X48B

X48B is a designation used in astronomy to identify a specific star. It is a red supergiant located in the constellation Cygnus. This star is notable for its immense size and luminosity, placing it among the largest stars known to exist. X48B's diameter is estimated to be hundreds of times that of our Sun, and its luminosity is thousands of times greater.

The star is relatively cool compared to other types of stars, which is characteristic of red supergiants. Its surface temperature is estimated to be around 3,500 Kelvin. Due to its vast distance from Earth, X48B is not visible to the naked eye and requires powerful telescopes for observation. Its classification as a supergiant suggests that it is in a late stage of its stellar evolution, and it is expected to eventually end its life in a supernova explosion. Studying stars like X48B provides valuable insights into the processes of stellar evolution and the ultimate fate of massive stars.