Pi Persei
Pi Persei, also known as Gorgonea Secunda, is a single star in the northern constellation Perseus. It appears white and is just visible to the naked eye with an apparent magnitude of about 4.7. It is located about 303 light-years away and is moving away from us at roughly 14 km/s.
Pi Persei is an A-type main-sequence star (A2Vn). The 'n' indicates broadened spectral lines due to rapid rotation, and the star spins about 186 km/s. It has about 2.1 solar masses, a radius of 4.8 solar radii, and it shines about 170 times brighter than the Sun. Its surface temperature is around 9,290 K. The star is roughly 272 million years old. In Chinese astronomy it is named Jīshī, meaning "Heap of Corpses."
This page was last edited on 2 February 2026, at 07:30 (CET).