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                 ASTERIODAL OCCULTATION - REPORT FORM

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           	           EAON & IOTA-ES

               EUROPEAN ASTEROIDAL OCCULTATION NETWORK

    INTERNATIONAL OCCULTATION TIMING ASSOCIATION EUROPEAN SECTION

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1.DATE: 2011/04/16
  STAR: TYC 4905-00342-1
  ASTEROID: (709) Fringilla

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 13.1 (WGS84)
	Longitude: E 15 14 08.4 (WGS84)
	Altitude:  592m         (WGS84)
	Single/Multiple: Single

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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:    19:39:14

	E:    19:41:16     
	
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=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 (moving clouds)
	Wind: No
	Star image stability: fair
	Minor planet visible: No
	Temperature: 278 Kelvin (+05 deg Celsius)
	
8.ADDITIONAL COMMENTS:
        Target star TYC 4905-00342-1, +12.4mag, 40deg Elevation.
    
        Only Clear glass filter (Astronomik) for CCD protection was used.

        Due to moving clouds recording start was delayed.

        Video evaluation accomplished with VirtualDub 1.9.7

        Predicted event time was 19:38:34 UTC for my observing position.
        Predicted maximum duration was 16.6 seconds with a 2.1mag drop.
        Position was 210km from predicted central line in SW direction
        between 1-sigma line and 2-sigma line with a probability of 5.4%.
        No occultation event detected (It=320ms).
        
        3-D Position and timing
	Garmin GPS18x LVC
        Receiving 08 satellites
        Horizontal Dilution of Precision 1.1
        Geoidal separation 44.5m (Altitude 547.7MSL + 44.5 = 592.2 m in WGS84 datum)

        Gerhard Dangl
        gerhard@dangl.at
        www.dangl.at/
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