Sh2-170, Little Rosette Nebula

2021-10-10 / Click on image to enlarge


Sh2-170, also known as Little Rosette Nebula, is a small emission nebula with an embedded cluster of stars in the constellation Cassiopeia. It lies in the Perseus arm of our galaxy around 7.500 light-years distant. At its centre is a small, young star cluster. The bright star at the centre of the nebula is ionizing the surrounding hydrogen gas and causing the nebula to glow.

Technical Details

LocationZollikerberg, Switzerland
CameraNikon DSLR D810A
TelescopeTS ONTC 12" f/4 Carbon Newton
OpticsTS 2,5" Wynne Coma Corrector
Focal Length1113mm
MountiOptron CEM120 Center-Balanced Equatorial Mount
AutoguidingMGEN-3 (Dithering)
Planetarium SoftwareStellarium
Image Session ControlAPT - Astro Photography Tool v3.88, ASCOM Platform 6
Lights97 x 120s (total 3h14'), ISO-1600, additional Biases, Flats, no Darks
Stacking SoftwarePixinsight 1.8, Drizzle 2x
Image ProcessingPixinsight 1.8