The Castor star is about 2.3 times the mass of the sun.

The Castor star is twice the size in diameter if the sun.

The Castor sizi is 6 times the luminostity compared to the sun.

It is 10,300/8,840K.("K." is used to determine the temperature."K" stands for Kelvin.)

It is a light quite blue.

It is 52 light years away from the sun.