Technical details: Location / Date: Outside of Kopparberg, Västmanland, Sweden / 2017-March Optics: Orion Optics UK AG12 Mount: 10 Micron GM1000 HPS (Unguided) Camera: Canon EOS 100D (Modded with Baader ACF filter) Exposure: 73 x 240 seconds all shot on ISO 3200 (cumulative exposure time is 4 hours and 52 minutes) Processing: Pixinsight and Photoshop   Image details: NGC 4725 is an intermediate barred spiral galaxy with a prominent ring structure about 40 million light-years away in the constellation Coma Berenices. NGC 4725 is a Seyfert Galaxy, suggesting an active galactic nucleus containing a supermassive black hole. It is the dominant member of the Coma II Subgroup or the NGC 4725 Group (within the larger Coma-Sculptor Group), a small group of galaxies that also includes NGC 4712 and NGC 4747, both at a distance of approximately 200 million light-years. (Information from Wikipedia)