NGC 2403

2021-03-24 / Click on image to enlarge


NGC 2403 is an intermediate spiral galaxy in the constellation Camelopardalis. It is an outlying member of the M81 Group, approximately 8 million light-years distant from Earth and about 50,000 light-years across. The spiral galaxy contains huge star-forming HII regions, characterized by the telltale reddish glow of atomic hydrogen gas. The giant HII regions are energized by clusters of hot, massive stars that explode as bright supernovae at the end of their short and furious lives. NGC 2403 closely resembles another galaxy with an abundance of star forming regions that lies within our own local galaxy group, M33.

Technical Details

LocationZollikerberg, Switzerland
CameraNikon DSLR D810A
TelescopeTS ONTC 12" f/4 Carbon Newton
OpticsTS 2,5" Wynne Coma Corrector
Focal Length1140mm
MountiOptron CEM120 Center-Balanced Equatorial Mount
AutoguidingMGEN-3 (Dithering)
Planetarium SoftwareStellarium
Image Session ControlAPT - Astro Photography Tool v3.86, ASCOM Platform 6
Lights71 x 120s (total 2h22'), ISO-1600, additional Biases, Flats, no Darks
Stacking SoftwarePixinsight 1.8, Drizzle 2x
Image ProcessingPixinsight 1.8