Optics/mount : 12″ACF 2.7m AP-Reduzer Alt-5 Camera/filters: Atik 11002 AstrodonHa/OIII/SII Exposure:4x15x600 Ha / OIII / SII all 2bin 14-17 october 2017 Sh2-157 is a weak emission nebula, but of considerable visible extension in the constellation of Cassiopea; it is located by the arm of Perseo . The northern part of […]
