+--------------------------------+ +--------------------------------+ ASTERIODAL OCCULTATION - REPORT FORM +--------------------------------+ +--------------------------------+ EAON & IOTA-ES EUROPEAN ASTEROIDAL OCCULTATION NETWORK INTERNATIONAL OCCULTATION TIMING ASSOCIATION EUROPEAN SECTION +--------------------------------+ +--------------------------------+ 1.DATE: 2012/01/31 STAR: TYC 2977-01512-1 ASTEROID: (1013) Tombecka 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 08.1 (WGS84) Altitude: 602m (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: 01:49:30 E: 01:51:35 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: It=80ms (12.5 Img/s), Video CCIR, 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: 2-7m/s Star image stability: fair Minor planet visible: No Temperature: 262 Kelvin (-11 deg Celsius) 8.ADDITIONAL COMMENTS: Target star TYC 2977-01512-1, +11.9mag, 56deg Elevation. Only Clear glass filter (Astronomik) for CCD protection was used. Video evaluation accomplished with VirtualDub 1.10.0, Tangra v1.3.1.434 Event data details according to the predictions from Steve Preston. Predicted event time was 01:50:42 UTC for my observing position. Predicted maximum duration was 4.9 seconds with a 1.3mag drop. Position was 48km from predicted central line in NNE direction between 1-sigma and 2-sigma limit with a probability of 11.5%. No occultation event detected (It=80ms). 3-D Position and timing Garmin GPS18x LVC Receiving 06 satellites Horizontal Dilution of Precision 2.5 Geoidal separation 44.6m (Altitude 557.2MSL + 44.6 = 601.8 m in WGS84 datum) Gerhard Dangl gerhard@dangl.at www.dangl.at/ +--------------------------------------------------------------------+