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Ursa Astronomical Association

M81 - 21.2.2019 at 21.00 - 21.2.2019 at 23.00 Ulvila Observation number 81533

Visibility IV / V

Tomi Kurri, Porin Karhunvartijat

The new observation stand Losmandy G11 from the Ulvila observatory in Pori Bear Guards is finally ready for operation. In honor of it and as a small test, I decided to take a picture of the M81, or Boden Galaxy.

The pole orientation isn’t quite finished yet, but the minute exposures on the C11 were a pretty easy sausage. When using the autoguider, I was satisfied with partial exposures of up to 4 minutes due to moonlight. The total exposure time was 2 hours.

Also included is a picture of the equipment used. For those interested, there is free admission to Ulvila Observatory every Tuesday from 7 pm!

More similar observations
Additional information
  • Observation target
    • Deep space object
  • Designation
    • M81
    • Näyttävä
  • Constellation
    • Ursa Major
  • 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

Celestron C11 @ f / 6.3, Losmandy G11. Canon EOS 550D. Flat, dark and bias taken. Total 2h exposure time. Image processing DSS, Pixinsight.

Comments: 1 pcs
Juha Ojanperä - 11.3.2019 at 16.17 Report this

Tämä on kyllä todella hieno!

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