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

Ursa Astronomical Association

Bright night shining clouds - 1.8.2011 at 23.30 Turku Observation number 844

Visibility IV / V

Joni Tahkoniemi, Ursa (Länsi-Suomi)

The bright night clouds of the previous night in mind I cycled to the nearby bird tower with the shooting equipment. Along the way, I was already noticing a slightly night-cloudy structure in the southern sky, but as soon as I reached the observation site, the first shapes began to brighten in a northerly direction, making sure there was no pointless trip. This time, too, bright night clouds hit the spot, although it meets a small area focused on the sky. On the other hand, the shapes were more clearly visible than in the previous night.

More night clouds .

23:30: ???, 05-20, I IIa 1-2
00.00: 335-025, 05-25, I IIa, IVab 1-4
00:30: 315-040, 02-25, I IIa IIIb, IVbc 1-4
01:00: 295-055, 01-20, I IIa IIIb 1-4



More similar observations
Additional information
  • Cloud coverage in the sky
    • Covered 1/4 of the sky
  • Havainto
    • Night shining clouds
  • Noctilucent clouds
    • Swirl info

      Swirls are curved night shining cloud forms. For example, a single night cloud belt or group of waves may be curved on a clear bend.

      The arrow indicates a slight vortex in the night cloud belt. Photo by Joni Tahkoniemi.

      Strong swirls in image taken by Veikko Mäkelä.

    • 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
Technical information

Canon 40D + EF-S 17-85mm f / 4-5.6

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