Astronomers with European Southern Observatory have found a new Blackhole that is thought to be the closest to the Earth at a distance of 1000 lightyears. The new found Blackhole is part of a triple system called________?

Question

Accepted Answer

HR-6819. B is the correct designation for the triple system associated with the newly found black hole. A refers to a different object or designation. C does not match the known designation for this system. D uses an incorrect combination of letters and numbers.