Meaning of autumnal star in English:

autumnal star

noun

  • (Originally, now historical and somewhat rare) a star associated with autumn, especially through redness of colour or association with falling or decline; specifically (with the) Sirius; (in later use chiefly) a star prominent in the sky in autumn.

    Often with allusion to Milton or (referring to Sirius) to Homer.

Origin

Late 16th century; earliest use found in Joshua Sylvester (d. 1618), poet and translator.