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Skywarden,
Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki
taivaanvahti(at)ursa.fi

Ursa Astronomical Association

A fireball in a twilight sky - 9.1.2018 at 08.08 Nurmijärvi Observation number 69408

Visibility IV / V


The light green crescent-shaped, but not well-defined, at first seemed to float down more slowly as it suddenly plunged down at a rapid pace and the color turned yellow and more spherical. As I approached the ground, it quickly faded behind the treetops.



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Additional information
  • Accuracy of the given observation time?
    • 2 min difference possible
  • How long time did you see the fireball fly in the sky?
    • 4 seconds
  • In which direction the fireball disappeared out of sight?
    • North
  • In which altitude the bolide disappeared from your sight?
    • Low near the horizon
  • Brightness of the fireball
    • A fireball in a twilight sky
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