폴라리스 vs Schedar
| 속성 | 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 |
주요 차이점
- ◆ 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.