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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: 2006/05/12
  STAR: TYC 1417-00533-1u
  ASTEROID: (16956) 1998 MQ11

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 13.8 (WGS84)
	Longitude: E 15 14 07.2 (WGS84)
	Altitude: 544m (MSL)
	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:   21:08:44   

	E:   21:13:05   
	
5.TELESCOPE:
	Type: Newton
	Focal length: 1200mm
 	Aperture: 254 mm
	Magnification: video/primary focus/recorded field 842" x 630"
	Mount: Equatorial
	Motor drive: Yes

6.TIMING & RECORDING:
	Timekeeping: GPS 1PPS Garmin18 LVC + KIWI-OSD
        Sensor/Camera: 1/3" Sony EXview CCD-Sensor ICX255AL/Videomodul SK-1004XC/SO
	Mode of recording: PAL-Video, AVI, YUY2, Huffyuv, 50 fields per second
	Device of recording: USB2 Videograbber, Notebook Harddisk
        Time insertion: KIWI-OSD (50 fields per second)  

7.OBSERVING CONDITIONS:
	Atmospheric transparency: fair
	Wind: 1 m/s 
	Star image stability: due to strong high winds sometimes bad
	Minor planet visible: No
	Temperature: 285 Kelvin (+12 deg Celsius)
	
8.ADDITIONAL COMMENTS:
        Target star +10.2mag/38deg Elevation

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

        Limit on Video "live"-frames (no frame integration)
        TYC 1417-00595 +11.1 mag on about 80% visible
        TYC 1417-00431 +11.8 mag on about 30% of frames visible

        Video evaluation was done in field steps
        Target star always was visible clear or blurred
        No occultation lasting all of one field 
        
        3-D Position and timing
	Garmin GPS18 LVC
        Receiving 09 satellites
        Horizontal Dilution of Precision 0.9
        Geoidal separation 44.4m

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