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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: 2008/12/28
  STAR: 2UCAC 37537210
  ASTEROID: () 2002 CY248, 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:  607m         (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:    01:10:10

        I-s:  01:11:58
        I-e:  01:12:09

        I-s:  01:18:25
        I-e:  01:19:21

        I-s:  01:20:41
        I-e:  01:21:57

        I-s:  01:22:44
        I-e:  01:23:33

        I-s:  01:25:09
        I-e:  01:25:20

        I-s:  01:25:35

        E:    01:45:05
	
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 Garmin 18 LVC + KIWI-OSD
        Sensor/Camera: WAT-120N, CCIR, 1/2" Sony CCD-Sensor ICX419ALL
	Mode of recording: It=2.56s (0.390625 Img/s), Video CCIR, AVI, YUY2, Huffyuv,
	Device of recording: TIS DFG/USB2-lt Videograbber USB2.0, Notebook Harddisk
        Time insertion: KIWI-OSD 

7.OBSERVING CONDITIONS:
	Atmospheric transparency: bad
	Wind: 0.5 - 1m/s
	Star image stability: fair
	Minor planet visible: No
	Temperature: 267 Kelvin (-06 deg Celsius)
	
8.ADDITIONAL COMMENTS:
        The predicted event time was 01:07:32 UT. Max. duration=16.6s.
        The 1 sigma uncertainty interval in time was +/- 27.3 minutes.
        
        Because of clouds the planned recording start at 00:30
        was delayed by about 40 minutes to 01:10 UT.

        Target star 2UCAC 37537210, +14.1mag, 57deg Elevation.
        Faintest object visible on some live video fields (It=2.56s)
        was 2UCAC 37537230 +14.9mag.

        Due to clouds the limit magnitude was permanently decreased and
        the visibility of the stars was interrupted several times.

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

        Video evaluation accomplished with VirtualDub1.8.5 manually.
        No occultation detected (It=2.56s)

        3-D Position and timing
	Garmin GPS18 LVC
        Receiving 07 satellites
        Horizontal Dilution of Precision 1.6
        Geoidal separation 44.4m (Altitude 562.8MSL + 44.4 = 607.2m in WGS84 datum)

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