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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

Dim night shining clouds - 6.8.2021 at 00.13 - 6.8.2021 at 03.39 Helsinki Observation number 100252

Visibility II / V

Just and just got through the light pollution. At an altitude of about 10 degrees between the northwest and the northeast, there were quite a few slender strands. Due to urban lighting, the eyes cannot adapt to seeing such dim objects. When preparing the rapeseed, the 1:50 narrow northern sector was completely dark. The observation window would, of course, still be open for more than two hours.

Edit. The observation window is open and you will come again. The terrain observation was 0:13 - 0:30 and after two the latest from the previous night continued in the north.

Edit 2. In the northwest, half past four had spots at 15 degrees.

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Additional information
  • Havainto
    • Night shining clouds
  • Cloud coverage in the sky
    • Very small area
  • 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.

  • Brightness of the noctilucent clouds
    • Dim night shining clouds
Comments: 1 pcs
Timo Alanko - 6.8.2021 at 06.29 Report this

Vaasassa näyttää olleen matalalla horisontissa pitkä vyö. Puoli kolmen jälkeen alkoi nousta kohti zeniittiä. Mitään kovin kirkasta ei ollut liikkeellä. 

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