Contact information

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

Ursa Astronomical Association

A fireball at night, as bright as a full moon - 15.7.2021 at 01.20 Hyvinkää Observation number 99584

Visibility V / V


I thought the fireball was very slowly flying near, but it didn’t flicker and was much bigger and brighter than the light from the plane and it seemed to momentarily increase a bit before it went out so the ball shrank and formed like three dots that then faded. It didn't have a tail all the time. Its direction was from south to southeast. There were two of us observers on the balcony on the fifth floor of the apartment building. The possible sound was obscured by a rattling fan in the doorway, which, when stopped, at least we didn’t hear any reverberation.



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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?
    • 6 seconds
  • How the flight of the fireball ended?
    • The fireball broke into pieces, which faded away
  • In which direction the fireball disappeared out of sight?
    • Southeast
  • In which altitude the bolide disappeared from your sight?
    • About half way between the horizon and the zenith
  • Brightness of the fireball
    • A fireball at night, as bright as a full moon
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