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Ursa Astronomical Association

M99 - 30.3.2023 at 22.50 - 30.3.2023 at 22.35 Janakkala, Tervakoski Observation number 113952

Visibility III / V

Kuossari Petri, Riihimäen tähtit. yhdistys

The night went by three tubes, exoplanet observation with eVscope, Messier objects with Vesper and testing with Dwarf II tube. The northern lights were also in the sky for about 20 minutes saying hello. In this picture, M99 captured on Vespera.

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Additional information
  • Observation target
    • Deep space object
  • Designation
    • M99
  • Constellation
    • Coma Berenices
  • Darkness
    • Average
  • 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

Date of capture: 29/03/2023

Location: Tervakoski, Finland

Station: Vespera

Object name: M99

Exposure time: 258x10s (43 min)

Filters used: None

CovalENS technology: No

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