Cederblad 214

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2013/10/02 - After a long break I spent 2 nights on this nubula. I had to setup my equipment again. So after a quick polar alignment I made a small pointingmodel and I could start imaging. Ran two automated sessions on this object with narrowband filters. I shot some extra RGB data to correct starcolors. Seeing was around 2.5" FWHM. The night sky is becoming darker again with a SQM 19.7 sky.

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 45000 K and a luminosity ~100000 times that of the Sun. The star is one of the primary sources illuminating the nebula and shaping the complex's famed pillars of creation-type formations, the elephant trunks.

Object information
Name : Cederblad 214
Type : Nebula
Constellation : Cepheus
Apparent dimensions : 16' x 14'

Image information
Image date : 2013/10/02, 2013/10/01
Right ascension : 0:3:51.000
Declination : 67°14' 8.00"
Focal length : 1381.60 mm
Focal ratio : f/5.44
Image resolution : 0.806 arcsec/pixel
Field of view : 44' 41.4" x 33' 38.7"
Sky quality : 19.77 mag/arcsecond2
Sensor temperature : -25°C
Light frames : 13 hours, 55 minutes total exposure time
5x 60 sec. RGB unbinned
14x 1200 sec. hydrogen-α unbinned
14x 1200 sec. oxygen-III unbinned
13x 1200 sec. sulfur-II unbinned
Image acquisition with CCDAutoPilot and Maxim DL
Auto-guiding with Maxim DL
Auto-focusing with FocusMax
Bias frames : 100x unbinned
Dark frames : None
Flat frames : 12x RGB unbinned
12x hydrogen-α unbinned
12x oxygen-III unbinned
12x sulfur-II unbinned
Processing : PixInsight for calibration, alignment and integration.
Adobe Photoshop CS6 for final touch.

Equipment information
Telescope : Robtics 10" 2000mm f/8 Ritchey Chretien
Corrector : Astro-Physics CCDT67 Focal Reducer
Focuser : Moonlite CS Ritchey Chretien focuser with high resolution stepper motor
Mount : ASA DDM60 Pro direct drive german equatorial mount controlled with AutoSlew
Camera : QSI 683wsg-8 cooled CCD camera with Kodak KAF-8300 sensor and Off Axis Guide (OAG) port
Guidecamera : Starlight Xpress Lodestar autoguider
Filters : Astrodon Tru-Balance E-Series LRGB & Astrodon 3nm H-α, 3nm O-III, 3nm S-II and 3nm N-II
Observatory site : Etten-Leur, The Netherlands