M 57, Ring Nebula

Technical data:    This image was done in cooperation with the Capella-Obseratory team and using their 24"f/8-Cassegrain telescope located in Crete/Greece

                           SBIG STL11000 with Custom Scientific-Filterset

                           L(RHa)(GOIII)(BOIII) exposure times in total (L=9x900s; R=4x900s; G=4x900s; B=4x900s; Ha 7x900s, OIII 12x900s all unbinned)

                           Authors: Volker Wendel, Stefan Binnewies, Josef Pöpsel

Technical data:    12"f/20-Schiefspiegler and 15"f/8 newtonian for luminance data, same newtonian for color channels

                           SBIG ST10XME, CFW8 and AO7

                           LRGB = 8x900s with the Schiefspiegler and 3x900s with the 15" newtonian

                                         R=3x600s; G=3x600s; B=3x600s; color channels bin 2)

                           Comments: FWHM 1,65-1,8", the fainter double star above the Ring has a distance of 1,8" between the two stars

                           Author: Bernd Flach-Wilken and Volker Wendel

HOME    GALAXIES    GALACTIC NEBULA    PLANETARY NEBULA    STAR CLUSTERS    SOLAR SYSTEM    WIDEFIELDS