Achernar vs Regulus

Property Achernar Regulus
Designación Alp Eri 32Alp Leo
Constelación N/A Leo
Clase Espectral Class B — B-type (Blue-White) Class B — B-type (Blue-White)
Magnitud Aparente +0.45 +1.36
Magnitud Absoluta -2.70 -0.57
Distancia 139 ly 79.3 ly
Masa N/A N/A
Radio N/A N/A
Temperatura N/A N/A
Luminosidad N/A N/A

Key Differences

  • Both are rapidly rotating hot stars that are noticeably oblate due to centrifugal force.
  • Achernar's equatorial diameter is 56% larger than its polar diameter — the flattest bright star known.
  • Achernar is a B-type star at ~14,500 K; Regulus is also B-type at ~12,460 K.
  • Achernar is in Eridanus at 139 light-years; Regulus is in Leo at 79 light-years.
  • Regulus sits almost exactly on the ecliptic and is frequently occulted by the Moon.

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