M33 (Pinwheel Galaxy)

All Images Copyright Steve Cannistra

Please click here for a medium sized view (40%)
Please click here for a larger sized view (60%)

RA: 01h 33m 52s
Dec: +30 degrees 39' 29"
PA: plus 285 degrees

M33 is a beautiful, large, and yet relatively faint spiral galaxy member of our local group.   Although its magnitude is 7.0, it has low surface brightness due to its large extent (over 1 degree).  The most conspicuous characteristic of M33 is the large number of HII star forming regions it contains, seen as red regions of Ha emission within the spiral arms.  One of these HII regions, known as NGC 604, is seen at about 7 o'clock in the above image and extends for over 1,500 light years.  More information about M33 may be found in Rob Gendler's website.

Photographic Details:
Date:  October 9 and 10, 2010
Scope:  Vixen VC200L at f6.4 on the Takahashi NJP Mount
Autoguider:  SBIG ST-402
Camera:  ST8300 -20C

Baader L, R, G, B filters
Exposures:  Lum = 390' ; R = 180'; G = 90'; B = 120'. Total exposure 13 hours
Post-processing:  Calibrated in Maxim, aligned and stacked using DeepSkyStacker, followed by DDP in ImagesPlus (IP).  Further processing in Photoshop CS5. 

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