| NGC6888 |
The following photo is of the planetary nebula NGC6888 (Sh-105), also called the "Cresent" nebula,
located about 5KLyr away in the constellation Cygnus. The nebula surrounds the Wolf-Rayet star,
WR136 (HD192163),and is caused by the high rate stellar winds eminating from the star.
The photo (~1deg X 0.75deg) was taken with the H9 plus TV FL/RD on the 80ED at f/6, in August 2009. It
consists of 2 1/2 hrs of 8min LUM exposures, 2 hrs of 15min Ha exposures, and 1hr each of RGB
exposures (8min R,G; 10min B), combined as (LRHa)(RHa,G,B) using MaximDL and Photoshop
located about 5KLyr away in the constellation Cygnus. The nebula surrounds the Wolf-Rayet star,
WR136 (HD192163),and is caused by the high rate stellar winds eminating from the star.
The photo (~1deg X 0.75deg) was taken with the H9 plus TV FL/RD on the 80ED at f/6, in August 2009. It
consists of 2 1/2 hrs of 8min LUM exposures, 2 hrs of 15min Ha exposures, and 1hr each of RGB
exposures (8min R,G; 10min B), combined as (LRHa)(RHa,G,B) using MaximDL and Photoshop