Algol vs Mirfak

Property Algol Mirfak
Bezeichnung 26Bet Per 33Alp Per
Sternbild Perseus Perseus
Spektralklasse Class B — B-type (Blue-White) Class F — F-type (Yellow-White)
Scheinbare Helligkeit +2.09 +1.79
Absolute Helligkeit -0.11 -4.17
Entfernung 89.9 ly 506 ly
Masse N/A N/A
Radius N/A N/A
Temperatur N/A N/A
Leuchtkraft N/A N/A

Key Differences

  • Both are prominent stars in Perseus and are often observed together.
  • Mirfak is a yellow-white supergiant and the brightest member of the Alpha Persei Cluster.
  • Algol is the famous Demon Star — the prototype eclipsing binary variable.
  • Algol varies in brightness every 2.87 days; Mirfak does not show significant variability.
  • Mirfak is farther away at ~510 light-years; Algol is ~93 light-years from Earth.

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