This star formation complex is embedded in the massive W58 radio source and molecular cloud, and is catalogued by Avedisova as SFR 70.29+1.60
. The region also includes Sh 2-99, 5 masers, and numerous additional radio and infrared sources including 7 HII regions.
Sh 2-100 itself consists of two distinct nebulae - K3-50 (W58A)
and NGC 6857
Available distance estimates suggests that the W58 molecular cloud is located in the Perseus arm.
The W58 region can be seen in this MSX infrared image
A major study of this star formation complex appears in a 2010 paper and finds 7 HII regions. [1
Consists of two distinct nebulae - K3-50 and NGC 6857. [2
Sh 2-100 is part of the star formation region W58. [3
1. ^ Samal, M. R., Pandey, A. K., Ojha, D. K., et al. (2010). "A
Multiwavelength Study of Star Formation in the Vicinity of Galactic H II
Region Sh 2-100", The Astrophysical Journal, Vol. 714, 1015-1036.
2. ^ Persson, S. E. & Frogel, J. A. (1974). "Spectrophotometric observations of
the compact H II region K3-50 and of NGC 6857.", The Astrophysical Journal,
Vol. 188, 523-527. [1974ApJ...188..523P]
3. ^ Georgelin, Y. M. & Georgelin, Y. P. (1976). "The spiral structure of our
Galaxy determined from H II regions", Astronomy and Astrophysics, Vol. 49,