NGC 7000 - 30.4.2023 at 23.51 - 1.5.2023 at 00.57 Janakkala, Tervakoski Observation number 115796

Visibility III / V

Petri Kuossari, Riihimäen tähtit. yhdistys

Labor day or actually the catch of the night. I photographed the objects of the Cygnus constellation with a double narrowband filter. With this filter, you can see the wavelengths of Hydrogen Alpha (H-alpha) and Oxygen III (O-III).

Adjusted the tones of the first image.

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Additional information

Observation target
- Deep space object
Designation
- NGC 7000
Constellation
- Cygnus

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

Vaonis Vespera

394 images

Observation duration 1h 5 min

Exposure 10s

Gain 30db

Filter Dual

CovalENS technology: Yes

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NGC 7000 - 30.4.2023 at 23.51 - 1.5.2023 at 00.57 Janakkala, Tervakoski Observation number 115796