Canopus vs Rigel
| 属性 | Canopus | Rigel |
|---|---|---|
| 命名 | Alp Car | 19Bet Ori |
| 星座 | N/A | Orion |
| 光谱类型 | Class F — F-type (Yellow-White) | Class B — B-type (Blue-White) |
| 视星等 | -0.62 | +0.18 |
| 绝对星等 | -5.50 | -6.93 |
| 距离 | 309 ly | 863 ly |
| 质量 | N/A | N/A |
| 半径 | N/A | N/A |
| 温度 | N/A | N/A |
| 光度 | N/A | N/A |
主要差异
- ◆ Canopus is an F-type bright giant; Rigel is a B-type blue supergiant — they differ greatly in spectral type.
- ◆ Both are extremely luminous: Canopus ~10,700 L☉ and Rigel ~120,000 L☉.
- ◆ Canopus is used for spacecraft navigation; Rigel is a landmark star in Orion.
- ◆ Rigel is hotter at ~12,100 K versus Canopus at ~7,400 K.
- ◆ Canopus is the second-brightest star in the sky; Rigel is the seventh-brightest.