Regulus vs Alpha Virginis
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| Property | Regulus | Alpha Virginis |
|---|---|---|
| Ký Hiệu | 32Alp Leo | 67Alp Vir |
| Chòm Sao | Leo | Virgo |
| Phân Loại Quang Phổ | Class B — B-type (Blue-White) | Class B — B-type (Blue-White) |
| Cấp Sao Biểu Kiến | +1.36 | +0.98 |
| Cấp Sao Tuyệt Đối | -0.57 | -3.44 |
| Khoảng Cách | 79.3 ly | 250 ly |
| Khối Lượng | N/A | N/A |
| Bán Kính | N/A | N/A |
| Nhiệt Độ | N/A | N/A |
| Độ Sáng | 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.