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Nebula (IC 443 / Sharpless 248 (Sh2-248))
(top image is reduced-size | other sizes: medium
, original) Bottom image
is an "Ha-only" view
5,000 light years
||Takahashi FS-60C @ f/6.2
||Takahashi EM200 Temma II
||QSI 540wsg @ -10C
|| Astrodon Ha (3nm), Astrodon Tru-Balance I-Series LRGB Gen
||7x20min Ha, 3x5min L (bin1x1); 3x5min
ea RGB (bin2x2); AstroArt5, CS4 (slightly cropped, 10xdarks/flats/fdarks/bias)
|13 October 2015 - Las Cruces, NM
Published in All About Space magazine, Issue
49, Mar 16, pg 91.
Published in Cosmic
Pursuits, 19 Jan 16.
This image is LHaRGB, where Ha was used in combination with
Luminance and Ha:R (80:20) was used for the Red channel.
Copyright Jeffrey O. Johnson