레굴루스 vs 스피카
A 2.87-magnitude difference in absolute output separates them, −3.44 to −0.57. 레굴루스 is the nearer of the two at 79.3 light-years, while 스피카 lies 250 light-years away, some 3.1 times farther. By spectral type the pair divides into a B-type star in Leo for 레굴루스 and a B-type star in Virgo for 스피카. To the unaided eye 스피카 leads at magnitude +0.98 to +1.36, a gap of 0.38 worth about 1.4 times the light of 레굴루스.
Property comparison
| Property | 레굴루스 | 스피카 |
|---|---|---|
| 명칭 | 32Alp Leo | 67Alp Vir |
| 별자리 | Leo | Virgo |
| 분광형 | Class B — B-type (Blue-White) | Class B — B-type (Blue-White) |
| 겉보기 등급 | +1.36 | +0.98 |
| 절대 등급 | -0.57 | -3.44 |
| 거리 | 79.3 ly | 250 ly |
| 질량 | N/A | N/A |
| 반지름 | N/A | N/A |
| 온도 | N/A | N/A |
| 광도 | N/A | N/A |
Full data for each star: 레굴루스 · 스피카
Key differences
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.