ASTEROIDAL OCCULTATION - REPORT FORM

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

1 DATE (YYYY/MM/DD):	2022/11/08
	STAR:		HIP 18770
	ASTEROID:	2000 QY24
	N°: 		122331

2 OBSERVERS: 
	Name: Leszek Benedyktowicz        PTMA SOPiZ
        E-mail: lechben@go2.pl
        Address: Krakow, Poland

3 OBSERVING STATION: 
	Nearest city:            Balice
	Station:                 mobile station
	Longitude (DD MM SS.s):    E 019 47 05.39 (WGS84)
	Latitude    (DD MM SS.s):  N  50 04 07.89 (WGS84)
	Altitude (m):      238 m (WGS84)
        Single|Multiple station: Single


                         +----------------------------+
4 TIMING OF EVENTS:      |                            |
                         |  EVENT REPORTED: UNCERTAIN |
                         |                            |
                         +----------------------------+

	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)
  
                                                  Comments
  Event   Time (UT)    P.E.   Acc.   
  Code   HH:MM:SS.ss   S.ss   S.ss

    S  -  19:43:47.00 -
    D  -  19:44:20.86  +/- 0.02s
    R  -  19:44:20.94  +/- 0.02s
    E  -  19:44:54.00 -      
  
        Duration : 0.08  +/- 0.03s
        Mid-event : 19:44:20.9 +/- 0.03s
        
5 TELESCOPE:
        Type: Schmidt-Cassegrain
        Aperture: 203 mm
        Focal length: 1000 mm (reducer 0.5x)
        Mount:  azimuthal GoTo
        Motor drive: Yes
        Filter: 

6 TIMING & RECORDING:
        Time source: GSP Timebox Shelyak
        Sensor: ZWO ASI 120MM
        Recording:  40ms integration (Exposure= 0,04 s)
        Recording device: laptop ASUS, SharpCap 3.2 (Windows10)
        Time  insertion: laptop time corrected timebox-GPS Shelyak 

7 OBSERVING CONDITIONS:
        Atmospheric transparency: good
        Wind: NO
        Temperature: 3 °C 
        Star image stability: good
        Minor planet visible:  NO

8 ADDITIONAL COMMENTS (by W. Burzynski):  

Seems to be a positive event. 
At the same second as the prediction. 
The predicted mag drop of 11 was not achieved - this could mean an unknown binary star or a too slow shutter speed.
The prediction gave a maximum 0.4 second occultation, and so was the shutter speed.
This dipped exposure was still catching light when the star was not fully occulted.
Possibly hence the incomplete decrease in brightness by the predicted magnitude 11. 
In the WDS catalog, however, there is nothing about the double star.