Регул vs Спика

Property Регул Спика
Обозначение 32Alp Leo 67Alp Vir
Созвездие Leo Virgo
Спектральный класс Class B — B-type (Blue-White) Class B — B-type (Blue-White)
Видимая звёздная величина +1.36 +0.98
Абсолютная звёздная величина -0.57 -3.44
Расстояние 79.3 ly 250 ly
Масса N/A N/A
Радиус N/A N/A
Температура N/A N/A
Светимость N/A N/A

Key Differences

  • Both are hot B-type stars lying close to or on the ecliptic, frequently occulted by the Moon.
  • Spica is a spectroscopic binary with tidal distortion; Regulus is a fast-spinning quadruple system.
  • Spica is about 250 light-years away; Regulus is closer at about 79 light-years.
  • Spica's temperature (~25,300 K) is roughly twice that of Regulus (~12,460 K).
  • Hipparchus used Spica observations to discover the precession of the equinoxes around 130 BCE.

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