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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: 2011/09/26
  STAR: 2UCAC 37697988
  ASTEROID: (266) Aline

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 13.3 (WGS84)
	Longitude: E 15 14 08.3 (WGS84)
	Altitude:  587m         (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:    00:48:10

	D:    00:48:15.43 (+/- 0.16s)
        R:    00:48:19.27 (+/- 0.16s)    Duration 3.84s (+/- 0.32s)
                                         Mid time 00:48:17.35 (+/- 0.32s)

	E:    00:49:55     
	
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=320ms (3.125 Img/s), Video CCIR, Y800, uncompressed AVI
	Device of recording: TIS DFG/USB2-lt Videograbber USB2.0 (Y800), Notebook Harddisk
        Time insertion: KIWI-OSD 

7.OBSERVING CONDITIONS:
	Atmospheric transparency: fair 
	Wind: no
	Star image stability: good
	Minor planet visible: No
	Temperature: 280 Kelvin (+07 deg Celsius)
	
8.ADDITIONAL COMMENTS:
        Target star 2UCAC 37697988, +12.3mag, 24deg Elevation.

        Due to some meters of ground fog a longer integration time was used.

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

        Video evaluation accomplished with VirtualDub 1.9.7 and Tangra v1.2.0.373

        Because of the use of a WAT-120N in integration mode frame8 (It=320ms)
        a correction of -190ms was made to the video inserted times according
        to the correction value table on:
        http://www.dangl.at/ausruest/vid_tim/vid_tim1.htm#wat_120n

        Predicted event time was 00:48:21 UTC for my observing position.
        Predicted maximum duration was 5.4 seconds with a 1.5mag drop.
        Position was 140km from predicted central line in SE direction
        between 1-sigma and 2-sigma line with a probability of 10.5%.
        Occultation event with a duration of 3.84s detected (It=320ms).
        
        3-D Position and timing
	Garmin GPS18x LVC
        Receiving 09 satellites
        Horizontal Dilution of Precision 1.0
        Geoidal separation 44.5m (Altitude 542.2MSL + 44.5 = 586.7 m in WGS84 datum)

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