ASTEROIDAL OCCULTATION - REPORT FORM

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

1 DATE (2022/08/04):      STAR: UCAC4 335-091459    COMET: 337P/WISE

2 OBSERVER: Name: Anna Marciniak                EAON Abbr:
  Address   : Astronomical Observatory Institute, A. Mickiewicz University, Sloneczna 36, Poznan, Poland

3 OBSERVING STATION: Nearest city: Legionowo (Poland)
  Nearest city : Poznan
  Station      : Borowiec          IAU obs code: 187
  Latitude     : 52 16 36.8 N   
  Longitude    : 17 04 30.8 E   
  Altitude     : 123 MSL

  Single, OR Double or Multiple station (Specify observer's name):


                         +----------------------------+
4 TIMING OF EVENTS:      |                            |
                         |EVENT REPORTED: INCONCLUSIVE|
                         |                            |
                         +----------------------------+
  
  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)
  
  Abbreviations
  P.E.: Personal Equation = reaction time (for visual obs)
  Unc.: Uncertainty (global uncertainty on the given time)
  
                                                  Comments: Observed a miss
  Event   Time (UT)    P.E.   Unc.   
  Code   HH:MM:SS.ss   S.ss   S.ss
  
     S  -20:32:16  -      -      :
     E  -20:34:22  -      -      :

  Was your reaction time applied to the above timings?

 5 TELESCOPE: 
  Type        : Newton  f/4.5                          Aperture   : 400 mm
  Focal length: 1800 mm                                FOV        : 27'x 30'
  Mount       : paralactic                             Motor drive: no

 6 TIMING & RECORDING:
  Time source      : GPS++
  Sensor           : Andor Zyla 5.5 camera with sCMOS sensor
  Mode of recording: Binning 2x2, Image size: Full
  Shutter (SENS-UP): Electronic
  Recording        : Personal Computer
  Recording        : Own software
  Time insertion   : Start exposure times inserted into FITS headers with own software

 8 ADDITIONAL COMMENTS:
  Star magnitude                          : 12.2
  Comet magnitude                         : 19.4
  Feed                                    : CometOcc
  Distance (km)                           : 135 km
  Faintest star on CCD (mag)              : 14.7
  Exposure time				  :  0.50 s 
  Readout time				  :  0.01 s

  Predicted max. duration (secs) : 3.0
  Predicted max. drop (mag)      : 7.0
  Predicted mid-event (UT)       : 20:33:16
  Predicted error in time (secs) : 12
  Probability			 : 13 %
  Sun altitude: -14 deg
  Comet altitude: 12 deg
  Moon distance: 43 deg, 
  Moon altitude: 4 deg
  Moon illumination: +43 %

About 8 s after the expected event, the star escaped from the frame (drift scan).
No occultation from 20:33:16 UT to 20:33:24 UT.
On 20:32:39 UT it looks like a cosmic particle hit the camera sensor.

Photometry software used: Tangra3
Data reductions by Wojciech Burzyński.