+--------------------------------+ +--------------------------------+ ASTERIODAL OCCULTATION - REPORT FORM +--------------------------------+ +--------------------------------+ EAON & IOTA-ES EUROPEAN ASTEROIDAL OCCULTATION NETWORK INTERNATIONAL OCCULTATION TIMING ASSOCIATION EUROPEAN SECTION +--------------------------------+ +--------------------------------+ 1.DATE: 2010/02/21 STAR: 2UCAC 39125717 ASTEROID: (702) Alauda 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/Thaya Latitude: N 48 47 13.3 (WGS84) Longitude: E 15 14 08.3 (WGS84) Altitude: 592m (WGS84) Single/Multiple: Single +--------------------------------------------------------------------+ 4.TIMING OF EVENTS: Occultation recorded: NEGATIVE 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: 22:00:31 E: 22:05:17 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 Garmin 18x LVC + KIWI-OSD Sensor/Camera: WAT-120N, CCIR, 1/2" Sony CCD-Sensor ICX419ALL Mode of recording: It=320ms (3.125 Img/s), Video CCIR, Y800, uncompressed AVI Device of recording: TIS DFG/USB2-lt Videograbber USB2.0 (Y800), Notebook Harddisk Time insertion: KIWI-OSD 7.OBSERVING CONDITIONS: Atmospheric transparency: fair Wind: No Star image stability: fair Minor planet visible: No Temperature: 267 Kelvin (-6 deg Celsius) 8.ADDITIONAL COMMENTS: Target star 2UCAC 39125717, +13.4mag, 51deg Elevation. Faintest object visible on live video fields (It=320ms) was target star. Only Clear glass filter (Astronomik) for CCD protection was used. Video evaluation accomplished with VirtualDub1.9.7, AviSynth2.5 and Limovie0.9.29b. Predicted event time was 22:02:28 UTC for my observing position. Predicted maximum duration was 30.4 seconds with 0.4mag drop. Position was 489km from central line in azimut direction angle 155 degree between 2-sigma and 3-sigma line with a probability of 0.5%. No occultation detected (It=320ms). 3-D Position and timing Garmin GPS18x LVC Receiving 09 satellites Horizontal Dilution of Precision 1.0 Geoidal separation 44.5m (Altitude 547.8MSL + 44.5 = 592.3 m in WGS84 datum) Gerhard Dangl gerhard@dangl.at www.dangl.at/ +--------------------------------------------------------------------+