Sirius has 2 a type stars "the dog star" and "the pupstar" the pup star appears 6800 time fainter than the dog?

Their surface temperatures are about the same: 26,000F. Obviously the fainter one is far smaller. In fact, The Pup, or Sirius B, is the first discovered white dwarf, and is just about the same size as Earth. Sirius A is 2.2 million miles in diameter.