ASTEROIDAL OCCULTATION - REPORT FORM

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

1 DATE: 23 March 2022             STAR: HIP 58639  (8.1 mag)
  ASTEROID: Paulharris                  No: 5349 

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: 

3 OBSERVING STATION: Nearest cities: Lodz and Poddebice
  Station: Tobolice
  Latitude:  51d 54' 48.1" N
  Longitude: 19d 03' 22.6" E
  Altitude:  136m 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  - 22:14:00      - N/A  1.0   
    D  - 22:14:29.93          0.03               AOTA analysis
    R  - 22:14:30.33          0.03               AOTA analysis
    E  - 22:15:03      - N/A  1.0    
 
                          Duration : 0.40 sec
                         Mid-event : 22:14:30.13
               Predicted mid-event : 21 Mar;22:14:31 UT  +/- 2 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 10 satellites).
  Sensor: ZWO ASI 120MM, shutter set for 50 ms, video time resolution 50 ms, image resolution 640x480 px, gain 50, brightness 13.
  Recording: SHARPCAP v.4.0.8667.0 software.

7 OBSERVING CONDITIONS:
  Atmospheric transparency: very good        Wind: none            Temperature: +2 deg C
  Star image stability: good            Minor planet visible: yes (after disappearance)

8 ADDITIONAL COMMENTS:
 
  The light curve analyze using Tangra software and a careful inspection of the screen replay showed a remarkable drop of the star brightness caused by the asteroid. The star image was stable enough both for the occulted and a guiding star. 
  The D and R times according to the AOTA analysis.
  The observation was made outside the predicted path. Between D and R the asteroid was clearly visible, much brighter than predicted 15.8 mag. Recorded mag. drop was of 1.5 only.
  

  Predicted max. 0.5 sec. duration with 7.7 mag. drop.
  Event probability at site : 9.0%
  Distance from center line : 20.5 km in 168° direction, outside the predicted path, inside the plus 1-sigma zone.
  Local * conditions (Alt,Az): 37°, @170° in Virgo.
  Moon (Alt, Az): below the horizon.