Algol vs Kutup Yıldızı

Property Algol Kutup Yıldızı
Adlandırma 26Bet Per 1Alp UMi
Takımyıldız Perseus N/A
Spektral Sınıf Class B — B-type (Blue-White) Class F — F-type (Yellow-White)
Görünür Parlaklık +2.09 +1.97
Mutlak Parlaklık -0.11 -3.64
Mesafe 89.9 ly 433 ly
Kütle N/A N/A
Yarıçap N/A N/A
Sıcaklık N/A N/A
Parlaklık N/A N/A

Key Differences

  • Both are variable stars, but of different physical types.
  • Polaris is a Cepheid variable that pulsates in radius; Algol dims because a companion eclipses it.
  • Polaris's pulsation amplitude has been decreasing over the past century.
  • Algol varies every 2.87 days (eclipsing); Polaris has a period of about 3.97 days (pulsation).
  • Polaris is near the north celestial pole and vital for navigation; Algol is in Perseus and known as the Demon Star.

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