알리오스 vs Dubhe
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| Property | 알리오스 | Dubhe |
|---|---|---|
| 명칭 | 77Eps UMa | 50Alp UMa |
| 별자리 | Ursa Major | Ursa Major |
| 분광형 | Class A — A-type (White) | Class F — F-type (Yellow-White) |
| 겉보기 등급 | +1.76 | +1.81 |
| 절대 등급 | -0.26 | -1.07 |
| 거리 | 82.5 ly | 123 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 the two brightest stars of the Big Dipper in Ursa Major, but they differ in type and motion.
- ◆ Alioth (Epsilon UMa) is an A-type chemically peculiar variable; Dubhe (Alpha UMa) is a K-type giant.
- ◆ Alioth is a member of the Ursa Major Moving Group; Dubhe is not and moves in the opposite direction.
- ◆ Dubhe forms the 'pointer pair' with Merak that indicates Polaris.
- ◆ Alioth is slightly brighter than Dubhe despite the Alpha/Epsilon designations.