아케르나르 vs 레굴루스
Absolute magnitudes of −2.70 and −0.57 are what most distinguish the two. 레굴루스 trails in apparent brightness at magnitude +1.36 against +0.45, leaving 아케르나르 around 2.3 times the brighter target. 레굴루스 is a B-type star in Leo, while 아케르나르 is a B-type star. 아케르나르 is the remoter of the pair at 139 light-years, roughly 1.8 times the 79.3 that separates us from 레굴루스.
Property comparison
| Property | 아케르나르 | 레굴루스 |
|---|---|---|
| 명칭 | Alp Eri | 32Alp Leo |
| 별자리 | N/A | Leo |
| 분광형 | Class B — B-type (Blue-White) | Class B — B-type (Blue-White) |
| 겉보기 등급 | +0.45 | +1.36 |
| 절대 등급 | -2.70 | -0.57 |
| 거리 | 139 ly | 79.3 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: 아케르나르 · 레굴루스
Key differences
Key Differences
- ◆ Both are rapidly rotating hot stars that are noticeably oblate due to centrifugal force.
- ◆ Achernar's equatorial diameter is 56% larger than its polar diameter — the flattest bright star known.
- ◆ Achernar is a B-type star at ~14,500 K; Regulus is also B-type at ~12,460 K.
- ◆ Achernar is in Eridanus at 139 light-years; Regulus is in Leo at 79 light-years.
- ◆ Regulus sits almost exactly on the ecliptic and is frequently occulted by the Moon.