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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: 2009/07/08
  STAR: TYC 0371-00513-1
  ASTEROID: (12444) Prothoon

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:  595m         (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:    21:21:59

        I-s:  21:22:02.308
        I-e:  21:22:12.788

        I-s:  21:22:16.228
        I-e:  21:22:31.628
 
        I-s:  21:23:52.509
        I-e:  21:24:02.910

        I-s:  21:24:07.470
        I-e:  21:24:09.310

        I-s:  21:25:47.831
        I-e:  21:26:07.672

	E:    21:26:34     
	
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=80ms to 640ms (6.25 to 1.5625 Img/s), Video CCIR, AVI, YUY2, Huffyuv,
	Device of recording: TIS DFG/USB2-lt Videograbber USB2.0, Notebook Harddisk
        Time insertion: KIWI-OSD 

7.OBSERVING CONDITIONS:
	Atmospheric transparency: very bad (interruptions by clouds)
	Wind: 2-6m/s
	Star image stability: fair
	Minor planet visible: No
	Temperature: 285 Kelvin (+12 deg Celsius)
	
8.ADDITIONAL COMMENTS:
        Target star TYC 0371-00513-1, +11.6mag, 41deg Elevation.
        Faintest object visible on live video fields (It=80ms to 640ms)
        was target star.

        Only Clear glass filter (Astronomik) for CCD protection was used.
        
        Video evaluation accomplished with VirtualDub1.8.6, AviSynth2.5 and Limovie0.9.29b

        Due to clouds in about 58 seconds of total 275 seconds the target star was invisible.
        The integration time had to be changed several times to hold the target star visible.

        No occultation detected (It=80ms to 640ms)
        
        3-D Position and timing
	Garmin GPS18x LVC
        Receiving 09 satellites
        Horizontal Dilution of Precision 0.9
        Geoidal separation 44.5m (Altitude 550.4MSL + 44.5 = 594.9 m in WGS84 datum)

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