알타이르 vs 베가
| Property |
알타이르 |
베가 |
| 명칭 |
53Alp Aql |
3Alp Lyr |
| 별자리 |
Aquila |
Lyra |
| 분광형 |
Class A — A-type (White) |
Class A — A-type (White) |
| 겉보기 등급 |
+0.76 |
+0.03 |
| 절대 등급 |
2.21 |
0.60 |
| 거리 |
16.7 ly |
25.0 ly |
| 질량 |
N/A |
N/A |
| 반지름 |
N/A |
N/A |
| 온도 |
N/A |
N/A |
| 광도 |
N/A |
N/A |
Key Differences
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Both are A-type stars forming part of the Summer Triangle asterism along with Deneb.
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Vega is at 25 light-years; Altair is even closer at 16.7 light-years.
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Altair rotates extremely rapidly (once every 10.4 hours), making it noticeably oblate; Vega also rotates fast but less extremely.
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Vega is about four times more luminous than Altair.
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Vega has a prominent debris disk suggesting possible planetary formation; Altair's disk is less prominent.