Acrux vs Spica
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| Property | Acrux | Spica |
|---|---|---|
| Designation | Alp1Cru | 67Alp Vir |
| Constellation | Crux | Virgo |
| Spectral Class | Class B — B-type (Blue-White) | Class B — B-type (Blue-White) |
| Apparent Magnitude | +0.77 | +0.98 |
| Absolute Magnitude | -4.20 | -3.44 |
| Distance | 322 ly | 250 ly |
| Mass | N/A | N/A |
| Radius | N/A | N/A |
| Temperature | N/A | N/A |
| Luminosity | N/A | N/A |
Key Differences
- ◆ Both are among the brightest stars in the southern sky and both are hot B-type systems.
- ◆ Acrux is the brightest star in the Southern Cross; Spica is the brightest in Virgo.
- ◆ Spica is a tidally distorted spectroscopic binary with a 4-day orbital period.
- ◆ Acrux has components resolvable through a small telescope; Spica's components cannot be resolved visually.
- ◆ Acrux appears on the national flags of Australia, New Zealand, Papua New Guinea, Samoa, and Brazil.