Algol vs Mira
| 属性 | Algol | Mira |
|---|---|---|
| 命名 | 26Bet Per | 68Omi Cet |
| 星座 | Perseus | N/A |
| 光谱类型 | Class B — B-type (Blue-White) | Class M — M-type (Red) |
| 视星等 | +2.09 | +6.47 |
| 绝对星等 | -0.11 | 1.66 |
| 距离 | 89.9 ly | 299 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 famous variable stars but of completely different types.
- ◆ Algol is an eclipsing binary — it dims when its fainter companion passes in front; Mira is a pulsating long-period variable.
- ◆ Algol varies every 2.87 days; Mira has a pulsation period of ~332 days.
- ◆ Mira is a red giant that sheds material, leaving a 13-light-year tail; Algol is a B-type star system.
- ◆ Algol was probably the first eclipsing variable to be recognized by ancient observers.