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NGC 7635 - Bubble Nebula    (image is reduced-size | other sizes:  medium , original)

Distance:  7,100 to 11,000 light years

Telescope Takahashi TOA-130F @ f/7.7
Mount Takahashi EM200 Temma II
Camera QSI 540wsg @ -15C
Filters Astrodon Ha (3nm), Astrodon Tru-Balance I-Series LRGB Gen 2
Guider SX Lodestar
Settings 12x10min Ha, 3x10min L (bin1x1); 4x5min ea RGB (bin2x2); AstroArt5, CS4 (slightly cropped, 10xdarks/flats/fdarks/bias)

3 September 2017 - Las Cruces, NM

Published as Astronomy Magazine Picture of the Day, 15 Dec 17 (screenshot).
as "100 Most Amazing Space Photos of 2017" (screenshot).
as "Space Image of the Day":
     - 28 Nov 17 slot (screenshot)

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

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