Object name: BERKELEY029
Berkeley 29 is considered the most distant known open cluster residing nearly 72,000 light-years from our galaxy's core. Most cite a size of 100,000 light-years for the galaxy but it really is much larger as this cluster indicates. It's located in southern Gemini some 50,000 light-years from us. I measure its size at about 3 minutes of arc though defining it is pretty fuzzy at best. That would make it some 40 light-years across. That's pretty large for an open cluster. Apparently, only its great distance makes it looks so compact.