ASTEROIDAL OCCULTATION - REPORT FORM

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

1 DATE: 20 July 2022             STAR: UCAC4 381-163644  (13.0 mag)
  ASTEROID: Veeder               No: 3510

2 OBSERVER: Name: Marek Zawilski            Abbr:
            E-mail: marek.zawilski@p.lodz.pl
            Address: ul.Julianowska 5/7 m.322, 91-473 Lodz, Poland
            Assistance: none

3 OBSERVING STATION: Nearest cities: Lodz and Poddebice
  Station: Tobolice
  Latitude:  51d 54' 46.1" N
  Longitude: 19d 03' 21.5" E
  Altitude:  147 m 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
  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  - 23:35:01      - N/A  1.0   
    D  -     
    R  -          
    E  - 23:37:00      - N/A  1.0    
 
                          Duration : none
                         Mid-event : none
               Predicted mid-event : 20 Jul;23:35:53 UT  +/- 5 sec

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

5 TELESCOPE: Type: Cassegrain       Aperture: 203mm    Magnification: ---
             Mount: Equatorial      Motor drive: YES   Foc.length: 2032mm reduced to 1016mm

6 TIMING & RECORDING:
  Time source: Laptop time controlled by the GPS Shelyak TimeBox device (time error +0.000 s with 8 satellites).
  Sensor: ZWO ASI 120MM, shutter set for 300 ms, video time resolution 300 ms, image resolution 1024x768 px, gain 89, brightness 16.
  Recording: SHARPCAP v.4.0.8949.0 software.

7 OBSERVING CONDITIONS:
  Atmospheric transparency: good        Wind: none            Temperature: +16 deg C
  Star image stability: average                 Minor planet visible: no 

8 ADDITIONAL COMMENTS:
 
  The light curve analyze using Tangra software showed no drop of the star brightness caused by the asteroid. The star image was stable for the occulted and comparison star. 
  No light drop longer than 0.30 s recorded.
  The observation was made outside the predicted path, inside the 1-sigma-zone.
 

  Predicted max. 1.0 sec. duration with 2.5 mag. drop.
  Event probability at site : 12.0%
  Distance from center line : 30.7 km in 178° direction, inside the 1-sigma-zone.
  Local * conditions (Alt,Az): 24°, @180° in Aquarius.
  Moon (Alt, Az): 14°, @90°, did not disturb the observation.