Gavin Bent/Kaleb Jordan
SNR G206.9+2.3 is all that remains of a star that exploded in Monoceros about 7,000 light-years away. Arguably overshadowed by neighboring objects like the Rosette Nebula, this object features delicate, nested shells of emission caused by the supernova’s blast wave as it plows through surrounding gas and dust. It spans roughly 50′, larger than the Full Moon. The collaborators combined nearly 45 hours of exposure with 2- and 4-inch refractors, using a combination of narrowband Hα/OIII and one-shot color data.