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Ursa Astronomical Association

A fireball at night, as bright as a cresent moon - 12.8.2012 at 00.54 Orimattila, Artjärvi, Tähtikallio Observation number 7048

Visibility IV / V

Panu Lahtinen, Ursa (Etelä-Suomi)

After the "official" program of Ursa's atmospheric meeting was clear, so the gang to use the Persians. I myself tuned to shoot two rational and one video surveillance camera, from which my homemade software stacked maximum 10-second stacks.

Here’s one of the brightest, and definitely the most interesting, Perseidi. Unfortunately, I only had time to see the vanish fading from this, but the flash was eye-catching even though I looked a little past.

The first image from the above-mentioned surveillance camera, start time synchronized with the NTP protocol on stack 00.53.50 and stack duration 10 s.

Another image with a fisheye lens, checked exposure start time 00.53.41 (15 s exposure). I didn’t remember to adjust the settings of this camera after dusk, so the image was pretty dark.

Third image with 24 mm lens, checked exposure start time 00.53.44 (15 s exposure).

In the fourth image, images taken with a 24 mm lens show a smoke ball left by a fireball.

Brightness estimated based on images. Based on the revised times, the visible phase of the fireball was between 00.53.50 and 00.53.56.

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Additional information
  • Accuracy of the given observation time?
    • Maximum of 1 minutes difference possible
  • How long time did you see the fireball fly in the sky?
    • 2 seconds
  • How the flight of the fireball ended?
    • I did not see the end of the fireball
  • In which direction the fireball disappeared out of sight?
    • South
  • In which altitude the bolide disappeared from your sight?
    • About 1/3 from the zenith towards the horizont
  • Brightness in magnitudes
    • -9
  • Brightness of the fireball
    • A fireball at night, as bright as a crescent moon
Technical information

- Samsung SCB-2000, f / 1.0, 3 mm, 10 s maximum stack. - Canon 40D, Peleng 8 mm, f / 3.5, ISO 800, 15 s. - Canon 7D, 24 / 1.4L, f / 1.4, ISO 800, 15 s.

Comments: 1 pcs
Jari Luomanen - 12.8.2012 at 23.23 Report this

Oikein muikea tallenne tai pikemminkin tallenteet! Vana on kyllä tosi komea.

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