RCW 54b lies in the direction of (and may be identical to) the HII region / reflection nebula NGC 3503
, surrounding the star cluster Pismis 17
, which includes one B0 V and three B2 V stars.
Gum 34a and Gum 34b are bright filaments in the RCW 54b region..
You can see a close up image of NGC 3503 here
NGC 3503 is associated with the star cluster Pismis 17. [1
Pismis 17 includes one B0 V and three B2 V stars. [2
1. ^ Duronea, N. U., Vasquez, J., Cappa, C. E., et al. (2012). "NGC 3503 and
its molecular environment", Astronomy and Astrophysics, Vol. 537, A149.
2. ^ Pinheiro, M. C., Copetti, M. V. F., & Oliveira, V. A. (2010). "Spectral
classification and distance determination of stars in nine southern
Galactic H II regions", Astronomy and Astrophysics, Vol. 521, A26.