ASTEROIDAL OCCULTATION - REPORT FORM

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

1 DATE: 3 May 2020                   STAR: TYC 889-00141-1  (10.5 mag)
  ASTEROID: 8350 1989 AG              No:

2 OBSERVER: Name: Marek Zawilski            Abbr:
            Address: 91-473 Lodz, Poland

3 OBSERVING STATION: Nearest cities: Lodz and Poddebice
  Station: Tobolice
  Latitude:  51d 54' 48.3" N
  Longitude: 19d 03' 22.4" E
  Altitude:  140m MSL
  Datum (WGS84 preferred): WGS84

  Single, OR Double or Multiple station (Specify observer's name):
  SINGLE

                         +----------------------------------+
4 TIMING OF EVENTS:      |                                  |
                         |  OCCULTATION RECORDED: NEGAITIVE |
                         |                                  |
                         +----------------------------------+
  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  - 23:31:08    - N/A  - 1    :
    D  -      -                    :  
    R  -   -                       :   
    E  - 23:33:31    - N/A  - 1    :
    
                          Duration : no occultation 
                         Mid-event : 
               Predicted mid-event : 3 May; 23:32:17 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: NTP via Dimension4 using the time server "tempus1.gum.gov.pl",Warsaw, laptop-time synchronized better than 0.01s, response of about 10 Polish ntp time servers checked evry one minute with the use of the professional software by T.Kluwak, regarding the time offset and response delay (both of very low value and stable - offset +0.01s, delay 0.03s at 23:02-23:36); the established earlier laptop clock delay +0.01 s per hour.
  Sensor: ZWO ASI 120MM, shutter set for 100 ms, image resolution 640x480 px, gain 70
  Recording: SharpCap v.3.1.5220 software

7 OBSERVING CONDITIONS:
  Atmospheric transparency: good   Wind: none            Temperature: +10 deg C
  Star image stability: good       Minor planet visible: no 

8 ADDITIONAL COMMENTS:
 
  The light curve analyze using Tangra software and a careful inspection of the screen replay as well as direct watching of the screen during the recording time showed no remarkable drop of star brightness caused by the asteroid. 
  Sky very clear, the Moon nearby did not disturb the seeing.

  Predicted max 1.9 sec duration with 6.7 mag drop.
  Event probability at site : 5.8%
  Distance from center line : 54 km in S direction (near the 1-sigma southern line)
  Local * conditions (Alt,Az): 42°, @230°