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The Whirlpool Galaxy
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Click on image for a larger view
The Whirlpool Galaxy
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130 mm f/6.4
Astro-Physics EDF
Refractor
Astro-Physics AP
900GTO
Click here to look at my April 2005 M51 previous attempt
Image labeled
About this Object
The famous Whirlpool galaxy M51 was one of Charles Messier's original discoveries: He discovered it on October 13, 1773,
when observing a comet, and described it as a "very faint nebula, without stars" which is difficult to see.
Its companion, NGC 5195, was discovered on March 21, 1781 by his friend Pierre Méchain.
This galaxy was the first one where the spiral structure was discovered, in spring 1845 by Lord Rosse, who made a very careful and acurate painting.
Therefore, M51 is sometimes referenced as Rosse's Galaxy or Lord Rosse's.
More informations are available at the seds.org website
Technical Data
Optics
Mount
Camera
SBIG
ST-10XE.
Filters
SBIG CFW8A.With
Astrodon LRGB Ha filters
Focuser
Robofocus focuser and
Focusmax
software
Dates
May 2007.
Location
Lentin
Observatory
Exposure
Total exposure 22h30mn:
LRGB = L=632mn bin1,R:230;G:210;B:270minutes. bin2. scale 1.7^s/pixel.
Acquisition
Image data acquired remotely using ACP5 Observatory control software.,
MaxIm DL 4
Processing
MaxIm DL 4,
Photoshop CS2,
Registar,
All content are copyright
Antoine Vergara
