Chi Pegasi
Chi Pegasi, Latinized from χ Pegasi, is a single star in the northern constellation of Pegasus, along the eastern constellation border with Pisces. It has a reddish hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.80. The distance to this star is approximately 368 light years based on parallax, but it is drifting closer with a radial velocity of -46 km/s.
This is an aging red giant star on the asymptotic giant branch with a stellar classification of M2+III. It is a suspected small-amplitude variable. The star is about 8 billion years old with a mass 6% greater than the Sun. With the supply of hydrogen at its core exhausted, the star has cooled and expanded to 53 times the girth of the Sun. It is radiating around 435 times the luminosity of the Sun from its swollen photosphere at an effective temperature of 3,842 K.
