ASTEROIDAL OCCULTATION - REPORT FORM

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

 1 DATE: 20 May 2021                              STAR: UCAC4 365-154004

   ASTEROID: (212907) 2007 XO7                           

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

 3 OBSERVING STATION: 
  Nearest city : Suprasl
  Station      : Lipowy Most                 Acc.
  Latitude     : 53 12 31.5 N            -   0.1"
  Longitude    : 23 31 37.9 E            -   0.1"
  Altitude     : 145 MSL                 -   1 m

  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 - 23:48:42.85
  D - 23:50:01.69         +/- 0.20
  R - 23:50:02.89         +/- 0.20
  E - 23:50:59.70  

  Duration: 1.20 s,       +/- 0.28     


  Predicted max. duration (secs) : 0.81
  Predicted max. drop (mag)      : 6.83
  Predicted mid-event (UT)       : 23:50:13
  Predicted error in time        : 10 sec 

  Was your reaction time applied to the above timings? - not relevant
  
 5 TELESCOPE: 
  Type        : NEW  f/4.7                            Aperture   : 254 mm
  Focal length: 1195 mm                               FOV        : 32.37' x 20.23'
  Mount       : equatorial GOTO                       Motor drive: yes

 6 TIMING & RECORDING:
  Time source      : GPS 1PPS  
  Sensor           : QHY 174M GPS
  Mode of recording: 1920x1200, 12 bit FITS, Gain=480
  Mode of recording: Contrast=0, Brightness=0, Gamma=1
  Shutter          : 0.400 s
  Recording        : Laptop Dell Latitiude 3540 (Intel Core i5/RAM 8 GB/SSD 128 GB)
  Recording        : SharpCap 4.0.7806

 7 OBSERVING CONDITIONS: 
  Atmospheric transparency          : fair 
  Wind  (m/s)                       : 5
  Temperature (deg C / humid.)      : 10 / 75
  Star image stability              : good 
  Minor planet visible              : no
  Local conditions (degree)         : star altitude: 17, sun altitude: -14 
  Local moon conditions (degree)    : moon altitude: 9, moon distance: 116, moon phase: +63%

 8 ADDITIONAL COMMENTS:
  Observed star                           : UCAC4 365-154004 
  Star magnitude (mag)                    : 13.67
  Minor planet magnitude (mag)            : 20.5
  Feed                                    : UKOCL, last updated April 25, 2021
  Rank                                    : 7
  Distance (km)                           : in the 1-sigma zone, 57 km outside the central line
  Shadow width (km)                       : 5.2
  Predicted probability OccultWatcher (%) : 3.6
  Predicted combined magnitude (mag)      : 13.7 
  Faintest star on movie (mag)            : 14.7
  Evaluation with Tangra 3.7.3 and AOTA

  9 REMARKS: