NGC 7129 / IC 5134
Image down sampled 0.5x, click on above for full size image
Cepheus
Penryn, California
July 2008
M 250 @ f 9.3 (ag, ST-4)
ST-10XME LRGB 10 minute subs
IC 5134 is the designation for the reflection nebulae associated with the open cluster NGC 7129.
IC 5134 is an active star forming region with many Herbig-Haro objects, T-Tauri
and spectral line emission stars.
The bright star to the upper left is Lkh-alpha 234, a spectral line emission
star shining brightly in h-alpha wavelengths. It is this star that gives
the nebula it slightly pink cast.
The red band along the lower right is due to
photodissociation of H2 by the interstellar UV radiation, excited by
Lkh-alpha 234.
Some of the youngest stars and many circumstellar disks
have been discovered in this nebula.
