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Ursa Astronomical Association

A fireball in a twilight sky - 3.1.2017 at 16.00 Vaasa, Vähäkyrö Observation number 59860

Visibility IV / V

Satu Rajamäki

My 11-year-old daughter made the following observation yesterday:

The star, which flew a little distance slowly, split in two, the pieces left in different directions and disappeared from view. This is estimated to have taken place between 4pm and 5pm.

The attached appendix shows 3 steps in the figure. The flight phase is shown at the top. The center shows how the "piece" split in two and the bottom line depicts the flight length of the two pieces before disappearing. There was no sound.

Supplement:

The starry sky was visible at that time, ie there were no clouds, at least in the wind direction. The air direction is estimated to be south-southwest.



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Additional information
  • Accuracy of the given observation time?
    • 1-2 hours difference possible
  • How long time did you see the fireball fly in the sky?
    • 1 second
  • In which altitude the bolide disappeared from your sight?
    • About 1/3 from the zenith towards the horizont
  • Brightness of the fireball
    • A fireball in a twilight sky
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