NGC 6139 explained

NGC 6139
Epoch:	J2000
Class:	II
Constellation:	Scorpius
Dist Pc:	10.1kpc^[1]
Appmag V:	+9.68
Size V:	1.6 x 1.4

NGC 6139 is a globular cluster of the Milky Way in the constellation Scorpius. It is located 3.6kpc from the Galactic Center^[1] (less than half the distance of the Sun from the Galactic Center).

Visibility

The cluster appears visibly small and requires larger +12" aperture telescopes to view the core. Appearing around 1.5 arcmins having a radius of .75 arcmins, despite its rather bright magnitude.

Notes and References

1. Harris . William E. . A Catalog of Parameters for Globular Clusters in the Milky Way (2010 edition). Astronomical Journal . 1996 . 112 . 1487 . 10.1086/118116 .