レグルス vs スピカ
| 特性 | レグルス | スピカ |
|---|---|---|
| 名称 | 32Alp Leo | 67Alp Vir |
| 星座 | Leo | Virgo |
| スペクトル型 | Class B — B-type (Blue-White) | Class B — B-type (Blue-White) |
| 見かけの等級 | +1.36 | +0.98 |
| 絶対等級 | -0.57 | -3.44 |
| 距離 | 79.3 ly | 250 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 |
主な違い
- ◆ 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.