Sunday, April 16, 2017

M51 - The Whirlpool Galaxy

Messier 51 (a.k.a. M51, or The Whirlpool Galaxy M51, or NGC 5194), is an interacting spiral galaxy in the constellation Canes Venatici. It was the first galaxy to be classified as a spiral galaxy.  M51 is approximately 23 million light-years from the from Earth but estimates range between 15 and 35 million light-years. Under very dark skies M51 and its companion galaxy, NGC 5195, can be seen with small aperture telescopes and may even be seen with binoculars. I actually saw it at Boothe Park in Stratford, CT with Elliot Severn's 12" dobsonian (lots of light pollution - 7 on the Bortle Scale). I have always been fascinated with images of this object but never dreamed I would actually be able to image it myself (source: wikipedia).

I managed to get almost 2 hours of exposure when it was directly overhead.  This time of year seems to have many galaxies but not much in the way of nebulae.  That's fine with me.  I have been taking 90 second exposures at ISO 1600 for the galaxies and that has been giving me good results.   

This represents the 69th Messier Object I have imaged using a Canon 600D connected to an Orion ED80 f/7.5. I captured this object on Friday evening and since it cleared up the following evening I got a bonus and was able to capture M101.


Wide Field


M51 - The Whirlpool Galaxy
Location: Happy Frog Observatory, Monroe, CT
Date: 4-14-17
Camera: Canon EOS Rebel T3i(a), Backyard EOS
Telescope: Orion ED80 80mm
f/7.5 Apochromatic Refractor Telescope
Barlow: None
Focal Length: 600mm
Focal Reducer: Orion 0.8x Focal Reducer for Refractor Telescopes
Mount: Orion Sirius EQ-G GoTo Telescope Mount
Filter: Astrodon UV/IR
Autoguiding: QHY-5L-II-M attached to an Agena 50mm Guide Scope with Helical Focuser
Exposure: 77 x 90s
ISO: 1600
Temp: 5 C
Post Processing: Deep Sky Stacker, Photoshop, Lightroom, Gradient Exterminator, Astronomy Tools, StarTools.

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