M101 - 5.9.2021 at 00.30 - 5.9.2021 at 02.30 Järvenpää Observation number 100989

Visibility III / V

Eemil Pietilä, Ursa (Etelä-Suomi)

It was intended to photograph the Swirl Galaxy, but the pictures turned into the Windmill Galaxy. The filming trip can therefore be considered a successful failure. About 2 hours of exposure has been collected for this.

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Additional information

Observation target
- Deep space object
Constellation
- Ursa Major
Galaxies
- Spiral galaxy
  
  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.

Designation
- M101
Weather
- Sää oli täysin selkeä.

Technical information

80 mm Orion ST80-A lens telescope, F400 mm, f / 5.0, Canon EOS 450D, ISO 1600, 30 sec x 170, iOptron Skyguider Pro

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M101 - 5.9.2021 at 00.30 - 5.9.2021 at 02.30 Järvenpää Observation number 100989