ASTEROIDAL OCCULTATION - REPORT FORM

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

 1 DATE: 15 June 2021                              STAR:  UCAC4 405-072730

  ASTEROID: Cloanthus                              No: 5511

 2 OBSERVER : 
  Name      : Anna Marciniak                         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  - 23:04:00.36   -    - 0.01
  D  - 23:05:57.75   -    - 0.02
  R  - 23:06:01.38   -    - 0.02
  E  - 23:08:05.15   -    - 0.01 
 
                         Duration :   3.63 +/- 0.03
                         Mid-event :  23:05:59.56 +/- 0.02
  
  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: yes

 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   : GPS start exposure times inserted into FITS headers with own software

 7 OBSERVING CONDITIONS: 
  Atmospheric transparency          : good 
  Wind  (km/h)                      : mild
  Temperature (deg C / humid.)      : +17 deg C / humidity 78 %
  Star image stability              : good
  Minor planet visible              : no
  Local conditions (degree)         : star height: 29, Sun height: -14, 
  Local moon conditions (degree)    : Moon height: 0

 8 ADDITIONAL COMMENTS:
  Star magnitude                          : 14.3
  Minor planet magnitude                  : 16.8
  Feed                                    : UKOCL
  Distance (km)                           : 5.8 km
  Faintest star on CCD (mag)              : 15.1
  Exposure time				  : 0.9 s 
  Readout time				  : 0.01 s

  Predicted max. duration (secs) :  2.7 
  Predicted max. drop (mag)      :  2.7
  Predicted mid-event (UT)       : 23:06:00
  Predicted error in time (secs) :  5
  Probability			 : 89.8 %