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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

M31 - 18.11.2021 at 19.00 - 18.11.2021 at 20.30 Järvenpää Observation number 102403

Visibility IV / V

Eemil Pietilä, Ursa (Etelä-Suomi)

The weather became clear for a moment, so I decided to add a little more exposure to my Andromeda picture. Now the total exposure is about 4.5 hours. The details came out nicely. I also decided this time to edit more natural colors. A nice addition was the removal of the stars with Statnet ++ so that I could handle them separately and thus managed to remove the halos more efficiently.

More similar observations
Additional information
  • Observation target
    • Deep space object
  • Designation
    • M31
  • Weather
    • Nyt viimeisellä kerralla jouduin heittämään osan kuvista pois, sillä välillä kuvakenttään ilmestyi pilviä. Myös kuu loisti täysikuuna taivaalla, joten mikään optimitilanne ei ollut.

  • Galaxies
    • Spiral galaxy info

      Spiral galaxy is a stellar system where there are outwards arched spiral arms from roundish (spiral galaxies) or bar-shaped (barred spiral galaxies) central condensation.

      The apparent shape of spiral galaxied depends on out observation direction. From above they are quite round. From the side they lens-shaped with a bulge in the middle.

      Generally a rather large instrument, good weather conditions and observational expereince are needed to see spiral arms. Usually spiral galaxies look like a fuzzy spots.

      Spiral galaxy M33 in Triangulum. Image Tero Turunen.


      Andromeda Galaxy M31. There are also galaxies M110 (upper right corner) and M32 (lower left corner) in this image. Image Pekka Peura.

      M101 aka Pinwheel Galaxy in Ursa Major. Image Samuli Vuorinen.


      Spiral galaxy IC 342 aka Hidden Galaxy in Camelopardalis. Image Timo Inkinen.

      A sketch of spiral galaxy NGC 7331 in Pegasus. Image Juha Ojanperä.

Technical information

80 mm Orion ST80-A lens telescope, F400 mm, f / 5.0, Canon EOS 1200D (full Spectrum), ISO 3200, 30 sec x 500, Optolong UV / IR Cut, iOptron Skyguider Pro

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