Канопус vs Сириус

Property Канопус Сириус
Обозначение Alp Car 9Alp CMa
Созвездие N/A Canis Major
Спектральный класс Class F — F-type (Yellow-White) Class A — A-type (White)
Видимая звёздная величина -0.62 -1.44
Абсолютная звёздная величина -5.50 1.45
Расстояние 309 ly 8.6 ly
Масса N/A N/A
Радиус N/A N/A
Температура N/A N/A
Светимость N/A N/A

Key Differences

  • Sirius is the brightest star in the sky (mag −1.46); Canopus is the second-brightest (mag −0.74).
  • Sirius is only 8.6 light-years away; Canopus is approximately 310 light-years distant.
  • Canopus is a luminous F-type bright giant at ~10,700 L☉; Sirius is an A-type main-sequence star at 25.4 L☉.
  • Canopus is used for spacecraft attitude control due to its exceptional brightness.
  • Sirius has a white dwarf companion (Sirius B); Canopus is not known to have a stellar companion.

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