The Trifid Nebula (catalogued as Messier 20 or M20 and as NGC 6514) is an H II region located in Sagittarius. 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 trifid 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 images was taken at Ft. Griffin state historical site on August 5, 2013. The images is made up of 20 five minute sub-frames. Images were taken with an Orion Star Shoot DSI II color mounted on a Celestron 6" f5 Newtonian. Auto-guiding was accomplished with and 80mm f7 refractor piggybacked on the 6" Newtonian. The optical instruments were mounted on a Celestron CI-700. Calibration and pre-processing was done in Nebulosity 3. Final processing was done using Photoshop CS5.
No comments:
Post a Comment