Best of AOP - Galaxies

IC 239

At a distance of 30-40 million light years IC 239 is not terribly distant. However, its low (surface) brightness may indicate that this galaxy isn't as massive as many others of the same type (M101 for example). The bright foreground stars of our own galaxy make detecting the delicate structure of this face-on spiral a difficult venture. There are hints of bluish spiral arms with a myriad of pink nebulae (star forming regions). If we lived in this galaxy, our sun would orbit the galactic center at a speed of 280km/s. This is a bit faster than our speed in the Milky Way at around 220km/s.

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Last Updated: 19-Feb-2014

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About This Image

Click on image for larger version.

Equipment

20in RC Optical Systems telescope Operating at f/8.1

Paramount ME Robotic Telescope Mount

SBIG ST10XME CCD camera with color filter wheel

LRGB color production was used to create this image.

Needless to say, the 8th magnitude star in this field was very difficult to deal with during processing. Significant

internal reflections can still be seen.

Digital Development (DDP) via Maxim/DL was also used in order to display the very dim and very bright details of

the image simultaneously.

Luminance = 120 minutes binned 1x1

Red = 20 minutes binned 2x2

Green = 20 minutes binned 2x2

Blue = 20 minutes binned 2x2

Minimum credit line: Sharon Kempton and Karen Brister/Adam Block/NOAO/AURA/NSF