NGC3184 Galaxy

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2014/03/07 - I spent two nights on this galaxy. It wasn't the best data, because of an interfering Moon and passing clouds. FWHM was between 2.08" and 3.57".

NGC 3184 is a spiral galaxy approximately 40 million light-years away in the constellation Ursa Major. It has two HII regions named NGC 3180 and NGC 3181. NGC 3184 is notable for its high abundance of heavy elements and (SN 1999gi) that was a magnitude 14 Type II supernova detected on December 9, 1999. Other supernovae in NGC 3184 include 1921B (mag 13.5), 1921C (mag 11) and 1937F (mag 13.5).


Object information
Name : NGC3184 Galaxy
Type : Galaxy
Constellation : Ursa Major
Distance : 40M light-year
Apparent dimensions : 7.4' x 6.9'
Apparent magnitude : 10.40

Image information
Image date : 2014/03/07, 2014/03/06
Right ascension : 10:17:47.882
Declination : 41°23' 57.02"
Focal length : 1381.65 mm
Focal ratio : f/5.44
Image resolution : 0.806 arcsec/pixel
Field of view : 33' 25.7" x 25' 4.3"
Sky quality : 19.46 mag/arcsecond2
Sensor temperature : -30°C
Light frames : 15 hours and 30 minutes total exposure time
26x 900 sec. luminance unbinned
14x 900 sec. red unbinned
10x 900 sec. green unbinned
12x 900 sec. blue 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 : 24x luminance unbinned
24x RGB unbinned
Automated sky twilight flats with CCDAutoPilot
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