NGC 7129 Nebula Area

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About this Image

NGC 7129 is an open cluster star-forming region in a reflection nebula which about 130 very young stars each less than 1 million years old.
The nebula is rosebud-shaped; the young stars have blown a large, oddly shaped bubble in the molecular cloud that once surrounded them at their birth. The rosy pink color comes from glowing dust grains on the surface of the bubble being heated by the intense light from the young stars within. The ultra-violet and visible light produced by the young stars is absorbed by the surrounding dust grains.
Embedded are small distinct yellow-red areas are Herbig-Haro objects where young new stars are born.

North is to the left.

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Technical Details
Optics

16" cassegrain in corrected secondary focus at f/10

Mount ASA DDM-85XL
Camera SBIG STX16803 at -30C, STX filter wheel
Filters Baader 65x65mm LRGB
Date October 2011
Location Wildon/Austria
Sky Conditions mag 5.5 sky, raw FWHM 1.5-2.2", temperature 5-12 C
Exposure L:R:G:B = 600:120:150:180 minutes (20-minute sub-exposures)
Programs used Autoslew
Maxim DL 5
CCDStack
Photoshop CS5