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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: 2007/10/05
  STAR: TYC 0751-00893-1
  ASTEROID: (903) Nealley

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 08.3 (WGS84)
	Altitude:  594m         (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:    01:04:59

        I-s:  01:07:16.836     moving clouds
        I-e:  01:07:38.916

        I-s:  01:08:03.876     moving clouds
        I-e:  01:08:19.876

        E:    01:08:55    
	
5.TELESCOPE:
	Type: Newton
	Focal length: 1200mm
 	Aperture: 254 mm
	Magnification: video/primary focus/FOV 15.8'x13.7'/1.48"x1.43" 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=160ms - 1.28s, 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: bad
	Minor planet visible: No
	Temperature: 284 Kelvin (+11 deg Celsius)
	
8.ADDITIONAL COMMENTS:
        Video evaluation accomblished with VirtualDub1.6.16
        In the span of time with the highest probability of an occultation
        moving clouds covered sky area total.
        Due to moving clouds dynamical change of integration time from It=160ms to 1.28s.
        No occultation detected.

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

        Target star TYC 0751-00893-1, +12.0mag, 31deg Elevation
        
        3-D Position and timing
	Garmin GPS18 LVC
        Receiving 08 satellites
        Horizontal Dilution of Precision 1.0
        Geoidal separation 44.4m (Altitude 550.0MSL + 44.4 = 594.4m in WGS84 datum)

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