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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

IC 1805, IC1848 - 23.9.2019 at 00.00 - 23.9.2019 at 02.30 Rovaniemi Observation number 85777

Visibility V / V

Lauri Turunen, Corona Borealis, Rovaniemi

On the merits of a clear night, I was able to test the new shooting set again. This time I moved the stand from the grass to the hard ground and the tracking improved considerably. That is, the grass gave up so much that the polar sight shifted according to the focus of the shooting head. MGEN worked great until the clouds came to disturb after a couple of hours of exposure. For some reason, the guider did not survive this, but after the clouds disappeared, the shot was not completely sharp for many. Eventually I got 50 piles of 180 second exposures at ISO800. The subject is so bright that this was enough to produce a very satisfactory final result after the basic image processing.

More similar observations
Additional information
  • Observation target
    • Deep space object
  • Designation
    • IC 1805, IC1848
    • Erittäin näyttävä
  • Constellation
    • Cassiopeia
  • Darkness
    • Good
  • Seeing
    • Good
  • 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.

  • Star clusters and asterisms
    • Open cluster info

      Open cluster is an irregular group of tens or hundreds of stars. It can be visible as separate stars or a bit fuzzy spot with small instrument.

      There is the open cluster M52 on the right edge of the image. The red emission nebula is the Bubble Nebula. Image Jyrki Grönroos.


      The open cluster M45 aka Pleyades. Image Juha Parvio.


      The pair of the open clusters NGC 869 and NGC 884 aka the Double Cluster in Perseus. Image Lauri Kangas.


      M34 is also an open cluster in Perseus. Image Teppo Laitinen.


      The Wild Duck Cluster M11 is an exceptional dense open cluster. Image Jaakko Asikainen.



      The Ptolemy's Cluster M7 is located in a rich-star area of The Milky Way in Sagittarius. Image Toni Veikkolainen.

Technical information

William Optics RedCat51, Canon 6Da, Astronomik CLS, iOptron Skyguider Pro, Lacerta MGEN-II, ZWO Mini Guide Scope. Pixinsight, Lightroom

Comments: 3 pcs
Vesa Vauhkonen - 25.9.2019 at 21.54 Report this

Todella hyvä kuva. Löytyykö jostain 'helppoa' opasta Pixinsightin käyttöön? Onko ilmaisohjelma?

Emma Bruus - 26.9.2019 at 00.04 Report this

Hienoa jälkeä ja kiitos myös teknisten vaiheiden/haasteiden jakamisesta sitä tehdessä! :)

Lauri Turunen - 29.9.2019 at 17.46 Report this

Vesalle: Paras opas on Inside Pixinsihgt, ks. linkki. Koskapa olen omani lukenut, niin voin siitä luopua 20 eurolla.


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