Object
Description:Trifid Nebula and M21 Open Cluster
Type:Diffuse Nebula
Constellation:Sagittarius
Distance:5,200 ly
Image
Date:August 31, 2008
Location:Palomar Mountain, CA
Exposure:R 6x10, G 6x10, B 6x10 (bin 1x1)
Equipment
Optics:Takahashi FSQ-106N Refractor
Focal Length:530mm @f/5
Mount:Astro-Physics 900GTO
Camera:SBIG ST-2000XM
Focuser:Robo-Focus
Filters:CFW10A, Astrodon RGB
Software:CCD Commander, Maxim DL, CCDStack, Photoshop
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