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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: 2008/02/25
  STAR: TYC 2471-01879-1u
  ASTEROID: (7174) 1988 SQ

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 13.5 (WGS84)
	Longitude: E 15 14 08.4 (WGS84)
	Altitude:  589m         (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:    19:51:50

	E:    19:57:19         
	
5.TELESCOPE:
	Type: Newton
	Focal length: 1200mm
 	Aperture: 254 mm
	Magnification: video/primary focus/FOV 1134" x 822" (720x576 = 1.48"x1.43" per pixel)
	Mount: Equatorial
	Motor drive: Yes

6.TIMING & RECORDING:
	Timekeeping: GPS 1PPS Garmin 18 LVC + KIWI-OSD
        Sensor/Camera: WAT-120N, CCIR, 1/2" Sony CCD-Sensor ICX419ALL, 8.6x8.3um, 768x576
	Mode of recording: It=80ms (12.5 Img/s), Video CCIR, AVI, YUY2, Huffyuv,
	Device of recording: The Imaging Source Video-to-USB2.0 converter, Notebook Harddisk
        Time insertion: KIWI-OSD 

7.OBSERVING CONDITIONS:
	Atmospheric transparency: good
	Wind: no
	Star image stability: good
	Minor planet visible: No
	Temperature: 276 Kelvin (+03 deg Celsius)
	
8.ADDITIONAL COMMENTS:
        Video evaluation accomblished with VirtualDub1.7.8 and Limovie0.9.28c
        No occultation detected (It=80ms)
 
        Only Clear glass filter (Astronomik) for CCD protection was used

        Target star TYC 2471-01879-1u, +11.9mag, 72deg Elevation
        Limit on live video fields was TYC 2471-01714, +13.0mag

        3-D Position and timing
	Garmin GPS18 LVC
        Receiving 11 satellites
        Horizontal Dilution of Precision 0.9
        Geoidal separation 44.4m (Altitude 544.4MSL + 44.4 = 588.8m in WGS84 datum)

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