デネブ vs ベガ
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| Property | デネブ | ベガ |
|---|---|---|
| 名称 | 50Alp Cyg | 3Alp Lyr |
| 星座 | Cygnus | Lyra |
| スペクトル型 | Class A — A-type (White) | Class A — A-type (White) |
| 見かけの等級 | +1.25 | +0.03 |
| 絶対等級 | -6.93 | 0.60 |
| 距離 | 1,412 ly | 25.0 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 A-type stars in the Summer Triangle, but they differ enormously in distance and luminosity.
- ◆ Vega is only 25 light-years away; Deneb is the most distant first-magnitude star at ~2,615 light-years.
- ◆ Deneb is intrinsically about 196,000 times more luminous than the Sun; Vega is 40 times more luminous.
- ◆ Vega was the original photometric zero-magnitude reference star.
- ◆ Deneb is a white supergiant with a radius ~203 R☉; Vega is a near-main-sequence star with radius ~2.4 R☉.