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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

IC 1805 - 5.8.2018 at 01.00 - 5.8.2018 at 06.00 Fregenal de la Sierra, Espanja Observation number 76498

Visibility I / V

Aarni Vuori, Kirkkonummen komeetta

At the edges of the Portuguese heat wave, our thermometer showed 55 C degrees at its best (or worst). Even at night, the sky temperature was about 7 degrees warmer than normal, and seeing was more or less bad. The sky was covered with a thin thin gauze of moisture. I still couldn’t bear not to shoot, and especially I didn’t mind not editing the image on my laptop in the mood of a holiday trip.

More similar observations
Additional information
  • Observation target
    • Deep space object
  • Designation
    • IC 1805
    • Erittäin heikosti näkyvä
  • 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.

  • Star clusters and asterisms
    • Open cluster info

      Open cluster is an irregular group of tens or hundreds of stars. It can be visible as separate stars or a bit fuzzy spot with small instrument.

      There is the open cluster M52 on the right edge of the image. The red emission nebula is the Bubble Nebula. Image Jyrki Grönroos.


      The open cluster M45 aka Pleyades. Image Juha Parvio.


      The pair of the open clusters NGC 869 and NGC 884 aka the Double Cluster in Perseus. Image Lauri Kangas.


      M34 is also an open cluster in Perseus. Image Teppo Laitinen.


      The Wild Duck Cluster M11 is an exceptional dense open cluster. Image Jaakko Asikainen.



      The Ptolemy's Cluster M7 is located in a rich-star area of The Milky Way in Sagittarius. Image Toni Veikkolainen.

Technical information

Esprit 100ED X 0.75 redu, ATIK 460EXm, Astrodonite, 10Micron1000GM, Ha 19 X 10 min + SII 19 X 10 min + OIII 10 X 10 min

Comments: 2 pcs
Rauno Päivinen - 15.8.2018 at 09.03 Report this

Upea kuva jossa on hieno värimaailma

Aarni Vuori - 21.8.2018 at 22.56 Report this

Kiitos Rauno!

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