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Contact information

Skywarden,
Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki
taivaanvahti(at)ursa.fi

Ursa Astronomical Association

M105, NGC 3384, NGC 3389 - 26.3.2022 at 01.53 Orimattila, Artjärvi, Tähtikallio Observation number 106022

Visibility III / V


This triad of two elliptical galaxies and one spiral galaxy sometimes needs to be re-imaged in better weather. Only four usable exposures were captured by the cell. However, the general appearance of the objects came to the fore.



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Additional information
  • Observation target
    • Deep space object
  • Designation
    • M105, NGC 3384, NGC 3389
  • Constellation
    • Leo
  • Field of view
  • 31 arc minutes
  • Weather
    • Vaihtelevaa pilvisyyttä, Kuu horisontin alla, pakkasta

  • Darkness
    • Good
  • Seeing
    • Good
  • Limiting magnitude
    • 6
  • 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.

    • Elliptic galaxy info

      Elliptic galaxy is an oval or roundish shaped distant stellar system, which have no spiral arms. These galaxies look as fuzzy spots with telescopes.

       

      The elliptic galaxy Centaurus A aka NGC 5128 in the middle of image is splitted by a dust lane. Image Toni Veikkolainen.

Technical information

Alluna RC16, C415 / 3320, Moravian G4-16000 EC Mark II, with filter L 4 x 120 s, 20 x bias, 20 x dark, 10 x flat, 3x binding, image slightly cropped

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