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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: 2012/05/21
  STAR: 2UCAC 38981973
  ASTEROID: (148) Gallia

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 13.4 (WGS84)
	Longitude: E 15 14 08.3 (WGS84)
	Altitude:  591m         (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:    23:01:42

	E:    23:04:11     
	
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: It=0.32s (3.125 Img/s), 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: fair
	Wind: 3 - 8m/s
	Star image stability: fair
	Minor planet visible: Yes, separated until few minutes before event time
	Temperature: 287 Kelvin (+14 deg Celsius)
	
8.ADDITIONAL COMMENTS:
        Target star 2UCAC 38981973, +12.9mag, 57deg Elevation.

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

        Video evaluation accomplished with VirtualDub 1.10.0, Tangra v1.4.0.435

        Event data details according to the predictions from Steve Preston.
        Predicted event time was 23:03:05 UTC (+/- 11s) for my observing position.
        Predicted maximum duration was 6.8 seconds with a 0.8mag drop.
        Position was 309km from predicted central line in N direction
        between 1-sigma and 2-sigma limit with a probability of 2.5%.
        No occultation event detected (It=0.32s).
        
        3-D Position and timing
	Garmin GPS18x LVC
        Receiving 08 satellites
        Horizontal Dilution of Precision 1.3
        Geoidal separation 44.6m (Altitude 546.4MSL + 44.6 = 591.0 m in WGS84 datum)

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