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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: 2013/09/05
  STAR: 2UCAC 30077549
  ASTEROID: (41) Daphne

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 an der Thaya
	Latitude:  N 48 47 13.6 (WGS84)
	Longitude: E 15 14 07.7 (WGS84)
	Altitude:  595m         (WGS84)
	Single/Multiple: Single

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4.TIMING OF EVENTS:
	Occultation recorded: POSITIVE
	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:    22:25:23

	D:    22:26:19.101 (+/- 0.33s)
        R:    22:26:42.781 (+/- 0.33s)    Duration       23.680 (+/- 0.66s)  
                                          Mid time 22:26:30.941 (+/- 0.66s)

	E:    22:27:52     
	
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, GlobalSat EM-406A GPS board + IOTA-VTI (Demo3) V1.1.43
        Sensor/Camera: WAT-120N, CCIR, 1/2" Sony CCD-Sensor ICX419ALL
	Mode of recording: Frame16, It=640ms (1.5625 Img/s), gain=+38dB, Gamma=1.0, Y800, uncompressed AVI
	Device of recording: TIS DFG/USB2-lt videograbber USB2.0 (Y800), notebook harddisk
        Time insertion: IOTA-VTI

7.OBSERVING CONDITIONS:
	Atmospheric transparency: good
	Wind: no
	Star image stability: fair
	Minor planet visible: yes
	Temperature: 285 Kelvin (+12 deg Celsius)
	
8.ADDITIONAL COMMENTS:
        Target star 2UCAC 30077549, +13.0mag, 20deg Elevation.
        Only Clear glass filter (Astronomik) for CCD protection was used.

        Video recording with VirtualDub 1.10.0 running on HP notebook with W7P/64Bit system.
        The recorded video file was corrected with VirtualDub to the right field combining
        sequence before analyzing with Tangra. Video evaluation accomplished with VirtualDub
        1.10.0 and Tangra v1.4.0.497. 

        Because of the use of a WAT-120N in integration mode Frame16 (It=640ms), a correction
        of -350ms was performed at the times inserted in the video by the VTI. The correction
        value is according to measurements results with EXposure Time Analyzer - EXTA presented
        on web page http://www.dangl.at/exta/exta_e.htm. So all event times in this report are
        corrected times representing the real event times.

        Event data details according to the predictions from Steve Preston (IOTA).
        Predicted event time was 22:26:29 UTC (+/- 6s) for my observing position.
        Predicted maximum duration was 20.9 seconds with a 0.2mag drop.
        Position was -6km from predicted central line in ESE direction
        between central line and path edge with a probability of 93.6%.
        Occultation event with a duration of 23.68s detected (It=640ms).
 
        3-D Position and timing
	GlobalSat EM-406A GPS Board
        Receiving 07 satellites
        Horizontal Dilution of Precision 2.2
        Geoidal separation 44.6m (Altitude 550.0MSL + 44.6 = 594.6 m in WGS84 datum)

        2013/08/14
        Gerhard Dangl
        gerhard@dangl.at
        www.dangl.at/
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