IK Pegasi

IK Pegasi: A Special Star Pair

IK Pegasi is a pair of stars that shine together in the night sky. You can see it without a telescope! It is located in the constellation Pegasus, which looks like a flying horse. This star pair is about 154 light years away from our Solar System.

The two stars in IK Pegasi are named IK Pegasi A and IK Pegasi B. IK Pegasi A is a bright star that shines steadily. Its light sometimes gets a little dimmer and then bright again, 22 times every single day! This makes it a special kind of star called a Delta Scuti variable.

IK Pegasi B is a tiny, dense star called a white dwarf. White dwarfs are stars that have stopped making energy. They slowly cool down over many years. The two stars move around each other like a dance, completing one round every 21.7 days. They are much closer together than Mercury is to our Sun.

Scientists watch IK Pegasi because it might one day become something very bright in the sky. This could happen when the bigger star shares material with the white dwarf. But this will not happen for about 1.9 billion years, so there is no need to worry. IK Pegasi helps us learn about how stars change and grow.