NGC3628 Sarah's Galaxy

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2014/03/11 - The Moon was up and almost full when I imaged this object, so the data isn't good. I really need to shoot some new data for this object when the Moon is gone again.

NGC 3628, also known as Sarah's Galaxy, is an unbarred spiral galaxy about 35 million light-years away in the constellation Leo. It was discovered by William Herschel in 1784. It has an approximately 300,000 light-years long tidal tail. NGC 3628 along with M65 and M66 form the famous Leo Triplet, a small group of galaxies. Its most conspicuous feature is the broad and obscuring band of dust located along the outer edge of its spiral arms, effectively transecting the galaxy to our view.


Object information
Name : NGC3628 Sarah's Galaxy
Type : Galaxy
Constellation : Leo
Distance : 300K light-year
Apparent dimensions : 15' × 3'.6
Apparent magnitude : 14.80

Image information
Image date : 2014/03/11, 2014/03/09
Right ascension : 11:20:16.970
Declination : 13°35' 21.40"
Focal length : 1381.57 mm
Focal ratio : f/5.44
Image resolution : 0.806 arcsec/pixel
Field of view : 44' 3.5" x 33' 10.5"
Sky quality : 19 mag/arcsecond2
Sensor temperature : -30°C
Light frames : 15 hours and 15 minutes total exposure time
19x 900 sec. luminance unbinned
14x 0 sec. red unbinned
14x 0 sec. green unbinned
14x 0 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 : 12x luminance unbinned
12x 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