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

Ursa Astronomical Association

Bright night shining clouds - 1.8.2021 at 23.32 - 2.8.2021 at 03.45 Helsinki Observation number 100144

Visibility IV / V


The best bright phase was half the night on both sides. Later, large clouds always flooded in front, sometimes covering the night clouds, which were at least clearly visible almost all the time. At first, night clouds occurred from west to north, later only northwest-north. From about 3 o'clock the night clouds were no longer mocking only faintly between the norm clouds. Figure 1 was taken at 00.09. Figure 2 is a 269-frame video summary of the entire observation period.

Later, another still photo with "sound irons" taken at 00.28 was added based on Pentti Arpalahti's comment.



More similar observations
Additional information
  • Havainto
    • Night shining clouds
  • Cloud coverage in the sky
    • Covered 1/8 of the sky
  • 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.

Comments: 4 pcs
Pentti Arpalahti - 2.8.2021 at 11.56 Report this

Videon viiden sekunnin kohdalla taitaa näkyä vasemmalla puolella ääniraudan muotoinen vyörakenne, joka oli kauden kirkkain yökkönen ja ikävästi peittyi pian normipilven alle. Se oli liian hankalassa kulmassa ikkunasta kuvattavaksi. 

Georg Kieninger - 2.8.2021 at 12.18 Report this

Kiitos kommentista, lisäsin vielä yhden kuvan. Toivottavasti osasin poimia esiin oikean (sinun tarkoittamasi) kuvan.

Pentti Arpalahti - 2.8.2021 at 13.25 Report this

Joo, tuo taisi olla kirkkauden huippukohta, jota päälle lankeava musta verho vielä korosti.

Mikko Peussa - 2.8.2021 at 14.11 Report this

Pentti: Sama kirkas kohta klo 00.31 Salon Teijosta. Lisäsin myös havaintooni. Tuon jälkeen sitten pilvet alkoi tulla eteen ja yöpilvetkin hiipua.

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