Canopus vs Rigel

Property Canopus Rigel
Designación Alp Car 19Bet Ori
Constelación N/A Orion
Clase Espectral Class F — F-type (Yellow-White) Class B — B-type (Blue-White)
Magnitud Aparente -0.62 +0.18
Magnitud Absoluta -5.50 -6.93
Distancia 309 ly 863 ly
Masa N/A N/A
Radio N/A N/A
Temperatura N/A N/A
Luminosidad N/A N/A

Key Differences

  • Canopus is an F-type bright giant; Rigel is a B-type blue supergiant — they differ greatly in spectral type.
  • Both are extremely luminous: Canopus ~10,700 L☉ and Rigel ~120,000 L☉.
  • Canopus is used for spacecraft navigation; Rigel is a landmark star in Orion.
  • Rigel is hotter at ~12,100 K versus Canopus at ~7,400 K.
  • Canopus is the second-brightest star in the sky; Rigel is the seventh-brightest.

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