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OBJECT

NGC 3389 (left of center), and friends                 (image above is reduced-size | other sizes:  medium , large)

Distance:  72 million light years

Telescope TPO 12" Truss-tube RC @ f/6.2
Mount Astro-Physics AP1100GTO (on ATS pier)
Camera QSI 690wsg @ -10C
Filters Astrodon Ha (3nm), Astrodon Tru-Balance I-Series LRGB Gen 2
Guider SX Lodestar
Settings 12x5min L (bin1x1); 2x5min ea RGB (bin2x2); AstroArt5, PI, CS4 (slightly cropped, 10xdarks/flats/fdarks/bias)
Date/Location

Notes
21 May 2025 - Las Cruces, NM

This image is LRGB - note the Luminance contains all of the detail, as shown in my blog. Main target here for me was NGC 3389 (the one with "structure" just left of center)... also shown here is NGC 3384 and just out of the frame is M105 (you can see part of it at the bottom of the frame). NGC 3389 is about 72 million light years away --- and FURTHER way than the other two by roughly 20-30 million light years!

Copyright  Jeffrey O. Johnson

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