Deepsky - Pieter Vandevelde

Sh2-157 (Sharpless 157) in Cassiopeia

Scope: 10" f/3.8 Newtonian
Mount: Mesu 200 Sitech
Guiding: Lodestar + custom oag
CCD: sbig st8300 @ -18°C
Filter: Astrodon 5nm h-alpha
Exposure: 20h 40m total (20 min subexposures)
2 panel mosaic

Resolution: 1.17 arcsec/pixel

Imaged during 4 nights end of August / early September 2015