NGC2903 Barred Spiral Galaxy

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2013/02/20 - Image is shot while the Moon was shining bright.

NGC 2903 is a barred spiral galaxy about 30 million light-years away in the constellation Leo. It was discovered by William Herschel who cataloged it on November 16, 1784. NGC 2905 is a bright star cloud within this galaxy.

Object information
Name : NGC2903 Barred Spiral Galaxy
Type : Galaxy
Constellation : Leo
Distance : 30.600K light-year
Apparent dimensions : 12.6' x 6.0'
Apparent magnitude : 9.70

Image information
Image date : 2013/02/20
Right ascension : 9:32:9.922
Declination : 21°30' 0.06"
Focal length : 1381.12 mm
Focal ratio : f/5.44
Image resolution : 0.806 arcsec/pixel
Field of view : 44' 23.8" x 33' 21.7"
Sensor temperature : -25°C
Light frames : 6 hours total exposure time
12x 600 sec. luminace unbinned
8x 600 sec. RGB 2x2 binned
Image acquisition with CCDAutoPilot and Maxim DL
Auto-guiding with Maxim DL
Bias frames : 100x unbinned
Dark frames : No darks
Flat frames : 5x luminance unbinned
5x RGB 2x2 binned
Created with Gerd Neumann Aurora flatfield panel
Processing : PixInsight for calibration (bias frames and flat frames), 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