Captured over 31.2 hours of integration, Abell 31 is one of the faintest large planetary nebulae visible from Earth. The image reveals the extended hydrogen shell interacting with the surrounding interstellar medium and the oxygen-rich interior.
Equipment RC10 (254 mm Ritchey-Chrétien)
QSI 660 WSG-8 CCD
Pixel scale: 0.89″/px
Exposure L: 96 × 60s
R/G/B: 32 × 60s each
Ha: 56 × 900s
OIII: 56 × 900s
Total: 31.2 hours
Location Fregenal de la Sierra, Spain
Processing: PixInsight + Photoshop
by kbarth001