Russell Croman Astrophotography  



The Dumbbell Nebula
in Elemental Colors

About This Photograph

This image of the Dumbbell Nebula is presented in false-color. Red, green and blue channels were assigned to Sulphur-II, Hydrogen-alpha and Oxygen-III emission lines, respectively. The H-alpha channel was also used for the luminance data.


Technical Details

Optics:14" f/10 RCOS Ritchey-Chr├ętien Cassegrain at f/10.
Camera:SBIG ST-10XME, CFW8.
Mount:Takahashi NJP Temma 2.
Filters:Custom Scientific 3nm Sulphur-II, H-alpha, Oxygen-III.
Dates/Times:14, 29, 30 July, 3 August 2003.
Location:my backyard observatory in Austin, Texas.
Exposure Details:SII:Ha:OIII = 260:200:140 minutes (20-minute sub-exposures).