M 100 Spiral Galaxy

Image aquisition by the Capella Team


clic for 42% size 1498 x 1081 (285 kB)

clic here for 70% size 2496 x 1818 (662 kB)

About this Image

M100 is a classical face-on galaxy, it is showing very well defined spiral arms and displays a very dynamic appearance, appealing by the red and blue knots tracing the arms. The red knots are apparently diffuse gaseous nebulae in which star formation is just taking place, and which are excited to shine by its very hot young stars. The blue regions represent young stellar populations.
Dark dust lanes follow the spiral structure throughout the disk, and may be traced well into the central region to the nucleus.
It shows a similar appearance as the southern galaxy M 83..

The distance to this galaxy measures 60 million light years.
The brighter background galaxies from 12h clockwise are NGC 4328, NGC 4323, PGC 40045, IC 783 situated in a distance of several hundred million light years.
North is to the right.

Compare an ESO image of this galaxy: here.

Bekow you see a crop on the center of the above image in 50/100% size.

clic for 100% size 1130 x 1130 (297 kB)


Technical Details


24 " cassegrain in secondary focus at f/8 (Capella Observatory)

Mount K140 Knopf GEM
Camera SBIG STL-11000M at -25C
Date Apr 25 - May 25, 2009
Location Shinakas/Crete/Greece
Sky Conditions raw FWHM 1.3"
Exposure L:R:G:B = 330:60:75:75 minutes (15-minute sub-exposures); remotely aquired
Credit Stefan Binnewies, Josef Poepsel, Rainer Sparenberg, Johannes Schedler
Programs used Maxim DL 4.5;
Photoshop CS3