0.0006 L ☉
BPM 37093 is the term for a white dwarf in the constellation Centaurus. The approximately 15.3 parsecs distant object is according to the latest measurements probably a metropolitan crystalline carbon of 4000 km in diameter and bears the nickname diamond star. Through the processes customary in stellar evolution, but this can not be directly compared with a diamond equivalent size - a teaspoon of the star has about five tons of mass.
Special attention deserves the star, since it is a crystalline core was detected first, theoretical calculations were such a structure in old stars so far only guess. The crystalline mass of BPM 37093 is estimated to be more than 5 × 1029 kg.