Trifid Nebula

From Wikipedia, the free encyclopedia

"The Trifid Nebula (catalogued as Messier 20 or M20 and as NGC 6514) is an H II region located in Sagittarius. It was discovered by Charles Messier on June 5, 1764. Its name means 'divided into three lobes'. The object is an unusual combination of an open cluster of stars; an emission nebula (the lower, red portion), a reflection nebula (the upper, blue portion) and a dark nebula (the apparent 'gaps' within the emission nebula that cause the trifurcated appearance; these are also designated Barnard 85). Viewed through a small telescope, the Trifid Nebula is a bright and peculiar object, and is thus a perennial favorite of amateur astronomers.

The Trifid Nebula is a star-forming region in the Scutum spiral arm of the Milky Way. The most massive star that has formed in this region is HD 164492A, an O7.5III star with a mass more than 20 times the mass of the Sun. This star is surrounded by a cluster of approximately 3100 young stars."

Date :  July 2011
Location : Backridge Observatory, Spruce Knob, West Virginia

Equipment used :
 Lens or telescope -- Homemade 16" Newtonian with MPCC
 Mount -- AP 1200
 Camera -- QSI 583wsg with Lodestar  guider

Acquistion Software : ACP, MaxIm DL, Focusmax
Processing Software : MaxIm, DL, Photoshop

Exposure Detail : LRGB combine   Total hours  2.5