Epoch J2000.0 Equinox J2000.0
|Right ascension||04h 14m 53.86s|
|Declination||+48° 24' 33.7"|
|Apparent magnitude (V)||+4.12|
Mu Persei (Mu Per, μ Persei, μ Per) is multiple star system and in constellation of Perseus, with an apparent magnitude of +4.12. The primary component is an yellow G-type supergiant. It is approximately 723 light years from Earth. With the measured temperature as 5337 Kelvin and a radius of 53 times solar, this star has the luminosity same as 2030 times of Sun.
Mu Persei is moving through the Galaxy at a speed of 35.6 km/s relative to the Sun. Its projected Galactic orbit carries it between 23,900 and 32,400 light years from the center of the Galaxy.
Mu Persei came closest to the Sun 5.6 million years ago when it had brightened to magnitude 3.25 from a distance of 600 light years.
In Chinese, 天船 (Tiān Chuán), meaning Celestial Boat, refers to an asterism consisting of μ Persei, η Persei, γ Persei, α Persei, ψ Persei, δ Persei, 48 Persei and HD 27084. Consequently, μ Persei itself is known as 天船七 (Tiān Chuán qī, English: the Seventh Star of Celestial Boat.)