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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: 2007/04/09
  STAR: TYC 2426-00200-1u
  ASTEROID: (4157) Izu

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 13.9 (WGS84)
	Longitude: E 15 14 07.2 (WGS84)
	Altitude:  591m         (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:    21:19:15

	E:    21:24:11         
	
5.TELESCOPE:
	Type: Newton
	Focal length: 1200mm
 	Aperture: 254 mm
	Magnification: video/primary focus/FOV 18.5'x13.8'/1.5" per pixel
	Mount: Equatorial
	Motor drive: Yes

6.TIMING & RECORDING:
	Timekeeping: GPS 1PPS Garmin 18 LVC + KIWI-OSD
        Sensor/Camera: WAT-120N, CCIR, 1/2" Sony CCD-Sensor ICX419ALL
	Mode of recording: It=160-320ms (6.25-3.125 Img/s), Video CCIR, AVI, YUY2, Huffyuv,
	Device of recording: Xpert V-Stream Videograbber USB2.0, Notebook Harddisk
        Time insertion: KIWI-OSD 

7.OBSERVING CONDITIONS:
	Atmospheric transparency: bad
	Wind: 1-2m/s
	Star image stability: fair
	Minor planet visible: No
	Temperature: 278 Kelvin (+05 deg Celsius)
	
8.ADDITIONAL COMMENTS:
        Due to some thin clouds moving through target area the integration time
        had to be switched between 160 and 320ms.

	Video evaluation accomblished with VirtualDub1.6.16 and Limovie0.9.25
        No occultation detected (It=160 or 320ms)

        Only Clear glass filter (Astronomik) for CCD protection was used

        Target star TYC 2426-00200-1u, +11.8mag, 33deg Elevation
        Limit on recorded video fields (It=160ms) GSC 2426 00047, +12.5mag

        3-D Position and timing
	Garmin GPS18 LVC
        Receiving 09 satellites
        Horizontal Dilution of Precision 0.9
        Geoidal separation 44.4m (Altitude 546.6MSL + 44.4 = 591.0m in WGS84 datum)

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