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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

IC 1805 - 3.8.2015 at 01.21 - 3.8.2015 at 02.13 Tampere Observation number 40377

Visibility III / V

Jouni Raunio, Tampereen Ursa

Black heart (Heart Nebula, IC 1805, Sh2-190) or rather black and white. In the midst of all the adjustment, I sacrificed for one hour of filming at the darkest moment of the day. Other channels (O-III and S-II) had not yet been included because the dark did not last long enough.

Photos: main image and annotated .

More similar observations
Additional information
  • Observation target
    • Deep space object
  • Designation
    • IC 1805
    • Keskitaso
  • Constellation
    • Cassiopeia
  • Field of view
  • 2 degrees
  • Weather
    • Pilvetöntä kohteen suunnalla taivasta. Heikkoa tuulta. Lämpötila n. +10C. n. 90% valaistu Kuu samalla puolen taivasta kaukana kohteesta.
  • Darkness
    • Mediocre
  • 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

Takahashi FSQ-106ED + Reducer QE 0.73x (f / 3.65) @ Skywatcher EQ6Pro SynScan + EQDIR. Starlight Xpress Trius SX-694 (setpoint -20C). Astrodon 1.25 "Ha 3nm @ SX USB filter wheel 7x1.25". SX OAG + SX Lodestar autoguider. Focusing Seletek Armadillo 2 and FocusMax. Integration time total 40min (H-alpha 8 * 5min 1x1bin). Description, pulseguiding and dithering MaxIm DL Pro + EQMOD. Image processing PixInsight (Calibration: masterbias, no darkks, masterflat). Image scale 2.41 "/ pixel (original FoV 88.6 x 110.8 arcmin).

Comments: 5 pcs

Syväntaivaan kausi on näköjään aloitettu jälleen upeilla kuvilla :)

Komea ja aikainen aloitus!


Jouni Raunio - 3.8.2015 at 18.43 Report this

Kiitoksia vaan molemmille. Pian se pimeys sinne Oulunkin korkeudelle asti saapuu ja jälleen hieno kausi varmaan JP:ltä odotettavissa.

Janne Kari - 3.8.2015 at 21.51 Report this

Tosi komea kauden aloitus!

Jouni Raunio - 4.8.2015 at 00.38 Report this

Kiitos. Toivottavasti myös kelit suosivat kaikkia tähtiharrastajia tällä kaudella paremmin kuin edellisellä.

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