アルタイル vs ベガ
| 特性 |
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
|
主な違い
- ◆ 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.