Messier 4 or M4 (also designated NGC 6121) is a globular cluster in the constellation of Scorpius. M4 is a rather loosely concentrated cluster and it is approximately 7,200 light years away, the same distance as NGC 6397, making these the two closest globular clusters to our Solar System!. It has a dwarf star and has been found to be a binary star with a pulsar companion, PSR B1620-26 and a planet... orbiting it with a mass of 2.5 times that of Jupiter!.
Equipment: LX200ACF 12 in. OTA, F6.3, CGE mount, ST2000xm Ccd, AO8, CFW9, Astronomik LRGB filter.