Sh 2-100 consists of two distinct nebulae – K3-50 (W58A) and NGC 6857. 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. Available distance estimates suggests that the W58 molecular cloud is located in the Perseus arm. Sh2-100 is upper left & Sh2-99 is to the left of it.

Telescope: Astro Physics 175EDF f8.3
Mount: Astro Physics 3600GTO “El Capitan”
Camera: SBIG STT8300
Guider: Mini Borg 50 / SBIG STi

L: 62×10 mins = 620 mins, R: 24×10 mins = 240 mins, G: 23×10 mins = 230 mins, B: 26×10 mins = 260 mins

Total Imaging Time: 22h 30m

Data Imaged remotely over 12 nights during May & June 2021.
Data acquisition & Processing by David Churchill.

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