RCW 105 or Gum 51

RCW 105 (also known as Gum 51) is an emission nebula in the constellation Norma, surrounded by small molecular clouds and likely part of the compact OB association R105.

OB associations are groups of young, bright O and B stars—among the hottest types—with B stars ranging from 17,500 to 44,500°F and O stars above 44,500°F. Positioned on the blue end of the light spectrum, these stars are notable for their brightness and youth.

Taken at El Sauce Chile 24”CDK and Moravian C5

Lum-24x600, RGB-36x300 each, Ha, O3, S2 -36x600 each.

Image Processing: Mark Hanson

Data by SWSO Imaging team

 Enjoy,

 Mark

Here is a annotated version from

Alexander Zaytsev