Alnilam vs Rigel
| 属性 | Alnilam | Rigel |
|---|---|---|
| 命名 | 46Eps Ori | 19Bet Ori |
| 星座 | Orion | Orion |
| 光谱类型 | Class B — B-type (Blue-White) | Class B — B-type (Blue-White) |
| 视星等 | +1.69 | +0.18 |
| 绝对星等 | -7.22 | -6.93 |
| 距离 | 1,977 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
- ◆ Both are massive, highly luminous stars visible in Orion.
- ◆ Alnilam is the middle star of Orion's Belt — both are blue supergiants, though Alnilam is hotter at ~27,500 K versus Rigel's ~12,100 K.
- ◆ Alnilam is about 2,000 light-years distant; Rigel is closer at ~860 light-years.
- ◆ Alnilam has a mass of ~40 M☉, nearly double Rigel's ~21 M☉.
- ◆ Rigel is visible at the foot of Orion; Alnilam is the central jewel of Orion's Belt.