PanSTARRS - March 19, 2013 With Gradient Removed
Stack of 15 ten second exposures. JPEGs stacked with Sigma-Median algorithm in IRIS freeware. Background subtracted using polynomial gradient tool in IRIS as well. Final processing in Paint Shop Pro. Pentax K-R camera at ISO 800. CGEM mount, unguided but tracked, with 80mm doublet refractor. Cropped to an EFL of about 800mm. The faintest stars (such as the very faint one immediately to the right of the coma) are magnitude 10.5.
PanSTARRS - March 19, 2013 With Gradient Removed
Stack of 15 ten second exposures. JPEGs stacked with Sigma-Median algorithm in IRIS freeware. Background subtracted using polynomial gradient tool in IRIS as well. Final processing in Paint Shop Pro. Pentax K-R camera at ISO 800. CGEM mount, unguided but tracked, with 80mm doublet refractor. Cropped to an EFL of about 800mm. The faintest stars (such as the very faint one immediately to the right of the coma) are magnitude 10.5.