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Ursa Astronomical Association
Kopernikuksentie 1
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Ursa Astronomical Association

Stock 12 - 26.8.2020 at 00.01 - 26.8.2020 at 03.15 Järvenpää Observation number 93154

Visibility III / V

Ari Jokinen, Etelä-Suomen kosmol. seura

I decided to take a constellation with only stars.

Stock 12’s open constellation Kassiopeija was a little boy in the early days of my hobby in my favorite visual observations so I decided to immortalize it with memories. Not very many pictures have been taken of this, or at least I didn’t find very many of them. The crowd is about 1,200 light-years away in the constellation of Kassiopeija.

Three hours exposure LRGB image.


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Additional information
  • Observation target
    • Deep space object
  • Designation
    • Stock 12
    • Keskitaso
  • Constellation
    • Cassiopeia
  • Star clusters and asterisms
    • Open cluster info

      Open cluster is an irregular group of tens or hundreds of stars. It can be visible as separate stars or a bit fuzzy spot with small instrument.

      There is the open cluster M52 on the right edge of the image. The red emission nebula is the Bubble Nebula. Image Jyrki Grönroos.


      The open cluster M45 aka Pleyades. Image Juha Parvio.


      The pair of the open clusters NGC 869 and NGC 884 aka the Double Cluster in Perseus. Image Lauri Kangas.


      M34 is also an open cluster in Perseus. Image Teppo Laitinen.


      The Wild Duck Cluster M11 is an exceptional dense open cluster. Image Jaakko Asikainen.



      The Ptolemy's Cluster M7 is located in a rich-star area of The Milky Way in Sagittarius. Image Toni Veikkolainen.

Technical information

Atik460Ex, SW Esprit 120ED

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