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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

M51 - 17.10.2021 at 22.00 - 18.10.2021 at 01.00 Järvenpää Observation number 101849

Visibility III / V

Eemil Pietilä, Ursa (Etelä-Suomi)

Described as a vortex shutter with about 3 hours of exposure with the full moon in the sky. Surprisingly, the galaxy appeared. It was good that there weren’t a lot of bright stars around the galaxy, so the halos created by the achromatic telescope didn’t bother me.

More similar observations
Additional information
  • Observation target
    • Deep space object
  • Designation
    • M51
  • Constellation
    • Ursa Major
  • Weather
    • Ilma oli yllättävän kuiva, joten kaluston pinnalle ei päässyt syntymään kosteutta. Näin ollen myös pellon pinta oli sumuton. Välillä kuvauksen keskeytti hetkellisesti kohteen edestä vaeltava pilviryhmä.

  • 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 lens telescope, F400 mm, f / 5.0, Canon EOS 1200D (full Spectrum mod), Optolong UV / IR Cut, ISO 800, 30 sec x 350, iOptron Skyguider Pro

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