![]() ![]() Location of ε Boötes (circled) |
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Observation data Epoch J2000 Equinox J2000 |
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Constellation | Boötes |
Right ascension | 14 |
Declination | +27° 04′ 27.2099″ |
Apparent magnitude (V) | 2.37 |
Characteristics | |
Spectral type | K0 II-III |
U−B color index | +0.73 |
B−V color index | +0.97 |
Astrometry | |
Radial velocity (Rv) | -16.31 km/s |
Proper motion (μ) | RA: -50.95 mas/yr |
Parallax (π) | 16.10 ± 0.66mas |
Distance | 203 ± 8 ly (62 ± 3 pc) |
Details | |
A | |
Mass | 4.6M☉ |
Radius | 33R☉ |
Luminosity | 501L☉ |
Surface gravity (log g) | 2.2 |
Temperature | 4,550K |
Metallicity | –0.13 |
Rotational velocity (v sin i) | 10.9 km/s |
Age | 37.4 ± 4.2Myr |
B | |
Rotational velocity (v sin i) | 123 km/s |
Other designations | |
Eps Boo, Izar, Pulcherrima, Mirac, Mirak, Mirach, 36 Boo, BD +27 2417, HIP 72105
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