Monday, Oct 14, 2024

In an area of ​​the Cygnus constellation just west of Deneb, dominated by strong Ha emission in the background, making a characteristic three-dimensional effect, is this weak and beautiful SNR (also known as G82.2+5.3, CTB88 or W63) emitting in the optical range mainly in Oiii, even some Ha filaments are visible. It is believed to have been the result of a SN between 14,000 and 21,000 years ago. It has a perspective size of about 86' x 65' and real dimensions of about 150 light years in diameter. Its filaments expand at a speed ranging between 35 and 70 km/s. The SNR is about 5,000 light years away.