+--------------------------------+ +--------------------------------+ ASTERIODAL OCCULTATION - REPORT FORM +--------------------------------+ +--------------------------------+ EAON & IOTA-ES EUROPEAN ASTEROIDAL OCCULTATION NETWORK INTERNATIONAL OCCULTATION TIMING ASSOCIATION EUROPEAN SECTION +--------------------------------+ +--------------------------------+ 1.DATE: 2010/10/26 STAR: 3UC225-048301 ASTEROID: (23135) 2000 AN146 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 13.5 (WGS84) Longitude: E 15 14 08.3 (WGS84) Altitude: 597m (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: 22:53:34 E: 23:02:06 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: bad (thin clouds moving) Wind: No Star image stability: fair Minor planet visible: No Temperature: 271 Kelvin (-03 deg Celsius) 8.ADDITIONAL COMMENTS: Target star 3UC225-048301, +12.4mag, 38deg Elevation. Due to thin moving clouds which caused a bad tranparency a relative long integration time had to be used. Only Clear glass filter (Astronomik) for CCD protection was used. Video evaluation accomplished with VirtualDub 1.9.7 and Tangra v1.0.2.339 Predicted event time was 22:56:45 UTC for my observing position. Predicted maximum duration was 5.6 seconds with a 4.9mag drop. Position was 13km from predicted central line in SE direction on the shadow path with a probability of 2.1%. No occultation event 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 552.7MSL + 44.5 = 597.2 m in WGS84 datum) Gerhard Dangl gerhard@dangl.at www.dangl.at/ +--------------------------------------------------------------------+