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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

IC 1805 - 13.9.2015 at 01.00 Mikkeli Observation number 43218

Visibility III / V

Supplement to previous IC1805 Heart Nebula observation. That is, the SII narrowband exposure from the next night (Astronomik CCD-SII) was added to the image for 6 x 1200 seconds and the combined B and G color channels. The end result in the Hubble palette.

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

RGB 26x10 min, 30 Flat, 16 Dark, R (SII) 6x20min, 30 Flat, 5 Dark MaximDL, PixInsight. TS PHOTOLINE 102mm f / 5.5 Flatfield APO, Canon 5D Mark II, Astronomical CLS-CCD Clip Filter, Astronomical SII-CCD Clip Filter, Guiding System: 70mm f / 7 Refractor + Skywatcher, SynGuider, Mount: Celestron AVX

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