M16 - 17.4.2021 at 03.30 - 17.4.2021 at 04.00 Janakkala, Tervakoski Observation number 97817

Visibility I / V

Petri Kuossari, Riihimäen tähtit. yhdistys

The M16 eagle mist was quite challenging to observe, on a low horizon where light pollution and dark times end at four. With half an hour of exposure, I’m relatively happy.

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Additional information

Observation target
- Deep space object
Designation
- M16
Constellation
- Serpens
Darkness
- Mediocre

Seeing
- Mediocre
Nebulae
- Emission nebula
  
  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

eVscope Exposure 30min Noise removed with Adobe Photoshop

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M16 - 17.4.2021 at 03.30 - 17.4.2021 at 04.00 Janakkala, Tervakoski Observation number 97817