English: This chart shows the location of the HR 6819 triple system, which includes as of May 2020 the closest black hole to Earth, in the southern constellation of Telescopium. This map shows most of the stars visible to the unaided eye under good conditions and the triple star system HR 6819 is marked with a red circle. While the black hole itself is invisible, the other two stars in HR 6819 can be viewed from the southern hemisphere on a dark, clear night by unaided eyes without binoculars or a telescope.