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M104 The Sombrero Galaxy

m104Sombrero40x30Stack01Apr06BiasLog2.jpg (91523 bytes)

M104 Sombrero Galaxy (NGC 4594)

m104 The Sombrero Galaxy

I did it!  My first "real" galaxy.  The LMC and the SMC are just so big and irregular they "don't count", but M1O4? Wow.  This sucker is around 50 million light years away.  It is about 140,000 light years across.  Its mass is nearly 1,000 billion suns.  For a Canon 350D at prime focus of a telescope this is a relatively easy target to capture (once you get it into the field of view - that's the hard part).  The field of view for an LXD-75 SN8 is about 1.6 degrees with the Canon 350D.  A 20 second exposure will produce a bright (but small) image on each frame.  The galaxy has apparent dimensions of 9x4 arcseconds.  The image here was created by stacking several 20 second exposures and is the actual size recorded but cropped out of the full sized frame.  Aligned in MaxDSLR.   Processed in ImageReady.  This image demonstrates why using mirror-lockup is important.  I didn't and you can see the effect if you look closely at the stars in the larger (linked) image.


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