Regulus vs Spica
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| Property | Regulus | Spica |
|---|---|---|
| 命名 | 32Alp Leo | 67Alp Vir |
| 星座 | Leo | Virgo |
| 光谱类型 | Class B — B-type (Blue-White) | Class B — B-type (Blue-White) |
| 视星等 | +1.36 | +0.98 |
| 绝对星等 | -0.57 | -3.44 |
| 距离 | 79.3 ly | 250 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 |
Key Differences
- ◆ Both are hot B-type stars lying close to or on the ecliptic, frequently occulted by the Moon.
- ◆ Spica is a spectroscopic binary with tidal distortion; Regulus is a fast-spinning quadruple system.
- ◆ Spica is about 250 light-years away; Regulus is closer at about 79 light-years.
- ◆ Spica's temperature (~25,300 K) is roughly twice that of Regulus (~12,460 K).
- ◆ Hipparchus used Spica observations to discover the precession of the equinoxes around 130 BCE.