Although it’s located moderately far from Earth, HR 5171 can just about be seen on a clear night in the constellation of Centaurus with the naked eye and has been measured to have a magnitude of between 6.10 and 7.30.
So, the title "Monster Hypergiant Star Discovered" is a little exaggerated. "Observations reveal new information about hypergiant star" would be better. Then again, it is the Discovery Channel who put this on their website. Maybe we should just be happy they don't express the size of the star in terms of football fields, and the volume in terms of schoolbuses.