M33 - NGC 598 (Triangulum Galaxy) - H-alpha view    (image is reduced-size | other sizes:  medium , original)

Distance:  3 million light years

Telescope Takahashi TOA-130F @ f/7.7
Mount Takahashi EM200 Temma II
Camera QSI 690wsg @ -15C
Filters Astrodon Ha (3nm), Astrodon Tru-Balance I-Series LRGB Gen 2
Guider SX Lodestar
Settings 11x2min Ha, 9x10min L (bin1x1); 4x5min ea RGB (bin2x2); AstroArt5, CS4 (slightly cropped, 10xdarks/flats/fdarks/bias)

7 November 2018 (LRGB from Dec 2017) - Las Cruces, NM

Published in Astronomical League's quarterly Reflector Magazine, Mar 2019 issue, pg 29 (screenshot).

This image is LHaRGB: Ha data from 7 Nov 2018 combined with LRGB data from 12,15 Dec 2017.

Copyright  Jeffrey O. Johnson

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