ASTEROIDAL OCCULTATION - REPORT FORM

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

1 DATE (YYYY/MM/DD): 2021/11/25
	STAR:        UCAC4 470-005878
	ASTEROID:    1995 YN
	N°:          19278

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  - 01:30:30.000          0.200s   :
 	   -             -      -           :
	D  - 01:31:41.024          0.200s   :
	R  - 01:31:41.421          0.200s   :
	   -             -      -           :
	E  - 01:32:30.000          0.200s   :
  
	Duration : 0.397s  +/- 0.200s
	Mid-event : 01:31:41.223


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 BlackBox
	Sensor: QHY 5 III 290M
	Recording: It=0.250ms (4 Img/s), uncompressed AVI
	Recording device: PC W7 32b
        Recording software: SharpCap

7 OBSERVING CONDITIONS:
	Atmospheric transparency: GOOD     
	Wind:                     NO    
	Temperature:              -4C
	Star image stability:     BAD SKY CONDITIONS         
	Minor planet visible:     NO

8 ADDITIONAL COMMENTS: 
        Event data details according to the predictions from UKOCL.
        Predicted event time was 01:31:45 UTC (+/- 4s) for my observing position.
        Predicted maximum duration was 0.8 seconds with a 3.9 mag drop.
        Position was 1km from predicted central line in SW direction
        inside the shadow with a probability of 19.4%.

        Exposure time was during recording an occultation changed from 
        100ms to 200ms due to bad sky conditions. 

        Analyzed by Tangra.

        Synchronization of Windows system time was by TimeMemo software 
        and during observation was recorded a special video record with 
        both PC Windows system timestamps and timestamps produced from 
        GPS 1PPS Integral GPS Receiver Blackbox (recorded by own 
        software). Difference between real GPS time and system timestamps of
        disappearance/reappearance in recorded occultation video was aplied.