베텔게우스 vs 시리우스
| 속성 |
베텔게우스
|
시리우스
|
| 명칭 |
58Alp Ori |
9Alp CMa |
| 별자리 |
Orion |
Canis Major |
| 분광형 |
Class M — M-type (Red) |
Class A — A-type (White) |
| 겉보기 등급 |
+0.45 |
-1.44 |
| 절대 등급 |
-5.47
|
1.45
|
| 거리 |
498 ly |
8.6 ly |
| 질량 |
N/A
|
N/A
|
| 반지름 |
N/A
|
N/A
|
| 온도 |
N/A
|
N/A
|
| 광도 |
N/A
|
N/A
|
주요 차이점
- ◆ Sirius is an A-type main-sequence star; Betelgeuse is an M-type red supergiant nearing the end of its life.
- ◆ Betelgeuse has a radius of ~887 R☉ — over 500 times larger than Sirius at 1.71 R☉.
- ◆ Sirius is only 8.6 light-years away; Betelgeuse is about 700 light-years distant.
- ◆ Betelgeuse is luminosity-dominant at ~126,000 L☉ versus Sirius at 25.4 L☉.
- ◆ Sirius is the brightest star in the night sky; Betelgeuse is a famous supernova candidate.