[2] As of 2010, the only members of the cluster that were identified are 8–13 red supergiants—young massive stars undergoing helium burning in their cores.
The cluster is located in the constellation Scutum at the distance of about 20–23 kly (6–7 kpc) from the Sun.
It is likely situated at the intersection of the northern end of the Long Bar of the Milky Way and the inner portion of the Scutum–Centaurus Arm—one of the two major spiral arms.
The observed red supergiants are type II supernova progenitors.
The cluster is heavily obscured and have not been detected in the visible light.