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The Butterfly Nebula in Emission-Line
Type Nebula
Constellation Cygnus
Distance 5,000 ly
More Info
Date 07 Sep 2013 (Summer)
Place Carlsbad, CA
Exposure Data Ha 300 mins @ -20C
Ha 15x20 (bin 2x2)
Notes Image scale of 1.2 arcsec/pix
Optics DSI RC10C Corrected RC Astrograph
Focal Length 1867mm @f/7.3
Mount Astro-Physics 900GTO
Camera QSI 683wsg-8
Focuser Built-in Secondary Focuser
Filters Astrodon 3nm Ha
Software Maxim DL, CCDStack, Photoshop