시리우스 vs 베가
| Property |
시리우스 |
베가 |
| 명칭 |
9Alp CMa |
3Alp Lyr |
| 별자리 |
Canis Major |
Lyra |
| 분광형 |
Class A — A-type (White) |
Class A — A-type (White) |
| 겉보기 등급 |
-1.44 |
+0.03 |
| 절대 등급 |
1.45 |
0.60 |
| 거리 |
8.6 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 brilliant white A-type stars and among the most prominent in the northern sky.
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◆
Sirius is the brightest star overall at magnitude −1.46; Vega is the fifth-brightest at magnitude 0.03.
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◆
Sirius is 8.6 light-years away; Vega is 25 light-years from the Sun.
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◆
Vega was the original zero-point for stellar magnitude; Sirius sets the scale of brightness.
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◆
Sirius has a white dwarf companion; Vega has a prominent debris disk but no known companion.