ASTEROIDAL OCCULTATION - REPORT FORM

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

1 DATE: 21 March 2022             STAR: UCAC4 584-008178  (13.3 mag)
  ASTEROID: Loreley                  No: 165 

2 OBSERVER: Name: Marek Zawilski            Abbr:
            E-mail: marek.zawilski@p.lodz.pl
            Address: ul.Julianowska 5/7 m.322, 91-473 Lodz, Poland
            Assitance: Remigiusz Jablonski, Stanislaw Wieclaw

3 OBSERVING STATION: Nearest cities: Lodz 
  Station: Lodz Planetarium, ul.Pomorska 16
  Latitude:  51d 46' 41.2" N
  Longitude: 19d 27' 30.6" E
  Altitude:  225m 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  - 19:54:40      - N/A  1.0   
    D  - 19:55:08.27          0.25               AOTA analysis
    R  - 19:55:13.32          0.10               AOTA analysis
    E  - 19:55:47      - N/A  1.0    
 
                          Duration : 5.05 sec
                         Mid-event : 19:55:10.80
               Predicted mid-event : 21 Mar;19:55:11 UT  +/- 1 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 200 ms, video time resolution 200 ms, image resolution 1024x768 px, gain 72.
  Recording: SHARPCAP v.4.0.8667.0 software.

7 OBSERVING CONDITIONS:
  Atmospheric transparency: good        Wind: none            Temperature: +7 deg C
  Star image stability: good            Minor planet visible: yes

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.
  This was the second positive asteroidal occultation made at the Lodz Planetarium in history.
  

  Predicted max. 5.5 sec. duration with 1.3 mag. drop.
  Event probability at site : 100%
  Distance from center line : 52.5 km in 202° direction, inside the predicted path.
  Local * conditions (Alt,Az): 24°, @283° in Aries.
  Moon (Alt, Az): below the horizon.