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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: 2013/08/10
  STAR: 4UC 355-195889
  ASTEROID: (268) Adorea

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 13.1 (WGS84)
	Longitude: E 15 14 08.4 (WGS84)
	Altitude:  594m         (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:    21:18:35

	D:    21:20:07.556 (+/- 0.17s)
        R:    21:20:14.596 (+/- 0.17s)    Duration        7.040 (+/- 0.34s)  
                                          Mid time 21:20:11.076 (+/- 0.34s)

	E:    21:21:27     
	
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: Frame8, It=320ms (3.125 Img/s), gain=+38dB, Video CCIR, 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: good
	Minor planet visible: yes, separated until few minutes before event
	Temperature: 286 Kelvin (+13 deg Celsius)
	
8.ADDITIONAL COMMENTS:
        Target star 4UC 355-195889, +13.2mag, 21deg Elevation.
        Only Clear glass filter (Astronomik) for CCD protection was used.

        Video recording with VirtualDub 1.10.0 running on HP notebook with W7/64Bit 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 Frame8 (It=320ms), a correction
        of -190ms 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 Occult Watcher IBEROC feed.
        Predicted event time was 21:20:07 UTC (+/- 8s) for my observing position.
        Predicted maximum duration was 10.7 seconds with a 0.7mag drop.
        Position was -269km from predicted central line in SE direction
        between path edge and 1-sigma limit with a probability of 35.1%.
        Occultation event with a duration of 7.04s detected (It=320ms).
 
        3-D Position and timing
	GlobalSat EM-406A GPS Board
        Receiving 08 satellites
        Horizontal Dilution of Precision 1.1
        Geoidal separation 44.6m (Altitude 549.1MSL + 44.6 = 593.7 m in WGS84 datum)

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