noun, masculine/ˌpeˈɾjeljo/plural: perihelios
perihelio is masculine in Spanish.
perihelion (the point in the elliptical orbit of a comet, planet, etc., where it is nearest to the Sun)
Antonyms: afelio
Borrowed from New Latin perihēlium, from Ancient Greek περί (perí, “around”) + ἥλιος (hḗlios, “the Sun”).