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Ursa Astronomical Association
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Ursa Astronomical Association

Clearly visible night shining clouds - 16.8.2015 at 01.36 - 16.8.2015 at 03.15 Mäntyharju Observation number 41051

Visibility III / V

Markku Siljama, Ursa (Etelä-Suomi)

A two-part night cloud display. Throughout the observation period, in the shallow north, a bright night cloud area moved rapidly to the west, leaving the area behind behind visible for the rest of the night.

01.30 northwest 2 ast clear

01.45 northwest 2 ast bright

02.00 northwest 2 ast moves clearly west

02.15 northwest 2 ast dim

02.30 northwest 2 ast dim

02.45 northwest 2 ast dim + northeast rising dim belts

03.00 northwest 2 ast dim + northeast dim

03.15 northwest 2 ast dim + northeast 2 ast very dim belts


1. at 1.36 northwest

2. at 1.43 northwest 55 mm

3 a.m. 2.02 northwest 55 mm

4. at 2.18 northwest 55 mm

5. at 2.33 northwest 55 mm

6. at 2.47 northeast 55 mm

7. at 2.51 northeast 18 mm, on the right Castor and Pollux

8. at 2.56 north 18 mm, two night cloud areas marked with arrows

Special display, simultaneously northern lights and night clouds. All images processed.

More similar observations
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.

    • 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
    • Clearly visible night shining clouds
Technical information

Canon EOS 1100 D 18-55 mm IS

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