Contact information

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

Ursa Astronomical Association

Väripilviä - 30.9.2012 at 15.51 Tampere Observation number 8184

Visibility III / V

Markku Siljama, Ursa (Etelä-Suomi)

During the day I walked over the bridge over Tammerkoski and saw clouds of color around the Sun and when I did not see any other Skywardens there I photographed the clouds of color walking away .. :)


Additional information
  • Common atmospheric phenomena
    • Iridescent clouds info

      Iridescent clouds are clouds colored in the colors of spectra in the vicinity of a light source. The phenomenon is very common.

      Like a corona, a clouds of color are formed when light is scattered in small water droplets. Fineest colors are seen in cirrocumulus and altocumulus lenticularis-type clouds. The more mundane-looking color clouds, on the other hand, are lower clouds.

      Like coronae, color clouds usually occur only very close to the Sun. Their colors are more clearly visible through sunglasses.

      The word "iridescent clouds", clouds with colors, may sound the same as any colored cloud that exists. However clouds colored reddish by morning or evening dusk are not the same thing. The ridescent clouds specifically show the full color of spectrum. The iridescent clouds are not a synonym for the also colorful mother-of-pearl -clouds. These polar stratospheric clouds are a different phenomenon that occurs and very low winter temperatures hight in the atmosphere.

      Cloud iridescence on altocumulus lentocularis. Photo by Panu Lahtinen.

       

      Colors of spectrum on an altocumulus cloud. Image by Matti Helin.

      Iridescent Stratocumulus cloud. Photo by Panu Lahtinen.

       

      Sometimes it may be difficult to determine, if the colors on the cloud belong to a corona or cloud irridescence. This one could be marked with either one or both of the phenomena identifications. Image by Marko Myllyniemi.

Technical information

Olympus SZ-10

Comments: 1 pcs
Mikko Peussa - 30.9.2012 at 23.46 Report this

Juu, ne kannattaa napata pois kuleksimasta nopeasti. Aika äkkiä tilanne muuttuu ja ne häviää. Tosin, ei ne nyt Auringon ympärillä ole vaan aika paljon lähempänä Tammerkosken sillan havaitsijaa, heh :)

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