"Superluminanse. Integtration of all captured exposures.

IC1795 The North Bear Nebula

Final Version





Bi-Color Ha and OIII

Superluminans, integration of all subframes, Ha OIII and SII



Boren-SImon 8" F3.6

Imaging Camera

Starlight Xpress H9 Mono



Exposures :

38*600 Ha


15*600 OIII


21*600 SII


3*1800 SII


ASA 2" x 0,73 Corrector/Reducer 2KORRR


Astrodon OIII 3nm, Astrodon SII 3nm, Astrodon H-alpha 6nm



IC 1795 is an emission nebula located about 6,000 light-years away in the constellation Cassiopeia . It covers a field of about 20 arc minutes (approximately 70 light-years). Near the Perseus double cluster and nebula Heart, at about 6000 light years from us, this complex extends through the Perseus arm of our Galaxy, the Milky Way. It is easy to see and is located in a rich environment with IC1805 and IC1848, and many open clusters. (WIKI).


IC1795 is nearby to NGC896 (both directly connected), with NGC 896 as one of the brightest nebula condensations of the region. The dominant central star of IC 1795 is a blue dwarf on the main sequence. In addition there are three other stars of class O and B with ages between 3 and 5 million years. This being an age intermediate to the 6 to 20 million years of the shell structure that encloses the complex. The region is one of the sites most studied (besides Orion) for the formation of massive stars. This area is more dense and rich in H II. It is home to, and hides, a group of young blue stars, with their radiation ionizing the residual gas clouds. (WIKI).