Thus, studies of this object have mostly been conducted in wavelengths other than the optical range.

The absorbing clouds of dust are not uniform, and the extinction coefficient RV is 2.5, less than the typically assumed value of 3.1.

After Terzan 5, it has the highest rate of stellar collisions of any Milky Way globular cluster.

[2] It also has the highest level of emission of gamma rays of any globular cluster.

This may be due to a large number of stellar collisions and pulsars,[5] but it may also be an unrelated background gamma ray source.