폴라리스 vs Schedar

Property 폴라리스 Schedar
명칭 1Alp UMi 18Alp Cas
별자리 N/A Cassiopeia
분광형 Class F — F-type (Yellow-White) Class K — K-type (Orange)
겉보기 등급 +1.97 +2.24
절대 등급 -3.64 -1.98
거리 433 ly 228 ly
질량 N/A N/A
반지름 N/A N/A
온도 N/A N/A
광도 N/A N/A

Key Differences

  • ◆ Both are bright northern circumpolar stars useful for orientation near the north celestial pole.
  • ◆ Polaris (F-type Cepheid) is currently ~0.7° from the true north pole; Schedar is the brightest star in the W-shaped Cassiopeia.
  • ◆ Schedar is a K-type orange giant at ~228 light-years; Polaris is an F-type supergiant at ~431 light-years.
  • ◆ Cassiopeia (containing Schedar) and Ursa Minor (containing Polaris) are on opposite sides of the pole.
  • ◆ As the pole precesses, Schedar will become a closer pole star in the distant future.

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