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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

IC 1805, IC 1848 - 24.12.2017 at 20.00 Helsinki Observation number 69206

Visibility IV / V

Juha Parvio, Ursa (Helsinki)

So it has been autumn cloudy to keep every bright evening take advantage of even if it hits Christmas Eve! Well, it was possible to shoot the stars while eating ham and Christmas carols, with the camera and tripod working automatically.

At the same time, the camera was tested when I modified it again a couple of weeks ago. Namely, I also removed another Canon original filter (its outer one) because I suspected it was causing reflections on bright stars along with the Baader filter. Now the reflections are no longer visible, so the suspicion was right and the operation was worth it. The downside is that autofocus no longer works properly, but it doesn't matter in star shooting.

With a picture of heart mist and soul mist, I want to wish everyone a Merry Christmas!

More similar observations
Additional information
  • Observation target
    • Deep space object
  • Designation
    • IC 1805, IC 1848
    • Näyttävä
  • 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

Canon EOS 450D modified, EF 200mm f / 2.8, Star Adventurer tracking stand, Astronomik-UHC, f / 4 aperture mask, 75x120s = 2h 15min, ISO 800, DSS

Comments: 2 pcs
Vesa Vauhkonen - 25.12.2017 at 20.08 Report this

Komeat kuvat. Adventurerilla tosiaan pääsee mukavasti ainakin parin minuutin valotuksiin noilla polttoväleillä, kunhan on kunnolla suunnattu. Itselläni on suuntauksessa apuna:

Oletko kokeillut autoquidausta?

Juha Parvio - 26.12.2017 at 09.27 Report this

Kiitos. Autoguidausta en ole kokeillut, on ollut kyllä mielessä. Täytyisi hankkia sitä varten guidauskamera, eli taas yksi härpäke lisää kuvauskokoonpanoon. Mietityttää, meneekö jo liian monimutkaiseksi. Kuitenkin olisi mukava päästä eroon periodisesta virheestä, jota tässä jalustassa tuntuu olevan. Se kun rajoittaa valotusajat tuohon pariin kolmeen minuuttiin.

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