Acrux vs Hadar
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| Property | Acrux | Hadar |
|---|---|---|
| ชื่อเรียก | Alp1Cru | Bet Cen |
| กลุ่มดาว | Crux | Centaurus |
| ประเภทสเปกตรัม | Class B — B-type (Blue-White) | Class B — B-type (Blue-White) |
| โชติมาตรปรากฏ | +0.77 | +0.61 |
| โชติมาตรสัมบูรณ์ | -4.20 | -4.79 |
| ระยะทาง | 322 ly | 392 ly |
| มวล | N/A | N/A |
| รัศมี | N/A | N/A |
| อุณหภูมิ | N/A | N/A |
| ความส่องสว่าง | N/A | N/A |
Key Differences
- ◆ Both are bright B-type stars in Centaurus/Crux, forming the southern pointer stars to the Southern Cross.
- ◆ Hadar (Beta Centauri) is a triple star system; Acrux is also a multiple star system.
- ◆ Hadar is about 525 light-years away; Acrux is slightly farther at ~321 light-years.
- ◆ Together with Alpha Centauri, Hadar points toward the Southern Cross where Acrux marks the top.
- ◆ Both have very high intrinsic luminosities — Hadar at ~41,700 L☉ and Acrux at ~25,000 L☉.