ASTEROIDAL OCCULTATION - REPORT FORM

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

1 DATE: 29 October 2019                   STAR: TYC 1932-00469-1  (10.1 mag)
  ASTEROID: Sylvia (+Remus)               No: 87

2 OBSERVER: Name: Artur Wrembel, Wojciech Broczkowski            Abbr:
            Address: Zielonczyn at Bydgoszcz, Poland

3 OBSERVING STATION: Nearest cities: Bydgoszcz
  Station: Tobolice
  Latitude:  53d 09' 10.4" N
  Longitude: 17d 48' 03.0" E
  Altitude:  80m 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
  Start observation   Interrupt-start   Disappearance   Blink   Flash
  End observation     Jnterrupt-end     Reappearance    Other (specify)

                                                  Comments
  Event   Time (UT)    P.E.   Acc.   
  Code   HH:MM:SS.ss   S.ss   S.ss
  
    S  - 23:37:04    - N/A  - 1     :
    D  - 23:39:29.20  -     - 0.08  :  D rapid
    R  - 23:39:48.40  -     - 0.08  :  a moment of full brightness regaining, R on two frames 48.38 and 38.40, gradual
    E  - 22:44:03    - N/A  - 1     :
  
                          Duration : 19.2 s
                         Mid-event : 22:35:38.8
               Predicted mid-event : 29 Oct; 23:39:43 UT  +/- 2 sec

  Was your reaction time applied to the above timings? N/A

5 TELESCOPE: Type: Maxutov-Newton Mn-86       Aperture: 203mm    Magnification: ---
             Mount: Equatorial     Motor drive: YES   Foc.length: 1200 mm 

6 TIMING & RECORDING:
  Time source: UTC video time inserter DCF-77, version Cuno (around 2005).
  Sensor: Tayama night vision v.TC-3182, system CCIR, 25 fps.
  Recording: filmed from screen by Sony-Cybershot camera as a mpg file.

7 OBSERVING CONDITIONS:
  Atmospheric transparency: very good   Wind: none              Temperature: -2 deg C
  Star image stability: good       Minor planet visible: no

8 ADDITIONAL COMMENTS:
 
  The D and R times were found from a direct screen view of the recording with the time display of 25 fps.
  The light curve analyze using Tangra software by M.Zawilski after converting the recording file into "avi" format. Unfortunately, only the target star seen in the field of view,
  therefore lightcurves for D and R have been found separately. S/N was about 2.5-2.7. The D and R times shown in the lightcurve images are not fully compatible with the given above due to   undistinct display of some fractions of seconds obtained from the time inserter. So, the accuracy of both times have been decreased (see above).
  The dis- and reappearance clearly noticed on screen during the observation and the recording analyze.

  Predicted max 23.0 sec duration with 3.3 mag drop.
  Event probability at site : 94%
  Distance from center line : 93 km
  Local * conditions (Alt,Az): 29°, @84°