ASTEROIDAL OCCULTATION - REPORT FORM

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

 1 DATE: 25 December 2021                              STAR: UCAC4 615-005795

  ASTEROID: Gvishiani                                  No: 6574

 2 OBSERVER: 
  Name      : Maciej Borkowski                               
  Address   : 16-001 Ksiezyno, Poland

 3 OBSERVING STATION: 
  Nearest city : Bialystok
  Station      : Ksiezyno                   Acc.
  Latitude     : 53 4 33.7 N            -   0.1"
  Longitude    : 23 6 07.8 E            -   0.1"
  Altitude     : 145                    -   1m

  Datum (WGS84 preferred): WGS84

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

 4 TIMING OF EVENTS:  
  +----------------------------------------------+
  |       OCCULTATION RECORDED: NEGATIVE         |
  +----------------------------------------------+
  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  - 20:11:19.9
  E  - 20:13:46.3        

  Calculated mag drop:  

  Predicted max. duration (secs) : 3.5
  Predicted max. drop (mag)      : 9.0
  Predicted mid-event (UT)       : 20:12:21
  Predicted error in time (secs) : 3

  Was your reaction time applied to the above timings? - not relevant
  
 5 TELESCOPE: 
  Type        : Newton f/6                            Aperture   : 200 mm
  Focal length: 1200 mm                               FOV        : 20'x 13'
  Mount       : azimuthal                             Motor drive: no

 6 TIMING & RECORDING:
  Time source      : smopiVTI (GPS time)  
  Sensor           : Runcam Eagle 2 Pro with 0,5 GSO focal reducer
  Mode of recording: 8 bit AVI, Gain: 7/9
  Shutter          : 0.04 s (night shutter 1)
  Brightness       : 156
  Zoom             : 1
  Recording        : HP EliteBook 8470p (Windows 10 Intel Core i5 2.60GHz RAM 8 GB)
  Recording        : VirtualDub2 build 44015

 7 OBSERVING CONDITIONS: 
  Atmospheric transparency          : good 
  Wind  (m/s)                       : 2
  Temperature (deg C / humid.)      : -6 / 87
  Star image stability              : good
  Minor planet visible              : no
  Local conditions (degree)         : star altitude: 61 SW, sun altitude: -51
  Local moon conditions (degree)    : below the horizon

 8 ADDITIONAL COMMENTS:
  Observed star                           : UCAC4 615-005795
  Star magnitude (mag)                    : 9.0
  Minor planet magnitude (mag)            : 18.0
  Feed                                    : IBEROC, last updated November 11, 2021
  Rank                                    : 90
  Distance (km)                           : 35 km outside 1 - sigma zone
  Travel distance (km)                    : 62 km SE
  Shadow width (km)                       : 26
  Predicted probability OccultWatcher (%) : 0.0
  Predicted combined magnitude (mag)      : 9.0
  Faintest star on AVI (mag)              : 12.5
  Evaluation with Tangra 3.7