Contact information

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

Ursa Astronomical Association

IC 1795, IC 1805 - 2.10.2021 at 20.42 - 3.10.2021 at 03.01 Helsinki Observation number 101760

Visibility IV / V

Tero Hiekkalinna, Ursa (Helsinki)

Part of the Heart Nebula (IC 1805) and the Fishhead Nebula (IC 1795, bottom right), located in the constellation Cassiopeia about 7,500 light-years from Earth. I photographed this with an Optolong L-eXtreme narrowband filter and processed the second image in a way that mimics the color scheme of the famous Hubble Space Telescope. Exposure for exactly 3 hours.



More similar observations
Additional information
  • Observation target
    • Deep space object
  • Designation
    • IC 1795, IC 1805
  • 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

Stand: iOptron CEM60
Imaging tube and camera: Sky-Watcher 80ED pro-series + ZWO ASI071MC Pro
Tracking tube and camera: Orion ShortTube 80mm + ZWO ASI120MM mini
Polar Orientation Tube and Camera: Celestron 9 × 50 Viewfinder Telescope + ZWO ASI224MC (Polar Orientation with SharpCap Pro Software)
Sky camera: ZWO ASI120MC
Engine focus: ZWO EAF
As imaging software I use: NINA - Nighttime Imaging 'N' Astronomy 1.11, PHD2 and Cartes du Ciel.
Image calibration, stacking and processing: PixInsight 1.8

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