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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

IC 1805, IC 1848 - 24.1.2020 at 19.00 Vantaa Observation number 87686

Visibility III / V

Juha Parvio, Ursa (Etelä-Suomi)

For a long time I was able to photograph the deep sky. I chose a fog of heart and soul, which was more than two years old since the previous shooting. A small setback came when the camera did not respond to the timer wire release, apparently the wire was broken. I then had to resort to an old simple wire trigger that had to start and stop each exposure manually. I then sat for a couple of hours exposing the pictures, but luckily it was good to follow, over the phone. Finally, I noticed that the lens of the lens was fogged and when I stacked I had to discard half of the pictures, but the good result came out anyway.

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Additional information
  • Observation target
    • Deep space object
  • Designation
    • IC 1805, IC 1848
    • Keskitaso
  • Constellation
    • Cassiopeia
  • Nebulae
    • Emission nebula info

      In an emission nebula the hot stars nearby cause the gas glow. This should not mix with reflection nebula, where the gas is only lit up by nearby stars.

      The appearance of a gas nebula is irregular, and the fainter parts of it need bigger instruments to be visible.


      Emssion nebulae in Cepheus. The bigger part is composed of the nebulae Cederblad 214 (Ced214) and NGC 7822. The lower round nebula is called Sharpless 170 (Sh2-170). Image J-P Metsävainio.


      The Orion nebula. Image Samuli Vuorinen.


      In this 4-degree-field there are emission nebulae Sh2-157, Sh2-158, Sh2-159, Sh2-161 and Sh2-162 (or NGC 7635 aka Bubble Nebula) and open clusters M52 and NGC 7510. Image Juha Kepsu.


      NGC 281 aka Pacman Nebula. The object is in Cassiopeia. Image J-P Metsävainio.


      NGC 896 in Cassiopeia is the tip of Heart Nebula (IC 1805). Image Timo Inkinen.

Technical information

Canon EOS 450D modified, EF 200mm f / 2.8 L, Star Adventurer, Astronomical UHC, f / 4 aperture mask, 26x120s = 52min, ISO 800, DSS, Gimp

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