CED 214 / NGC 7822
Emission Nebula
NGC 7822 is a young star forming complex in the constellation of Cepheus. The complex encompasses the emission region designated Sharpless 171, and the young cluster of stars named Berkeley 59. The complex is believed to be some 800–1000 pc distant, with the younger components aged no more than a few million years. The complex also includes one of the hottest stars discovered within 1 kpc of the Sun, namely BD+66 1673, which is an eclipsing binary system consisting of an O5V that exhibits a surface temperature of nearly 45,000 K and a luminosity about 100,000 times that of the Sun.

In order to bring out as many details as possible, I decided to use the false color technique, that got famous by the pictures of the Hubble Space Telescopes. The "real" colors are assigned to other colors: sulfur (Sii) = red, hydrogen (h) = green, oxygen (o) = blue. This results in an increase in contrast, and more details become visible.

Nominated for Top Pick on Astrobin

Image Details
Date
September 7, 9, 10, 2023
LOCATion
Hannover (Germany)
Sky Quality
Bortle 5
Telescope
Celestron RASA 8 (203/400 f/2)
Mount
Skywatcher EQ6-R Pro
Main Camera
TS 2600 MP
Gain 100, Offset 200, -10°
Focuser
Celestron Motorfocus
Processing
Astropixelprocessor, Photoshop, Pixinsight
Filter
Baader H-Alpha Highspeed 3.5nm
Baader O-III Highspeed 4nm
Baader S-II Highspeed 4nm
Exposure
Ha: 178 × 120″ (5h 56′)
OIII: 174 ×120″ (5h 48′)
SII: 176 × 120″ (5h 52′)
Total: 17h 36′
Guiding
ZWO ASI 120MM, PHD2
Calibration
Flats, Darks, Darkflats
Software
N.I.N.A., EQMod
Other
Artesky Filter Holder
  
  
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