H-R+Diagram

media type="custom" key="3130004"HOME, Characteristics, Constellation, H-R Diagram, How Did It Form, CSS Codes This is an H-R diagram that shows Sirius A and B. Sirius a has a luminocity of a bout 10 solar units. Its surface tempature is normally around 8000 kelvin. Sirius B on the other hand has an average temp. around 30000 kelvin. This star is the old grampa to sirius a has been around a while so its luminosity went down to about 10 exponent-2. As seen here sirius B is already a white dwarf and sirius a is heading down the same road. It will run out of hydrogen and will become a red giant and after that ends a white dwarf.