アルゴル vs Mira

Property アルゴル Mira
名称 26Bet Per 68Omi Cet
星座 Perseus N/A
スペクトル型 Class B — B-type (Blue-White) Class M — M-type (Red)
見かけの等級 +2.09 +6.47
絶対等級 -0.11 1.66
距離 89.9 ly 299 ly
質量 N/A N/A
半径 N/A N/A
温度 N/A N/A
光度 N/A N/A

Key Differences

  • Both are famous variable stars but of completely different types.
  • Algol is an eclipsing binary — it dims when its fainter companion passes in front; Mira is a pulsating long-period variable.
  • Algol varies every 2.87 days; Mira has a pulsation period of ~332 days.
  • Mira is a red giant that sheds material, leaving a 13-light-year tail; Algol is a B-type star system.
  • Algol was probably the first eclipsing variable to be recognized by ancient observers.

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