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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: 2009/04/27
  STAR: 2UCAC 43604954
  ASTEROID: (776) Berbericia

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 13.2 (WGS84)
	Longitude: E 15 14 07.2 (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:    19:24:32

        D:    19:27:56.441    +/-640ms
        R:    19:28:01.541    +/-640ms    Duration 5.10s +/-1.28s
                                          Mid time 19:27:58.991

	E:    19:31:06       
	
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 Garmin 18x LVC + KIWI-OSD
        Sensor/Camera: WAT-120N, CCIR, 1/2" Sony CCD-Sensor ICX419ALL
	Mode of recording: It=1.28s (0.78125 Img/s), Video CCIR, AVI, YUY2, Huffyuv,
	Device of recording: TIS DFG/USB2-lt Videograbber USB2.0, Notebook Harddisk
        Time insertion: KIWI-OSD 

7.OBSERVING CONDITIONS:
	Atmospheric transparency: very bad (clouds)
	Wind: 3 - 10 m/s
	Star image stability: bad
	Minor planet visible: Yes (before and after event)
	Temperature: 287 Kelvin (+14 deg Celsius)
	
8.ADDITIONAL COMMENTS:
        Target star 2UCAC 43604954, +12.7mag, 44deg Elevation.

        Due to clouds a very long integration time of 1.28s had to be used.
        On clear sky an It of about 160ms would have been enough.
        The second obstacle was a very strong wind with gusts up to 10m/s.
        Because of the long integration time this wind was a very bad situation.

        Faintest object visible on live video fields (It=1.28s)
        was target star.

        Only Clear glass filter (Astronomik) for CCD protection was used.
        
        Video evaluation accomplished with VirtualDub1.8.6 and Limovie0.9.29b
        Occultation detected (It=1.28s) with a duration of 5.12s.
        Inserted video times corrected with values from WAT-120N table at:
        http://www.dangl.at/ausruest/vid_tim/vid_tim1.htm
        
        3-D Position and timing
	Garmin GPS18 LVC
        Receiving 09 satellites
        Horizontal Dilution of Precision 0.9
        Geoidal separation 44.5m (Altitude 550.6MSL + 44.5 = 595.1 m in WGS84 datum)

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