Russell Croman Astrophotography  



The Swan Nebula
in Hydrogen-alpha

About This Photograph

The Swan Nebula is a star-forming region in the Milky Way, in the constellation of Sagittarius. In this image, a special filter was used to isolate only the light of energized hydrogen atoms, which glow under the illumination of newborn stars within the nebula. The gas is also being forced away from the stars and running into other clouds of dust and gas in surrounding space. This causes the numerous mountainous-looking ridges, known as ionization fronts, seen throughout the image.


Technical Details

Optics:14" f/10 RCOS Ritchey-Chr├ętien Cassegrain
Camera:SBIG ST-10XME, CFW8.
Mount:Takahashi NJP Temma 2.
Filters:Custom Scientific 3nm H-alpha.
Dates/Times:16 & 17 June 2003.
Location:my backyard observatory in Austin, Texas.
Exposure Details:140 minutes (20-minute sub-exposures).


Publication Data for this Photograph

Date Publication Type
2006-11-00 The NewAstro Zone System for Astro Imaging,
p. 218