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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