M 20 (NGC 6514) Trifid Nebula
The Trifid Nebula (Messier 20 or M20 & NGC 6514) reside within the constellation of Sagittarius. The name Trifid refers to the three lobe appearance of the red emission portion along with a blue reflection nebulosity and an open star cluster. The dark dust lanes (dark nebula is designated Barnards 85. This object shows up well in armature telescopes reviling lots of detail and visible to the naked eye (magnitude 6.3) at dark sky locations. The actual distance is estimated at 4000 light years, although some stars associated with M20 are 2700 to 5700 light years distant. M20 itself is approximately 25 light years in diameter, roughly 15000'xs larger than our solar system. Recent images that go deeper reveal a blue glow around the main red emission portion of the Trifid indicating that some of the reflected nebulosity runs behind and around the red portion. Earlier shots I've taken did not reveal this, but CCD images of a couple hours or more reveal this phenomenon. NASA's Spitzer Space telescope discovered 30 embryonic & 120 newborn stars within the Trifid in 2005.
Telescope / Lens TEC 140 f/7
Mount Type Astrophysics 1200
 Filters Astrodon LRGB e-series of balanced filters (generation 1)
 Film  CCD
 Exposure 150 minutes (2 hours 30 minutes) LRGB (L=75 m (15x5) RGB=25 each, 5 min. subs
 Processing CCDSoft, CCDStack, AIP, Photoshop CS2
 Date  07/19/2009
 Location Snow Peak, S/E of Cottage Grove, Oregon 122° 52' 35" W, 43° 31' 21"N
 Conditions 4658' elevation, magnitude 6 Skies; Clear ; Humidity 65-80% 51 degrees, wind 0-3 M.P.H.

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