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

Ursa Astronomical Association

Bright night shining clouds - 17.7.2014 at 23.50 - 18.7.2014 at 02.15 Mäntsälä, Keravajärvi Observation number 27825

Visibility IV / V

Juha Ojanperä, Porin Karhunvartijat

The only night clouds in Cygnus 2014. The night clouds appeared just before midnight, and they were still visible when I went to bed at 2:30.

The night clouds were in the sky in a sector extending from northwest to east and their maximum height measured from the northern horizon was 110 degrees at best. Later in the night, the play was clearly divided into two in the northwest and northeast.

The night clouds were quite bright, the average brightness in the play was of the third grade, with the brightest forms being Nelonen level. There was almost everything possible in forms. Roughly classified, however, this play was perhaps a belt-wave type play. Tropospheric clouds hampered detection slightly.

I also wrote about the play on my blog .

Brightness: 3-4 (1-5)

Credits: 3 (1-5)

Night cloud forms: I, IIa, IIb, IIIa, IIIb, IVa, IVb, 0

Figure 1. 1:24, northwest north

Figure 2. 1:26, northwest north

Figure 3. 1:35, northwest north

Figure 4. 1:36, Northeast

Figure 5. 1:38, northwest north

Figure 6. 1:40, west-north-east zenith



More similar observations
Additional information
  • Havainto
    • Night shining clouds
  • Cloud coverage in the sky
    • Covered about half of the sky
  • Noctilucent clouds
    • Unusual forms info

      Relatively rarely, there are special shapes in the night shining cloud displays that do not belong to the shapes listed above. Such may be, for example, thick lumpy formations that appear as some kind of patches. They may also be associated with an unusual color tone.

    • 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

Camera: Canon EOS 1100D, lenses: Canon EF-S 18-55mm IS, Samyang 8mm fisheye

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