M 51 - Whirlpool Galaxy

Show astrometry data
M51, the Whirlpool Galaxy, a face-on spiral galaxy in the constellation Canes Venatici, is somewhere around 25 million light years from Earth. It is estimated to be about 35% the size of our own Milky Way. It is believed that the smaller companion galaxy, NGC 5195 (the much fuzzier galaxy to the right), has passed through the Whirlpool twice, helping to create the pronounced spiral structure.
This image was taken remotely with our Planewave 17" telescope in Texas. With the rainy season almost upon us, we will rely on data from the USA for our imaging the next 5 months. The LRGB image comprises 13 hours 20 minutes of exposures.

Data collected at the Dark Sky Observatory Collaborative (DSOC) in Ft. Davis, TX using SC Observatory's remote Planewave CDK 17" f/6.8 scope, in collaboration with:

John Kasianowicz, Josh Balsam, Mike Selby, Dhaval Brahmbhatt, Scott Johnson, Mike Bushell, Rich Johnson

Image processing: Andy Chatman

Object details

Galaxy in Canes Venatici

Right Ascension: 13h 29m 52.7s

Declination: +47° 11′ 43″

Magnitude: 8.4

Moon Age Average: 16.80 days

Moon Phase Average: 30.15 %

Additional images

Imaging Setup


Fort Davis, Texas, USA

Jan 27, 2017, Jan 29, 2017, Jan 30, 2017, Feb 22, 2017, Feb 23, 2017, Mar 5, 2017, Mar 7, 2017, Mar 21, 2017, Mar 22, 2017, Apr 6, 2017, Apr 19, 2017, Apr 23, 2017, Apr 25, 2017 and May 2, 2017
Planewave CDK 17
Focal Length:
2924 mm
Focal Ratio:
Astrophysics 1100GTO
FLI PL 16803
Image Scale:
1.27 arcseconds/pixel
Imaging Software:


Processing Software:

Adobe Photoshop

PixInsight 1.8

Exposure Detail

Filter Filter Brand Bin Qty Exposure
L Astrodon 2x 11 1200
R Astrodon 2x 12 1200
G Astrodon 2x 8 1200
B Astrodon 2x 9 1200

Total Exposure Time

13 hours, 20 minutes

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