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Ursa Astronomical Association

Bright night shining clouds - 16.7.2011 at 00.20 Turku Observation number 850

Visibility IV / V

Joni Tahkoniemi, Ursa (Länsi-Suomi)

At the beginning of the observation, only a few belts were visible, but fairly quickly
more forms began to appear - also in the southern sky, from which, however, the lower cloud cloud was approaching. The play mainly consisted of sharp belts as well as straight waves.

By one time the lower cloud cloud approaching from the south had already arrived and the cloud cover was 6/8 of the sky. On the other hand, the night clouds had also disappeared into something when only a few single belts were visible.

at 00.20-00.35: 280-60, 15-100, I IIab IIIab 3-4
01:00: 325-30, 15-40, IIab 2-3

More similar observations
Additional information
  • Cloud coverage in the sky
    • Covered 3/4 of the sky
  • Havainto
    • Night shining clouds
  • Noctilucent clouds
    • Waves info

      Waves of noctilucent clouds are short, close groups of clouds.

      Wavy NLC by Jari Luomanen.


      NLC waves by Hannu Määttänen.

    • Band info

      Bands of noctilucent clouds are long, stripe like cloudformation.

      A single, very bright NLC band. Photo by Mikko Peussa.


      On the upper left corner, rising bands are clear on the image. Whereas waves of NLC cover the bottom right side of the image. Photo by Juha Tonttila.

    • Veil info

      The night cloud vail is a vague thin night shining cloud with no clear structure.

      Noctilucent cloud veil with one strong belt formation. Image by Veikko Mäkelä.

  • Brightness of the noctilucent clouds
    • Bright night shining clouds
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