Last updated on 10/26/2014


  Hα data 

0bject Sh2-173 Emission nebula in Cassiopeia (NGC 103, Mayer 1)
Date October 29-31, 2012
Exposure HαRGB 720;30:30:30 (cropped)
Camera STL11000M with AstroDon Gen II filters (water-assisted cooling)
Telescope ASA 10N f/3.7 on AP900GTO CP3
Guiding Remote guide head with MiniBorg 50 mm
Processing MaximDL, Photoshop CS5,  AstroActions
Comments Moderate seeing; shot during full moon; acquired with CCD Commander