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Ursa Astronomical Association
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Ursa Astronomical Association

Northern lights - 2.9.2013 at 00.21 - 2.9.2013 at 00.50 Helsinki Observation number 17893

Visibility I / V

After climbing on Malminkartano's peak northern direction has to be checked with camera although naked eye didn't see anything for sure. Seeing was quite good. I were able to distinguish weakly even Milky Way. Very faint auroras could be detected in pictures after patient LR manipulation, er,  I mean processing. Picture was taken at 0:26.

More similar observations
Additional information
  • Aurora brightness
    • Can only be seen in photos
  • Observed aurora forms
    • Veil info

      Veil is the most bland and very common form of aurora. It usually covers its homogeneous dim glow over a wide area of the sky at once. Most often, the veil is seen in the calmer and quiet phase of the night after the aurora maximum as a background for other forms. The veil can also occur alone and in that case it will be quite difficult to reliably identify as an aurora, especially at a observation site which has a lot of light pollution.

      A similar glow of light can also be caused by airborne moisture, smoke, or a very thin layer of clouds that reflects the light that hits them. However, clouds can also be used to identify veil, especially if the middle or upper cloud appears dark against a lighter background, then it is very likely to be aurora veil if the brightness of the background sky is not due to the rising or falling Moon or Sun. When photographing, very long exposure times usually reveal the green colour of the veil auroras.

      Veil and rays. Photo by Esa Palmi.

      Red aurora veil. Photo by Marko Mikkilä.


      Veil. Photo by Milla Myllymaa.


      Aurora veil that changes color from green at the lower edge through purple to blue at the top. Photo by Jaakko Hatanpää.


      Dim green veil. Photo by Jarmo Leskinen.


      Radial aurora band surrounded by veil. Photo by Jussi Alanenpää.

  • Colors with unaided eye and other features
    • Green auroras info

      Green, seen with the naked eye, is one the most common colors of the aurora. The green color is derived from atomic oxygen.

      Green auroras. Lea Rahtu-Korpela.

      Green auroras. Photo by Juha Ojanperä.

Comments: 1 pcs
Tom Eklund - 2.9.2013 at 10.59 Report this

Aiemmin sanottiin, että reposia näkee eteläisessä Suomessa todella harvoin, sitten niitä ruvettiin katselemaan ainakin Kanta-Hämeessä sekä Pirkanmaalla ja nähtiin joinakin vuosina melkein koko ajan. Sitten sanottiin, että Helsingistä ne kuitenkin ovat paljon harvinaisempia ja luulenpa vaan, ettei etelä-rannikko ole riittävän kaukana Kanta-Hämeestä, jotta mahdollisuudet voisivat muuttua luokasta "melkein joka yö" luokkaan "tosi harvoin." Juuri tälläiset havainnot venyttävät noita oikeaksi uskotun rajoja, jos vain joku viitsii näitä havaintoja tehdä.

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