Rirhath
A giant type O2 star of the Sagittarius Arm of the Milky Way galaxy. View of this star is occluded from Earth due to intragalactic dust; if it was visible it would appear close to phi Sagittarii.
This large, hot blue-white star is something of a standout in its neighborhood due to not being a variable. It lies within an open cluster that contains nearly two hundred very short-period variable stars of the delta Scuti, delta Cephei, Be, and LL Lyrae types, with the LLs predominating. Some of the stars have periods as short as hours or even minutes. Though stars of this sort cannot usually support worlds where life can arise, they do make for an astonishingly beautiful view from this system; so that this region of space would be a draw for intragalactic tourists even if Rirhath was not also the primary of Rirhath B, q.v.
Rirhath itself is stable: the Rirhait species originated on the sixth planet, and still maintains its relationship with its homeworld, although the species has undergone several diaspora phases in recent millennia. Presently there are many more Rirhait domiciled on other planets than presently live on Rirhath B. (HW et al.)