Object name: NGC6960
NGC 6960 is part of the Cygnus Loop. The loop is a shock wave created by a supernova thousands of years ago. For such a well-known object you'd think we'd have a good idea of its age, size, and distance. Maybe we do or maybe not. When I first got into astronomy in the early 1950s it was thought to be some 100,000 years old. Over the years it has gotten younger and younger. Latest estimates put its age at only 8,000 to 10,000 years. As it got younger it got smaller. It was thought to be over 1000 light-years across when I first read about it over 60 years ago. Now it is down to 90 light-years across. Maybe we should call it the incredibly shrinking nebula. With the reduction in size and age, it has gotten closer and closer. The latest distance I found was just under 1500 light-years.