Sigma Persei (Sigma Per, σ Persei, σ Per) is an orange K-type

giant In folklore, giants (from Ancient Greek: '' gigas'', cognate giga-) are beings of human-like appearance, but are at times prodigious in size and strength or bear an otherwise notable appearance. The word ''giant'' is first attested in 1297 fr ...

with an

apparent magnitude Apparent magnitude () is a measure of the brightness of a star or other astronomical object observed from Earth. An object's apparent magnitude depends on its intrinsic luminosity, its distance from Earth, and any extinction of the object's li ...

of +4.36. It is approximately 360

light years A light-year, alternatively spelled light year, is a large unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometers (), or 5.88 trillion miles ().One trillion here is taken to be 1012 ...

from

Earth Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large volumes of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surfa ...

. Sigma Persei is moving through the Galaxy at a speed of 17.4 km/s relative to the Sun. Its projected Galactic orbit carries it between 24,400 and 43,600 light years from the center of the Galaxy. It came closest to the Sun 5.1 million years ago when it had brightened to magnitude 3.11 from a distance of 202 light years.Sigma Persei (HIP 16335)
/ref> It has one reported planet, b, with a period of 580 days and a mass approximately 6.5 times that of Jupiter.

Name and etymology

This star, together with δ Per, ψ Per, α Per, γ Per and η Per, has been called ''the Segment of Perseus''.

References

{{DEFAULTSORT:Sigma Persei Persei, Sigma Perseus (constellation) K-type giants Persei, 35 016335

1052 Year 1052 ( MLII) was a leap year starting on Wednesday (link will display the full calendar) of the Julian calendar. Events By place England * Summer – Godwin, Earl of Wessex, sails with a large fleet up the Thames to London, ...

021552 BD+47 843 Suspected variables