ASTEROIDAL OCCULTATION - REPORT FORM

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

 1 DATE: 9 October 2021                          STAR: UCAC4-505-039433

  ASTEROID: Rotraut                              No: 874

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

 3 OBSERVING STATION: 
  Nearest city : Poznan
  Station      : Chalin          IAU obs code: -
  Latitude     : 52 36 14.0 N   
  Longitude    : 16 02 33.4 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  - 23:40:00.52   -    - 0.02
  D  - 23:42:19.92   -    - 0.15
  R  - 23:42:22.80   -    - 0.15
  E  - 23:44:16.30   -    - 0.02 
 
                         Duration :    2.88 +/- 0.21
                         Mid-event :  23:42:21.36 +/- 0.15
  
  Was your reaction time applied to the above timings? - not applicable.
  
 5 TELESCOPE: 
  Type        : Cassegrain f/0.19                      Aperture   : 350 mm
  Focal length: 1855 mm                                FOV        : 30'x 35'
  Mount       : altazimuth                             Motor drive: yes

 6 TIMING & RECORDING:
  Time source      : GPS++
  Sensor           : Andor Zyla 5.5 camera with sCMOS sensor
  Mode of recording: Binning 4x4, 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)                      : none
  Temperature (deg C / humid.)      : +6 deg C / humidity 60 %
  Star image stability              : good
  Minor planet visible              : no
  Local conditions (degree)         : star height: 15, Sun height: -43, 
  Local moon conditions (degree)    : Moon height: below horizon

 8 ADDITIONAL COMMENTS:
  Star magnitude                          : 12.5
  Minor planet magnitude                  : 16.1
  Feed                                    : IOTA
  Distance (km)                           :  9.5 km
  Faintest star on CCD (mag)              : 13.6
  Exposure time				  : 0.3 s 
  Readout time				  : 0.02 s

  Predicted max. duration (secs) :  3.3 
  Predicted max. drop (mag)      :  3.6
  Predicted mid-event (UT)       : 23:42:18
  Predicted error in time (secs) :  1
  Probability			 :  99.6 %