プロキシマ・ケンタウリ vs シリウス
| Property |
プロキシマ・ケンタウリ |
シリウス |
| 名称 |
N/A |
9Alp CMa |
| 星座 |
Centaurus |
Canis Major |
| スペクトル型 |
Class M — M-type (Red) |
Class A — A-type (White) |
| 見かけの等級 |
+11.01 |
-1.44 |
| 絶対等級 |
15.45 |
1.45 |
| 距離 |
4.2 ly |
8.6 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
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Sirius is a brilliant A-type star 8.6 ly away; Proxima Centauri is a faint M-type red dwarf at 4.24 ly.
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◆
Proxima Centauri is the closest star to the Sun; Sirius is the closest naked-eye star in its direction.
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◆
Sirius is 25.4 times more luminous than the Sun; Proxima Centauri produces only 0.17% of the Sun's light.
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◆
Proxima Centauri hosts confirmed exoplanets in the habitable zone; Sirius has no known planets.
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◆
Sirius shines at magnitude −1.46; Proxima Centauri at magnitude 11.1 is invisible to the naked eye.