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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: 2007/04/21
  STAR: TYC 1407-00130-1
  ASTEROID: (17) Thetis

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 13.8 (WGS84)
	Longitude: E 15 14 07.2 (WGS84)
	Altitude:  597m         (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:    22:43:56

	E:    22:50:16         
	
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-902H2 Ultimate, CCIR, 1/2" Sony CCD-Sensor ICX429ALL
	Mode of recording: It=20ms (50 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: good
	Wind: No
	Star image stability: fair
	Minor planet visible: No
	Temperature: 275 Kelvin (+02 deg Celsius)
	
8.ADDITIONAL COMMENTS:
        Video evaluation accomblished with VirtualDub1.6.16 and Limovie0.9.25
        No occultation detected (It=20ms)

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

        Target star TYC 1407-00130-1, +10.2mag, 28deg Elevation
        Limit on recorded video fields (It=20ms) TYC 1407-00176, +11.7mag

        3-D Position and timing
	Garmin GPS18 LVC
        Receiving 07 satellites
        Horizontal Dilution of Precision 1.9
        Geoidal separation 44.4m (Altitude 552.1MSL + 44.4 = 596.5m in WGS84 datum)

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