ASTEROIDAL OCCULTATION - REPORT FORM

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

 1 DATE: 16 August 2022                           STAR: UCAC4 392-121453

   ASTEROID: Ulla                                 No: 909

 2 OBSERVER : 
  Name      : Julia Perla                         Abrr: 
  Address   : Astronomical Observatory Institute, A. Mickiewicz University, Sloneczna 36, Poznan, Poland

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

  Datum (WGS84 preferred): WGS84

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

 4 TIMING OF EVENTS:  
  +----------------------------------------------+
  |       OCCULTATION RECORDED: POSITIVE         |
  +----------------------------------------------+
  Type of event:
 "S"tart observation   "I"nterrupt-start   "D"isappearance   "B"link   "F"lash
 "E"nd observation     "J"nterrupt-end     "R"eappearance    "O"ther (specify)

  Event   Time (UT)    P.E.   Acc.   
  Code   HH MM SS.ss   S.ss   S.ss
  
  S  - 21:25:28.13   -    - 0.01
  D  - 21:26:09.44   -    - 0.25
  R  - 21:26:15.05   -    - 0.25
  E  - 21:27:01.46   -    - 0.01 
 
                         Duration :   5.61 s +/- 0.35 s
                         Mid-event :  21:26:12.25 UT +/- 0.25 s
  
  Was your reaction time applied to the above timings? - not applicable.
  
 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

 7 OBSERVING CONDITIONS: 
  Atmospheric transparency          : good 
  Wind  (km/h)                      : 9
  Temperature (deg C / humid.)      : +23 deg C / humidity 75 %
  Star image stability              : good
  Minor planet visible              : yes
  Local conditions (degree)         : star height: 26, Sun height: -22, 
  Local moon conditions (degree)    : Moon height: 11 deg, Moon distance: 83 deg

 8 ADDITIONAL COMMENTS:
  Star magnitude                          : 12.1
  Minor planet magnitude                  : 13.9
  Feed                                    : IOTA
  Distance (km)                           : -64.0 km
  Faintest star on CCD (mag)              : 14.8
  Exposure time				  : 0.5 s 
  Readout time				  : 0.01 s

  Predicted max. duration (secs) :  8.5 
  Predicted max. drop (mag)      :  1.9
  Predicted mid-event (UT)       : 21:26:10
  Predicted error in time (secs) :  1.8
  Probability			 : 39.1 %