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Ursa Astronomical Association

A fireball at night, brighter than a full moon - 22.12.2017 at 20.00 Oulu Observation number 69063

Visibility V / V

I saw a fireball fly for about 3-5 seconds from a window that gives straight south. The fireball appeared from my position, looking about south-south-south, and flew salmon west. The ball went out suddenly, though I’m not entirely sure about that, but that impression was left. When it went out (or disappeared) the ball was about southwest-southwest when viewed from my position.

The fireball had a bright and straight yellowish-white tail corresponding to the length in the observation image. The angle between the tail and the horizon was estimated at 30 degrees. Around the song itself, I thought, was a perfectly round (not oval as in the picture) and a reasonably well-defined halo, the middle parts of which were white and the outer perimeter orange-red. The light from the fire and tail was steady, and I didn’t notice any variation in color or intensity before it went out / disappeared. The size of the halo from my position corresponded to the size of my thumb nail (diameter 15 mm) as seen from the length of the arm (about 60 cm).

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Additional information
  • Accuracy of the given observation time?
    • 15 min difference possible
  • How long time did you see the fireball fly in the sky?
    • 5 seconds
  • How the flight of the fireball ended?
    • The fireball disappeared suddenly
  • In which direction the fireball disappeared out of sight?
    • Southwest
  • In which altitude the bolide disappeared from your sight?
    • About 1/3 from the horizon towards the zenith
  • Brightness of the fireball
    • A fireball at night, brighter than a full moon
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