カノープス vs シリウス
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| Property | カノープス | シリウス |
|---|---|---|
| 名称 | Alp Car | 9Alp CMa |
| 星座 | N/A | Canis Major |
| スペクトル型 | Class F — F-type (Yellow-White) | Class A — A-type (White) |
| 見かけの等級 | -0.62 | -1.44 |
| 絶対等級 | -5.50 | 1.45 |
| 距離 | 309 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
- ◆ Sirius is the brightest star in the sky (mag −1.46); Canopus is the second-brightest (mag −0.74).
- ◆ Sirius is only 8.6 light-years away; Canopus is approximately 310 light-years distant.
- ◆ Canopus is a luminous F-type bright giant at ~10,700 L☉; Sirius is an A-type main-sequence star at 25.4 L☉.
- ◆ Canopus is used for spacecraft attitude control due to its exceptional brightness.
- ◆ Sirius has a white dwarf companion (Sirius B); Canopus is not known to have a stellar companion.