Sharpless 2-240 / Simeis 147 / Spaghetti Nebula

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Known by several names: Simeis 147, Sharpless 2-240 or the 'Spaghetti Nebula,' this dim but large object is the remnant of a supernova lying between the constellations Auriga and Taurus. The nebula is a filamentary spherical shell of gas that is the remains of a star believed to have exploded some 40,000 years ago. The nebula spans a large swath of sky aproximately 3 degrees across (~ 6x the width of the full moon!), and was captured in this image using a Hydrogen-alpha filter and a four-pane mosaic. This is the second 'sub-mosaic' intended to be part of a larger mosaic across a swath of the constellation Auriga, which is presented in the following image.

 Optics:Stellarvue SV70T w/ reducer 
Camera:ZWO ASI 1600MM cooled CMOS camera 
Mount:iOptron iEQ30 Pro, auto-guided 
Exposure info:600 sec exposures, 4 panel mosaic, 9.5 hours total exposure 
Filters used:Astrodon H-alpha (5 nm) 
date:Feb-March 2017