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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: 2006/10/14
  STAR: TYC 1222-00874-1u
  ASTEROID: (6723) Chrisclark

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 13.5 (WGS84)
	Longitude: E 15 14 08.4 (WGS84)
	Altitude: 548m (MSL)
	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:    18:45:44

	E:    18:49:01         clouds covered sky region
	
5.TELESCOPE:
	Type: Newton
	Focal length: 1200mm
 	Aperture: 254 mm
	Magnification: video/primary focus/recorded field 1112" x 830"
	Mount: Equatorial
	Motor drive: Yes

6.TIMING & RECORDING:
	Timekeeping: GPS 1PPS Garmin18 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, 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: No 
	Star image stability: fair
	Minor planet visible: No
	Temperature: 281 Kelvin (+08 deg Celsius)
	
8.ADDITIONAL COMMENTS:
        Due to much haze in the air an integration time of 320ms was necessary
        Video evaluation accomblished with VirtualDub1.6.16
        No occultation detected

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

        Target star TYC 1222-00874-1u, +11.4mag, 24deg Elevation
        Limit on video fields TYC 1222-00823, +11.5mag

        3-D Position and timing
	Garmin GPS18 LVC
        Receiving 09 satellites
        Horizontal Dilution of Precision 1.3
        Geoidal separation 44.4m

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