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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

IC 1805 - 3.9.2016 at 00.00 Tampere Observation number 56675

Visibility Unclassified

Jouni Raunio, Tampereen Ursa

Opening the season with this tube too when you got the color picture. Pictured is a pile of exposures from two nights totaling just under 10 hours.

Full size image here .

Figures 2 and 3 weather mode during shooting nights.

Figure 4 is the combined pseudoluminance of all channels.

More similar observations
Additional information
  • Observation target
    • Deep space object
  • Designation
    • IC 1805
    • Luokittelematon
  • Constellation
    • Cassiopeia
  • Field of view
  • 2 degrees
  • Weather
    • Kohtalaista tuulta ja kosteata. Kuuton taivas ja revontulia. Ensimmäisenä yönä nopeita matalia irtopilviä.
  • Darkness
    • Average
  • Seeing
    • Average
  • 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

FSQ-106ED + QE 0.73x (f / 3.65) @ NEQ6Pro. Trius SX-694 @ SXUFW + Lodestar OAG + Astrodon 3nm. Seletek Armadillo 2. Integration time total 9h 40min (21 * Ha 19 * S-II 18 * O-III 10min bin1). Image scale 2.41 "/ pixel and original FoV 111 x 89 arcmin.

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