ASTEROIDAL OCCULTATION - REPORT FORM

    +------------------------------+  +------------------------------+
    |            EAON              |  |            IOTA/ES           |
    |                              |  |   INTERNATIONAL OCCULTATION  |
    |     EUROPEAN  ASTEROIDAL     |  |      TIMING  ASSOCIATION     |
    |     OCCULTATION NETWORK      |  |       EUROPEAN SECTION       |
    +------------------------------+  +------------------------------+

1 DATE (YYYY/MM/DD): 2017/06/01   
	STAR:        4U 410-71870
	ASTEROID:    1998 WZ5
	N°:          12921

2 OBSERVER: 
	Name:    Peter DELINCAK       
	E-mail:  pdlink@astronomy.sk
	Address: SLOVAKIA, Hviezdoslavova 1971, 022 01  Cadca
	Phone:   +421 915 710 121
	Web:     www.astronomy.sk

3 OBSERVING STATION: 
	Nearest city:            Cadca
	Station:                 PDlink Observatory
	Longitude (DD MM SS.s):  E 18 42 09.47 (WGS84)
	Latitude  (DD MM SS.s):  N 49 24 15.20 (WGS84)
	Altitude (m):            680.231m (WGS84)
        Single|Multiple station: Single


                         +----------------------------+
4 TIMING OF EVENTS:      |                            |
                         |  EVENT REPORTED: POSITIVE  |
                         |                            |
                         +----------------------------+
  
	Event code
	S: observation Start   I: Interruption start
	D: Disappearance       J: Interruption end
	R: Reappearance        B: Blink   F: Flash
	E: observation End     O: Other (specify)
  
	Personal Equation Substracted: No
  
                                                  Comments
	Event   Time (UT)    P.E.   Acc.   
	Code   HH:MM:SS.ss   S.ss   S.ss
  
 	S  - 23:45:00.000          0.15s   :
 	   -             -      -          :
	D  - 23:47:33.063          0.15s   :
	R  - 23:47:35.001          0.15s   :
	   -             -      -          :
	E  - 23:49:00.000          0.15s   :
  
	Duration : 1,94s  +/- 0.3s
	Mid-event : 23:47:34.032


5 TELESCOPE: 
	Type:          Mirror optics  
	Aperture:      400mm        
	Magnification: prime focus (f/5)
	Mount:         EQUATORIAL         
	Motor drive:   YES

6 TIMING & RECORDING:
	Time source: GPS 1PPS Integral GPS Receiver
	Sensor: CCD camera QHY5 III 290
	Recording: It=150ms (6,7 Img/s), uncompressed AVI
	Recording device: PC W7 32b

7 OBSERVING CONDITIONS:
	Atmospheric transparency: GOOD     
	Wind:                     NO    
	Temperature:              10C
	Star image stability:     AVERAGE
	Minor planet visible:     NO

8 ADDITIONAL COMMENTS: 
        Event data details according to the predictions from UKOCL
        Predicted event time was 23:47:43 UTC (+/- 10s) for my observing position.
        Predicted maximum duration was 1.2 seconds with a 5.5 mag drop.
        Position was 18km from predicted central line in S direction
        inside the shadow with a probability of 4.8%.
        
        Asteroid (Jupiter Trojan) is bigger than estimated diameter due to longer duration of occultation.

	Analyzed by Tangra.

        Receiving 10 satellites
        Horizontal Dilution of Precision 0.8