+--------------------------------+ +--------------------------------+

                 ASTERIODAL OCCULTATION - REPORT FORM

+--------------------------------+ +--------------------------------+

           	           EAON & IOTA-ES

               EUROPEAN ASTEROIDAL OCCULTATION NETWORK

    INTERNATIONAL OCCULTATION TIMING ASSOCIATION EUROPEAN SECTION

+--------------------------------+ +--------------------------------+

1.DATE: 2011/07/07
  STAR: 3UC165-289781
  ASTEROID: (7916) 1981 EN

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 13.4 (WGS84)
	Longitude: E 15 14 08.3 (WGS84)
	Altitude:  605m         (WGS84)
	Single/Multiple: Single

+--------------------------------------------------------------------+

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:    21:29:01

	E:    21:31:02     
	
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 (P4) V1.1.40
        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: IOTA-VTI

7.OBSERVING CONDITIONS:
	Atmospheric transparency: fair
	Wind: No
	Star image stability: fair
	Minor planet visible: No
	Temperature: 289 Kelvin (+16 deg Celsius)
	
8.ADDITIONAL COMMENTS:
        Target star 3UC165-289781, +12.6mag, 21deg Elevation.

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

        Video evaluation accomplished with VirtualDub 1.9.7 and Tangra v1.3.0.409.

        Predicted event time was 21:29:46 UTC for my observing position.
        Predicted maximum duration was 1.1 seconds with a 5.4mag drop.
        Position was 23km from predicted central line in NW direction
        between path edge and 1-sigma line with a probability of 3.5%.
        No occultation detected (It=320ms).
        
        3-D Position and timing
	GlobalSat EM-406A GPS Board inside of the IOTA-VTI
        Receiving 08 satellites
        Horizontal Dilution of Precision 1.3
        Geoidal separation 44.6m (Altitude 552.9MSL + 44.6 = 597.5 m in WGS84 datum)

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