Contact information

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

Ursa Astronomical Association

Clearly visible night shining clouds - 13.7.2021 at 00.28 - 13.7.2021 at 02.00 Sysmä Observation number 99508

Visibility III / V

Arja-Sisko Airila, Ursa (Etelä-Suomi)

The illuminating night clouds began to appear dim after midnight high in the west, east, and south sky, but then they disappeared. In the northern sky, night cloud bands were visible from the entire width of the sky at 1 o'clock, in the northeast a particularly brighter night cloud cluster (Fig. 1 1:17). By two o'clock the night clouds had risen almost to zenith, filling half the sky. The sky was clear, the weather was calm, the temperature was +19. There were commendably enough mosquitoes.

Pictures 1. Northeast 1:17, 2nd west 00:32, 3rd northwest 1:15, 4th north 2:00.



More similar observations
Additional information
  • Havainto
    • Night shining clouds
  • Cloud coverage in the sky
    • Covered about half of the sky
  • 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.

Technical information

Canon PowerShot

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