The Andromeda Galaxy (M31) in HOO+RGB

Image Title: M31 - The Andromeda Galaxy - 27 hours in HOO+RGB

Copyright: Six Astr

Date image was taken: October 01, 2025

Location: Perros-Guirec, Breizh, France

Data Acquisition Method: Personal Telescope Setup

Description and Details: Here is our neighbor M31 in HOO+RGB. Andromeda is a spiral galaxy located about 2.5 million light-years away, and it's hurtling straight toward us at over 100 km per second. It's thought that it will collide with the Milky Way in about 4 billion years.

This image required over 27 hours of exposures across 7 nights in September. It particularly highlights in red the HII regions, which are star-forming areas rich in hydrogen.

WO RedCat 91 WIFD
ASI 2600MC-Duo
ZWO AM5
163*180s no filter
231*300s Optolong L-Ultimate
Processed with Siril, PixInsight, Photoshop

The high-res version is at https://app.astrobin.com/i/20s2o6

Name: Vincent NEGRIER

Website or Facebook Profile: http://www.facebook.com/six.astrophoto