ASTEROIDAL OCCULTATION - REPORT FORM

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

1 DATE: 2021/02/20  STAR: UCAC4 539-036883  ASTEROID: 2006 WC188  No: 251293

2 OBSERVER: Name: Daniel BLAZEWICZ
            Address: 32-015 Klaj, POLAND

3 OBSERVING STATION: Klaj  Nearest city: Niepolomice (Poland)
  Longitude: E 20 19 04.2 (WGS84)
  Latitude:  N 49 59 33.2 (WGS84)
  Altitude:  211 m (MSL)
  Single station

                         +----------------------------+
4 TIMING OF EVENTS:      |                            |
                         |  EVENT REPORTED: NEGATIVE  |
                         |                            |
                         +----------------------------+
  
  Event code
  S: observation Start   I: Interruption start
  D: Disappearance       J: Interruption end
  R: Reappearance        B: Blink   F: Flash
  E: observation End     O: Other (specify)
  
  Abbreviations
  P.E.: Personal Equation = reaction time (for visual obs)
  Acc.: Accuracy (overall accuracy of the given time)
  
                                                  Comments
  Event   Time (UT)    P.E.   Acc.   
  Code   HH:MM:SS.ss   S.ss   S.ss
  
    S  - 18:34:21    -      -      :
    E  - 18:40:37    -      -      :
  
5 TELESCOPE: Type: NEWTON    Aperture: 350 mm
             Magnification: prime focus f/4.8
             Mount: EQUATORIAL with polar wedge    Motor drive: YES

6 TIMING & RECORDING:
  Time source: NTP Stratum 1, Linux Ubuntu, synchronization every 32 s
  Sensor: ZWO ASI174MM-C
  Recording: ZWO ASICAP V2.3

7 OBSERVING CONDITIONS:
  Atmospheric transparency: poor  Wind: none   Temperature: -1 deg C
  Star image stability: good      Minor planet visible: no

8 ADDITIONAL COMMENTS:
  Exposition time: 250 ms
  Camera temperature: -20 deg C
  Analyzed using Tangra v3.6.17
  S/N of occulted star: 4 - 5 (thin clouds)

 Personal feed (JPL 2021/02/19, Gaia EDR3):
  Event time: 18:36:43 UT
  Error in time: 17 s
  Max duration: 0.5 s
  Star magnitude: 12.1 m
  Asteroid magnitude: 20.7 m
  Combined magnitude: 12.1 m
  Magnitude drop: 8.6 m
  Position: In the 1-sigma zone, 7 km outside the shadow path
  Probability: 1.2%