Object name: M067
M67 is an open star cluster in Cancer. While it is considered a very old cluster its age is still heavily debated. WEBDA gives an age of 9.3 billion years, nearly the age of the galaxy and more in line with a globular cluster than an open cluster. Others say 3 to 4 billion years for it. Due to its age, it lacks the bright blue stars seen in most open clusters. It seems to contain some A stars which would argue against the WEBDA age as those stars would have long since died though could they just be field stars rather than cluster members. I didn't find motion studies of the stars which should answer such questions. Most sources do agree it is about 3,000 light-years or a bit less distant. WEBDA says 2960 while SEDS says 2700 for example.