Messier 100 (also known as NGC 4321) is an example of a grand design spiral galaxy located within the southern part of constellation Coma Berenices. It is one of the brightest and largest galaxies in the Virgo cluster, located approximately 55 million light-years distant from Earth and has a diameter of 107,000 light years.[wikipedia]
Acquired in trying conditions over two nights from Lake Sonoma,CA on Jan 24,25 2015
Since this target rises above 30 deg only at midnight, I could only get Luminance on one night of good seeing, and then some color data on the following night, when unfortunately the seeing was unsteady and occasional gusts of wind spoiled a couple of subs.
Luminance: 27 x 600s
R,G,B: 9 x 600s each
Total exposure time: ~9 hours
Main Camera: QSI 583 WSG
Guide Camera: SXV Lodestar (on OAG)
Mount: Astro-Physics Mach 1
Scope: Celestron Edge HD 8" (effective FL: 2172mm)
Adaptive Optics Unit: SXV-AO-LF
Image Aquisition software MaximDL
Registed, Calibrated and Stacked and Post Processed with PixInsight 1.8
Description from NASA APOD: M33 is over 50,000 light-years in diameter, third largest in the Local Group of galaxies after the Andromeda Galaxy (M31), and our own Milky Way.
this image nicely shows off M33's blue star clusters and pinkish star forming regions that trace the galaxy's loosely wound spiral arms. In fact, the cavernous NGC 604 is the brightest star forming region, seen here at about the 7 o'clock position from the galaxy center.
I used a rather thin dataset to produce this image - but I've never been a huge fan of M33 as an aesthetic object and I don't feel additional data is going to make me like this any more.
Lum: 13 x 900s
R: 8 x 900s
G: 12 x 900s
B: 11 x 900s
H: 14 x 1800s
total exposure time: 18 hours
Scope: Takahashi FSQ106
Mount: Paramount ME
Camera: QSI 683WSG