Five molecular clouds are part of the Sh 2-151 complex and have a total of 29 thousand solar masses. About 700 solar masses has been ionised by an unseen star that is likely obscured by dust in one of the molecular clouds. The northern portion of Sh 2-157 (Sim 13, sometimes known as Sh 2-157a) is a ring nebula around the Wolf-Rayet star WR 157, in the Basel 3 star cluster that is in turn part of the Cas OB2 association. The southern portion of Sh 2-157 (Sim 14) may be ionised by stars not belonging to Basel 3. Sh 2-162: is the Bubble nebula, NGC 7635, a circular shell around the O6.5 IIIf star BD +60°2522. The nebula also contains the infrared cluster [BDS2003] 44.
Astrodon Ha 5nm: 15×1200″ bin 1×1
Astrodon OIII 5nm: 9×1200″ bin 1×1
Astrodon SII 5nm: 9×1200″
SPONLI is a project about astrophotography, for amateur astronomers.