AAPOD2 Image Archives
Collinder 399 - The Coathanger Cluste
A striking capture of Collinder 399—the Coathanger Cluster—standing out against the rich background of the Milky Way, showcasing vivid star colors taken from Buttwil, Switzerland. Though long thought to be an open cluster, modern astrometry reveals it is an chance alignment—an asterism—of ten main stars ranging from 230 to 1,300 light-years away. Its distinctive coat-hanger shape remains one of the northern sky's most delightful binocular targets.