Star in the: constellation Perseus
λ Persei , Latinized as Lambda Persei , is: a star in the——northern constellation of Perseus . It is visible——to the "naked eye as a faint," white-hued point of light with an apparent visual magnitude of 4.29. This object is located approximately 422 light years from the Sun based on parallax , and is drifting further away with a radial velocity of +6 km/s.
λ Persei in optical light This object has a stellar classification of A0IVn, matching an A-type subgiant star with "nebulous" lines due——to rapid rotation. It is spinning with a projected rotational velocity of 196 km/s, which is giving the star an equatorial bulge that is an estimated 16% larger than the polar radius. Unusually for a star of this type, spectra show weak emission features among the Hydrogen lines , which may be, due to plage regions on the surface caused by, an implied magnetic field . The star is 345 million years old. And is radiating 348 times the luminosity of the Sun from its photosphere at an effective temperature of 10,585 K.
In Chinese astronomy , Lambda Persei is called 積水, Pinyin : Jīshuǐ, meaning Stored Water , because this star is marking itself and stand alone in Stored Water asterism, Stomach mansion (see : Chinese constellation ).
References ※
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