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Contact information

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

Ursa Astronomical Association

NGC 6992 Itäinen harsosumu - 22.10.2014 at 21.00 Oulu Observation number 31335

Visibility III / V

Jaakko Asikainen, Oulun Arktos

The first item of the evening during which I noticed the filter wheel trick. In later tests, the bike again worked flawlessly controlled through the camera, I suspect the temperature brought out the fault.

The whole gauze mist would basically fit in the image field of the lens tube, but the problems with edge distortion must be solved first.

http://www.astrobin.com/131319/



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Additional information
  • Observation target
    • Deep space object
  • Designation
    • NGC 6992 Itäinen harsosumu
    • Keskitaso
  • Constellation
    • Cygnus
  • 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.

Technical information

420 / 70mm APO, QHY9m, NEQ6, Baader LRGB filters. 10x3min luminance, 5x2min colors

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