ASTEROIDAL OCCULTATION - REPORT FORM

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

 1 DATE: 07 November 2018                               STAR:  UCAC4 642-21891  

  ASTEROID: 1999TQ220                                     No: 38509

 2 OBSERVERS: 
  Name      : Wojciech Burzynski                    MPC-Code: 
  Address   : 15-345 Bialystok, Zachodnia 15, Poland

  Name      : Maciej Jarmoc                         MPC-Code: 
  Address   : 16-001 Ignatki, Wspolna 16, Poland

 3 OBSERVING STATION: 
  Nearest city : Bialystok
  Station      : Pomigacze
  Latitude     : 53 02 33.2 N
  Longitude    : 23 04 40.1 E
  Altitude     : 142 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  - 20:18:45.6   -    - 0.1                
 E  - 20:20:46.6   -    - 0.1  

 Predicted max. duration (secs) : 1.1
 Predicted max. drop (mag)      : 6.1
 Predicted Mid-event (UT)       : 20:20:10
 Predicted error in time (secs) : 7 

 Was your reaction time applied to the above timings? not relevant, VTI recording
  
 5 TELESCOPE: 
 Type        : Newton  f/5                           Aperture   : 300 mm
 Focal length: 1500 mm                               FOV        : 11.0'x 8.5'
 Mount       : azimuthal                             Motor drive: yes

 6 TIMING & RECORDING:
  Time source      : GPS VTI 1PPS by Tomasz Wezyk, 
  Sensor           : CCDTV videocamera NOVUS NVC GDN5811C-2, 1/3" SONY EXview HAD II
  Mode of recording: Integration time = 0.48 s, 25 fps
  Shutter (SENS-UP): x 24, Digital Noise Reduction (DNR): OFF, Auto Gain Control (AGC): LOW
  Recording        : Laptop Dell Latitiude 3540 (Intel Core i5/RAM 8 GB/SSD 128 GB)
  Recording        : Video Grabber Aver Media EzMaker 7, VirtualDub 2, AVI compressed by Lagarith codec 
  Time insertion   : VTI by Tomasz Wezyk (www.tomasztech.pl)

 7 OBSERVING CONDITIONS: 
  Atmospheric transparency          : poor 
  Wind  (km/h)                      : 4
  Temperature (deg C / humid.)      : 4 / 95
  Star image stability              : good 
  Minor planet visible              : no
  Local conditions (degree)         : star height: 46, sun height: -47, 
  Local moon conditions (degree)    : moon height: below horizon

 8 ADDITIONAL COMMENTS:
  Observed star                           : UCAC4 642-21891
  Star magnitude                          : 12.0
  Minor planet magnitude                  : 18.1
  Feed                                    : IBEROC, last updated 27 October 2018
  Rank                                    : 11
  Distance (km)                           : 12 km N from the central line, 7 km outside the shadow, in the 1-sigma zone
  Shadow (km)                             : 10
  Predicted probability OccultWatcher (%) : 6.1
  Predicted combined magnitude (mag)      : 12.0 
  Faintest star on AVI (mag)              : 14.0
  Evaluation with Tangra 3.6.18.
  Integration time increased to 0.48 s because the observation has been done through thin clouds.

E Frappa comment:The report is stored in my full archives, but I do not systematically publish on Euraster the negative reports 
which do not respect the basic rule of an integration time at least < 1/3 of the predicted max duration (1/4 or 1/5 would be better).
Because when your integration time is > 1/3 of the predicted max duration, a short detection will be undetectable and a detection close 
to the predicted max duration will be a single point in the curve, which is not enough to validate a clear positive event. 
So actually, in these conditions, there is almost no way to obtain a clear positive report