Acrux vs Spica

Property Acrux Spica
Bezeichnung Alp1Cru 67Alp Vir
Sternbild Crux Virgo
Spektralklasse Class B — B-type (Blue-White) Class B — B-type (Blue-White)
Scheinbare Helligkeit +0.77 +0.98
Absolute Helligkeit -4.20 -3.44
Entfernung 322 ly 250 ly
Masse N/A N/A
Radius N/A N/A
Temperatur N/A N/A
Leuchtkraft N/A N/A

Key Differences

  • Both are among the brightest stars in the southern sky and both are hot B-type systems.
  • Acrux is the brightest star in the Southern Cross; Spica is the brightest in Virgo.
  • Spica is a tidally distorted spectroscopic binary with a 4-day orbital period.
  • Acrux has components resolvable through a small telescope; Spica's components cannot be resolved visually.
  • Acrux appears on the national flags of Australia, New Zealand, Papua New Guinea, Samoa, and Brazil.

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