Yellow "Hypergiant" Star

BIGGEST YELLOW “HYPERGIANT” STAR SPOTTED:

An international team of scientists using the very large telescope Interferometer, in March 2014, announced to have discovered the largest known yellow hyper giant star in our galaxy. The best known example is Rho Cassiopeia. These stars are among the biggest and brightest stars known and are at a stage of their lives when they are unstable and changing rapidly. Due to this instability, these objects also expel materials outwards, forming a large, extended atmosphere around the star.

The newly discovered hyper giant star, named HR 5171A, lies about 12,000 light-years away from Earth and measures more than 1,300 times the diameter of the sun. HR 5171A is one of the 10 largest stars found so far.

It is 50 percent larger than huge Betelgeuse and about 1,000,000 times brighter than the Sun. the hyper giant is part of a double star system, with the second component so close that is in contact with the main star. HR 5171A and its companion, HR 5171B, are so close that they touch and the whole system resembles a gigantic peanut