADDITIONAL COMMENTS: Target star 2UCAC 30077549, +13.0mag, 20deg Elevation. Only Clear glass filter (Astronomik) for CCD protection was used. Video recording with VirtualDub 1.10.0 running on HP notebook with W7P/64Bit system. The recorded video file was corrected with VirtualDub to the right field combining sequence before analyzing with Tangra. Video evaluation accomplished with VirtualDub 1.10.0 and Tangra v1.4.0.497. Because of the use of a WAT-120N in integration mode Frame16 (It=640ms), a correction of -350ms was performed at the times inserted in the video by the VTI. The correction value is according to measurements results with EXposure Time Analyzer - EXTA presented on web page http://www.dangl.at/exta/exta_e.htm. So all event times in this report are corrected times representing the real event times. Event data details according to the predictions from Steve Preston (IOTA). Predicted event time was 22:26:29 UTC (+/- 6s) for my observing position. Predicted maximum duration was 20.9 seconds with a 0.2mag drop. Position was -6km from predicted central line in ESE direction between central line and path edge with a probability of 93.6%. Occultation event with a duration of 23.68s detected (It=640ms). 3-D Position and timing GlobalSat EM-406A GPS Board Receiving 07 satellites Horizontal Dilution of Precision 2.2 Geoidal separation 44.6m (Altitude 550.0MSL + 44.6 = 594.6 m in WGS84 datum) 2013/08/14 Gerhard Dangl gerhard@dangl.at www.dangl.at/ +--------------------------------------------------------------------+