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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

M31 - 30.9.2022 at 22.00 - 30.9.2022 at 22.30 Lohja Observation number 109687

Visibility IV / V

Janne Salomeri, Ursa (Helsinki)

The opening of the autumn star season took place with a 600mm telephoto lens and the target was the Andromeda galaxy M31.

A 600mm telephoto lens would seem to be quite suitable for this object in terms of magnification, as it also accommodates the satellite galaxies M32 and M110.

More similar observations
Additional information
  • Observation target
    • Deep space object
  • Designation
    • M31
  • Weather
    • Tyyni keli, jonkin verran kosteutta ilmassa (järvi vieressä). Linnunrata näkyi kivasti, mutta ei parhaimmalla mahdollisella tavalla. Kuu ei näkyvissä.

  • Darkness
    • Excellent
  • Seeing
    • Good
  • 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

Canon EOS R6, Tamron 150-600mm @600mm, f6.3 JS tripod + camera adapter made of two L-angles, lens heater. 80 x 20s exposures, dark+flat bias. ISO 10000. Stacked with DeepSkyStacker + final cropping of the image with Canon's basic program.

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