NGC 891 (also known as Caldwell 23, the Silver Sliver Galaxy) is an edge-on unbarred spiral galaxy about 30 million light-years away in the constellation Andromeda. It was discovered by William Herschel on October 6, 1784. The galaxy is a member of the NGC 1023 group of galaxies in the Local Supercluster.
L : 600×1min (10h) / R : 102x1min / G : 102 x 1min / B: 101x1min – Total : 15h05. October 10-12, 2023
Telescope Newton 250 f/4 Axis instruments / Corrector Televue Paracorr 2 / Filters: Antlia V-pro 36mm / Camera: ZWO ASI2600MM Pro / Mount: AP1100 / Location : AstroARO Observatory, Portugal
Softwares : Nina / APP / Pixinsight / Photoshop