Epsilon Crucis
From Infogalactic: the planetary knowledge core
 Crux, showing Epsilon Crucis in relation to the other main stars |
|
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Crux |
| Right ascension | 12h 21m 21.6s |
| Declination | −60° 24′ 4″ |
| Apparent magnitude (V) | 3.56 |
| Characteristics | |
| Spectral type | K3III |
| U−B color index | 1.63 |
| B−V color index | 1.42 |
| Astrometry | |
| Radial velocity (Rv) | −4.6 km/s |
| Proper motion (μ) | RA: −171.06 mas/yr Dec.: 91.83 mas/yr |
| Parallax (π) | 14.30 ± -.56 mas |
| Distance | 228 ± −9 ly (70 ± −3 pc) |
| Absolute magnitude (MV) | −0.63 ± 0.09[1] |
| Details | |
| Mass | 1.42 ± 0.22[1] M☉ |
| Radius | 32.9 ± 2.5[1] R☉ |
| Surface gravity (log g) | 1.52 ± 0.11[1] cgs |
| Temperature | 4,148[1] K |
| Metallicity [Fe/H] | −0.10[1] dex |
| Age | 2.83 ± 1.20[1] Gyr |
| Other designations | |
Epsilon Crucis (ε Cru, ε Crucis) is a Class K3III, fourth-magnitude star in the constellation Crux. It is sometimes called Intrometida (intrusive) in Portuguese.[2] This star is an orange giant, located about 228 light-years from Earth.
Modern legacy
ε Cru is represented on the flags of Australia and Papua New Guinea. It is also featured in the flag of Brazil, along with 26 other stars, each of which represents a state. ε Cru represents the State of Espírito Santo.[3]
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References
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