ASTEROIDAL OCCULTATION - REPORT FORM

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

 1 DATE: 31 March 2019                               STAR: UCAC4-475-051755  

  ASTEROID: Aletheia                                 No: 259

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

  Name      : Maciej Jarmoc                          Abrr: 
  Address   : 16-001 Ignatki, Poland

 3 OBSERVING STATION: 
  Nearest city : Bialystok
  Station      : Ignatki          Acc.
  Latitude     : 53 04 07.6 N   - 0.05"
  Longitude    : 23 06 05.1 E   - 0.05"
  Altitude     : 144 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  - 21:44:00.2   -    - 0.1
  D  - 21:45:22.02  -    - 0.09
  R  - 21:45:39.57  -    - 0.06
  E  - 21:46:09.2   -    - 0.1 
 
  Measered duration (secs)  :  16.55
  Measured drop (mag)       :  1.30 mag (Tangra)
  Calculated mid-event (UT) :  21:45:30.30

  Predicted max. duration (secs) : 16.7
  Predicted max. drop (mag)      : 1.29
  Predicted mid-event (UT)       : 21:45:34
  Predicted error in time (secs) : 4 

  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 (Millincam MCH type)
  Mode of recording: Digital Noise Reduction (DNR): OFF, Auto Gain Control (AGC): LOW
  Shutter (SENS-UP): 50 fps, no integration
  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          : good 
  Wind  (km/h)                      : 4
  Temperature (deg C / humid.)      : 1 / 80
  Star image stability              : good 
  Minor planet visible              : yes
  Local conditions (degree)         : star height: 36, sun height: -32, 
  Local moon conditions (degree)    : moon height: below horizon

 8 ADDITIONAL COMMENTS:
  Observed star                           : UCAC4-475-051755
  Star magnitude                          : 11.21
  Minor planet magnitude                  : 12.0
  Feed                                    : IOTA, last updated 01 Feb 2019
  Rank                                    : 100
  Distance (km)                           : inside the shadow - 4 km S from the central line
  Shadow width (km)                       : 218
  Predicted probability OccultWatcher (%) : 100
  Predicted combined magnitude (mag)      : 10.71 
  Faintest star on AVI (mag)              : 12.42
  Evaluation with Tangra 3.6.18 and AOTA 4.6.7.0