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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: 2007/10/19
  STAR: GSC 1198 1241
  ASTEROID: (8405) Asbolus, TNO

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 08.1 (WGS84)
	Altitude:  592m         (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:    19:45:14

        I-s:  19:45:54.803     moving clouds
        I-e:  19:46:06.323     Int. duration 11.520 sec.

        I-s:  19:47:57.685     moving clouds
        I-e:  19:48:02.805     Int. duration 05.120 sec.

        I-s:  19:48:07.925     moving clouds
        I-e:  19:48:33.525     Int. duration 25.600 sec.

        I-s:  19:48:48.885     moving clouds
        I-e:  19:48:59.126     Int. duration 10.241 sec.

        I-s:  19:49:10.646     moving clouds
        I-e:  19:49:29.846     Int. duration 19.200 sec.

        I-s:  19:49:34.966     moving clouds
        I-e:  19:49:40.086     Int. duration 05.120 sec.

        I-s:  19:52:16.248     moving clouds
        I-e:  19:52:17.528     Int. duration 01.280 sec.

        I-s:  19:53:42.009     moving clouds
        I-e:  19:53:49.689     Int. duration 07.680 sec.

        I-s:  19:54:33.210     moving clouds
        I-e:  19:54:38.290     Int. duration 05.080 sec.

        E:    19:55:18    
	
5.TELESCOPE:
	Type: Newton
	Focal length: 1200mm
 	Aperture: 254 mm
	Magnification: video/primary focus/FOV 15.8'x13.7'/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
	Mode of recording: It=1.28s - 5.12s, Video CCIR, AVI, YUY2, Huffyuv,
	Device of recording: Xpert V-Stream Videograbber USB2.0, Notebook Harddisk
        Time insertion: KIWI-OSD 

7.OBSERVING CONDITIONS:
	Atmospheric transparency: bad
	Wind: 1 -2 m/s
	Star image stability: fair
	Minor planet visible: No
	Temperature: 274 Kelvin (+01 deg Celsius)
	
8.ADDITIONAL COMMENTS:
        Video evaluation accomblished with VirtualDub1.6.16
        In the 604 seconds of recording time a total of 9 interruptions with a cumulative
        duration of 90.841 seconds (15%) occured due to moving clouds.
        Due to the moving clouds a dynamical change of integration time in the range
        from It=1.28s to 5.12s was necessary.
        In the 513.159 seconds with star visible no occultation was detected.

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

        Target star GSC 1198 1241, +14.4mag, 43deg Elevation
        
        3-D Position and timing
	Garmin GPS18 LVC
        Receiving 07 satellites
        Horizontal Dilution of Precision 1.2
        Geoidal separation 44.4m (Altitude 548.0MSL + 44.4 = 592.4m in WGS84 datum)

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