アルタイル vs ベガ
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| Property | アルタイル | ベガ |
|---|---|---|
| 名称 | 53Alp Aql | 3Alp Lyr |
| 星座 | Aquila | Lyra |
| スペクトル型 | Class A — A-type (White) | Class A — A-type (White) |
| 見かけの等級 | +0.76 | +0.03 |
| 絶対等級 | 2.21 | 0.60 |
| 距離 | 16.7 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 forming part of the Summer Triangle asterism along with Deneb.
- ◆ Vega is at 25 light-years; Altair is even closer at 16.7 light-years.
- ◆ Altair rotates extremely rapidly (once every 10.4 hours), making it noticeably oblate; Vega also rotates fast but less extremely.
- ◆ Vega is about four times more luminous than Altair.
- ◆ Vega has a prominent debris disk suggesting possible planetary formation; Altair's disk is less prominent.