This is a 4 panel mosaic shot over 6 nights (28 Nov to
4 Dec 2016).
42 hours of data (Ha = 43x20m / OIII = 54x20m /
SII=42x20m) with a William Optics ZenithStar 66
refractor, a Moravian CCD cameras G2-8300 with
Astrodon 5nm filters.
Simeis 147 is a supernova remnant in the Milky Way,
straddling the border between the constellations
Auriga and Taurus at a distance of 1000 to 3000