アリオト vs Dubhe
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| Property | アリオト | Dubhe |
|---|---|---|
| 名称 | 77Eps UMa | 50Alp UMa |
| 星座 | Ursa Major | Ursa Major |
| スペクトル型 | Class A — A-type (White) | Class F — F-type (Yellow-White) |
| 見かけの等級 | +1.76 | +1.81 |
| 絶対等級 | -0.26 | -1.07 |
| 距離 | 82.5 ly | 123 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 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.