M106 Spiral Galaxy

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2016/04/25 - Messier 106 (also known as NGC 4258) is a spiral galaxy in the constellation Canes Venatici. It was discovered by Pierre Méchain in 1781. M106 is at a distance of about 22 to 25 million light-years away from Earth. It is also a Seyfert II galaxy. Due to x-rays and unusual emission lines detected, it is suspected that part of the galaxy is falling into a supermassive black hole in the center. NGC 4217 is a possible companion galaxy of Messier 106. A Type II supernova was observed in this galaxy in May 2014.


Object information
Name : M106 Spiral Galaxy
Type : Galaxy
Constellation : Canes Venatici
Distance : 23.700K light-year
Apparent dimensions : 18'.6 × 7'.2
Apparent magnitude : 9.10

Image information
Image date : 2016/04/25
Right ascension : 12:19:0.701
Declination : 47°17' 59.65"
Focal length : 1685.89 mm
Focal ratio : f/6.64
Image resolution : 0.661 arcsec/pixel
Field of view : 36' 22.2" x 27' 21.1"
Sky quality : 21.5 mag/arcsecond2
Sensor temperature : -20°C
Light frames : 2 hours total exposure time
8x 900 sec. luminance unbinned
Image acquisition with ACP Observatory Control Software, ACP Scheduler and Maxim DL
Auto-guiding with Maxim DL
Auto-focusing with FocusMax
Bias frames : 100x unbinned
Dark frames : None
Flat frames : 20x luminance unbinned
Automated sky twilight flats with ACP
Processing : PixInsight for calibration, alignment and integration.
Adobe Photoshop CS6 for final touch.

Equipment information
Telescope : Orion Optics 10" ODK
Corrector : None
Focuser : Baader SteelTrack with SteelDrive
Mount : Mesu Mount 200 with Sidereal Technology SiTech Controller
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 : www.sunstarfrance.com, Hautes-Alpes, France