+--------------------------------+ +--------------------------------+ ASTERIODAL OCCULTATION - REPORT FORM +--------------------------------+ +--------------------------------+ EAON & IOTA-ES EUROPEAN ASTEROIDAL OCCULTATION NETWORK INTERNATIONAL OCCULTATION TIMING ASSOCIATION EUROPEAN SECTION +--------------------------------+ +--------------------------------+ 1.DATE: 2010/02/22 STAR: TYC 1420-00174-1u ASTEROID: (13311) 1998 RA68 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 13.4 (WGS84) Longitude: E 15 14 08.2 (WGS84) Altitude: 589m (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: 00:15:52 E: 00:20:16 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=20ms (50 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: hazy Wind: No Star image stability: fair Minor planet visible: No Temperature: 265 Kelvin (-8 deg Celsius) 8.ADDITIONAL COMMENTS: Target star TYC 1420-00174-1u, +9.5mag, 56deg Elevation. Faintest object visible on live video fields (It=20ms) 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 00:17:53 UTC for my observing position. Predicted maximum duration was 0.6 seconds with 7.7mag drop. Position was 703km from central line in azimut direction angle 199 degree between 1-sigma and 2-sigma line with a probability of 0.3%. No occultation detected (It=20ms). 3-D Position and timing Garmin GPS18x LVC Receiving 10 satellites Horizontal Dilution of Precision 0.9 Geoidal separation 44.5m (Altitude 544.1MSL + 44.5 = 588.6 m in WGS84 datum) Gerhard Dangl gerhard@dangl.at www.dangl.at/ +--------------------------------------------------------------------+