ASTEROIDAL OCCULTATION - REPORT FORM

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

1 DATE: 2021/09/07
  STAR: TYC 1867-02366-1
  ASTEROID: (554) Peraga

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: POSITIVE  |
                         |                            |
                         +----------------------------+
  
  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  - 01:15:10    -      -      :
    D  - 01:17:11.92 -      - 0.01 :
    R  - 01:17:14.46 -      - 0.01 :
    E  - 01:19:28    -      -      :

                          Duration : 2.54 +/- 0.014 s
                         Mid-event : 01:17:13.19 +/- 0.007 s
  
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: Linux Ubuntu synchronized by "chrony": 4 x stratum 1 NTP servers, every 32 s,
               ping 10 - 11 ms, 1 sigma < 1 ms
  Sensor: ZWO ASI174MM-C
  Recording: ZWO ASICAP V2.3
  Exposure: 10 ms

7 OBSERVING CONDITIONS:
  Atmospheric transparency: fair  Wind: no   Temperature: 7 deg C
  Star image stability: fair      Minor planet visible: no

8 ADDITIONAL COMMENTS:
  Analyzed using Tangra v3.7.3 and AOTA v4.12.12
  S/N of occulted star: 5.7 (AOTA)

  Observed drop: 1.0 mag (calculated manually in spreadsheet)
  Known double star
  GAIA's RUWE: 11.1 (problem)

  The applied approximate recording delay (4 ms) was based on the report for similar
  hardware configuration and the same both USB setting and ROI, and similar exposure,
  published by Pierre Le Cam on http://www.nocturno.fr/ost/ost.html .

 Personal feed (2021/07/18):
  Event time: 01:17:12 UT
  Error in time: 1 s
  Max duration: 3.7 s
  Star magnitude: 9.9 m
  Asteroid magnitude: 13.4 m
  Combined magnitude: 9.9 m
  Magnitude drop: 3.5 m
  Position: In the shadow, 18 km from the central line
  Probability: 100 %