ASTEROIDAL OCCULTATION - REPORT FORM

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

 1 DATE: 21 March 2020                              STAR: UCAC4 541-046735 

  ASTEROID: 1999 RK58                                 No: 91456

 2 OBSERVERS: 
  Name      : Wojciech Burzynski                    Abrr: BZY
  Address   : 15-345 Bialystok, Poland

 3 OBSERVING STATION: 
  Nearest city : Bialystok
  Station      : Ignatki-Borkowski           Acc.
  Latitude     : 53 04 33.6 N            -   0.1"
  Longitude    : 23 06 07.9 E            -   0.1"
  Altitude     : 145 MSL

  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  - 21:38:12.8      -     - 0.1
  E  - 21:41:00.0      -     - 0.1 

  Predicted max. duration (secs) : 2.6
  Predicted max. drop (mag)      : 4.62
  Predicted mid-event (UT)       : 21:40:25
  Predicted error in time (secs) : 19 

  Was your reaction time applied to the above timings? - not relevant, D-VTI recording
  
 5 TELESCOPE: 
  Type        : Newton  f/5                           Aperture   : 300 mm
  Focal length: 1500 mm                               FOV        : 12.89'x 8.06'
  Mount       : azimuthal                             Motor drive: yes

 6 TIMING & RECORDING:
  Time source      : GPS 1PPS  
  Sensor           : QHY 174M GPS, CMOS cooled camera
  Mode of recording: 960x600, 8 bit AVI, Amp Noise Reduction=On, Gain=480, USB Traffic=0, Contrast=0, Brightness=0, Gamma=1
                     GPS Calibration LED=On, GPS Freq Stabilization=On
  Shutter          : 0.250 s
  Recording        : Laptop Dell Latitiude 3540 (Intel Core i5/RAM 8 GB/SSD 128 GB)
  Recording        : SharpCap 3.2.6248.0

 7 OBSERVING CONDITIONS: 
  Atmospheric transparency          : good 
  Wind  (km/h)                      : 3
  Temperature (deg C / humid.)      : -3 / 70
  Star image stability              : good 
  Minor planet visible              : no
  Local conditions (degree)         : star altitude: 45, sun altitude: -36, 
  Local moon conditions (degree)    : below horizon

 8 ADDITIONAL COMMENTS:
  Observed star                           : UCAC4 541-046735
  Star magnitude (mag)                    : 13.4
  Minor planet magnitude (mag)            : 18.0
  Feed                                    : ITALOccult, last updated Mar 12, 2020
  Rank                                    : 10
  Distance (km)                           : 50 km outside the 1-sigma zone
  Travel distance (km)                    : 106 km SE
  Shadow width (km)                       : 7
  Predicted probability OccultWatcher (%) : 0.8
  Predicted combined magnitude (mag)      : 13.38 
  Faintest star on AVI (mag)              : 15.48
  Evaluation with Tangra 3.6.23