Eta

Hot blue star

Its story

Eta Lupi is a triple system whose inner pair takes some 27,000 years to complete a single orbit—glacial by human reckoning, an eyeblink in stellar time. Its dominant member is a blue subgiant, partnered with a chemically peculiar star whose surface bears strange metallic abundances. The light reaching the eye tonight left 442 years ago, deep in the southern Wolf.

Constellation: Lupus
Apparent magnitude: 3.42
Distance: 442.0 light years
Coordinates (J2000): RA 240.031° · Dec -38.397°
Catalogue: HIP 78384 · HD 143118

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