RCW 58: A Shell Around WR 4

Image Title: RCW 58

Copyright: Navick-Bozon

Date image was taken: June 19, 2025

Location: Obstech-El Sauce Chile

Data Acquisition Method: Personal Telescope Setup

Description and Details: RCW 58 results from the intense ejection of matter by a massive star. RCW 58 is the Wolf-Rayet star WR 40, the blue star in the center of the image. These stars are generally very massive, from 20 to over 60 solar masses, and very hot (3000 to 200000K). Their nature has two consequences: they eject matter at a rapid rate, and their lifespan is short (5 to 20 million years). Very often, they end up exploding as supernovas. In many cases, the ejection of O3 gas precedes the Ha emission, as shown in the photo.
Set-up Telecope CDK 14 on Mathis Mi500/750 mount
Camera ZWO ASI 6200MM.
156 hours in HOOrvb
PixInsight-Photoshop processing

Name: Cecil Navick

Website or Facebook Profile: http://astroaro.fr