Tags: Star.
HD 157661 is the Henry Draper Catalogue designation for a likely triple star in the southern constellation of Ara. With a measured annual parallax of 5.13 mas is located at a distance of approximately 640 light-years (200 parsecs) from Earth. The combined apparent visual magnitude of the stars is 5.29 which means it is faintly visible to the naked eye.The inner components of this system consist of a pair of B-type main sequence stars.