IC 1805 - 5.8.2014 at 00.00 - 5.8.2014 at 02.00 Tampere Observation number 28565

Visibility III / V

Jouni Raunio, Tampereen Ursa

IC 1805 (Heart Nebula) in the constellation of Cassiopeia at a distance of 7,500 light-years. The sad wind the night before had prevented everyone from attempting to describe anything from the south to the darkest part of the sky, and tonight the weather type with the direction of the wind was quite similar. The object was therefore selected from the northeastern part of the sky where the echo of the setting and rising of the Sun is still visible through the night. After two o'clock, the exposures began to ruin when the dome and tube had to be turned to the southeast and the wind got to catch the telescope. Color photography was still a dream. Figures 1 and 2 .

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1 0

Additional information

Observation target
- Deep space object
Designation
- IC 1805
- Keskitaso
Constellation
- Cassiopeia
Field of view
1 degrees

Weather
- Trooppinen yö. Ei pilviä. Matalalla oleva puolikas Kuu oli jo ehtinyt laskea. Puuskittaista kaakon suuntaista tuulta 2-5 m/s. Lämpötila +20C paremmalla puolen läpi yön. Taivas koillisenkin suunnalla riittävän tumma vaikka sääkameran kuva näyttää sen valoisempana kuin todellisuudessa. Tuulisuus pakotti lopettamaan valotukset.
Darkness
- Mediocre
Seeing
- Average
Nebulae
- Emission nebula
  
  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

TS PHOTOLINE Triplet APO 102 / 700mm f6.85 @ Skywatcher EQ-6 Pro SynScan + Poseidon POEQ6-USB. Starlight Xpress Trius SX-694 (setpoint -10C). Baader 2 "H-alpha 7nm @ SXUFW 5x2". SX OAG + SX Lodestar autoguider. Focusing FLI PDF. Integration time total 1h 50min. (H-alpha 11 * 10min 1x1bin). Description, pulseguiding and dithering MaxIm DL Pro + EQMOD. Image processing PixInsight (Calibration: masterbias, no darkbacks, 21 * flat). Image scale 1.31 arcsecs / pixel (original FoV 48 x 60 arcmin).

Comments: 2 pcs

Severi Seppälä - 5.8.2014 at 19.36

Ai että nuo mustavalkoiset syväntaivaan kuvat piristävät kyllä työpäivää mukavasti. Upeita kuvia tulee, vaikka ei ole edes kovin pimeää vielä. Näitä lisää!

Jouni Raunio - 5.8.2014 at 20.00

Kiitos. Ole huoleti. Mikäli kelit ja muut seikat sallivat niin kyllä niitä kuvia tälläkin kaudella varmaankin taas iso kasa syntyy,

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IC 1805 - 5.8.2014 at 00.00 - 5.8.2014 at 02.00 Tampere Observation number 28565