Name: NGC891, Caldwell 23
Date: 4 December & 6 December 2013
Exposure: 4:24hr ISO400, 44x 6min with IDAS LPS P2 filter
Telescope: 8" Newton f/3.8 800mm with GPU f/4 coma corrector
Mount: NEQ6-pro, controled by EQmod/CdC, guided by QHY5/9x50 Finder Guider/PHD
Camera: Canon 450D Baader modified,
Location: Prinsenbeek, The Netherlands
NGC 891 is an edge-on unbarred spiral galaxy (actually barred) 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.