![]() ![]() Location of α Serpentis (circled) |
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Observation data Epoch J2000 Equinox J2000 |
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Constellation | Serpens |
Right ascension | 15 |
Declination | +06° 25′ 32.2633″ |
Apparent magnitude (V) | 2.623 |
Characteristics | |
Spectral type | K2 III |
U−B color index | +1.248 |
B−V color index | +1.167 |
Astrometry | |
Radial velocity (Rv) | +2.63 km/s |
Proper motion (μ) | RA: +133.84 mas/yr |
Parallax (π) | 44.10 ± 0.19mas |
Distance | 74.0 ± 0.3 ly (22.68 ± 0.10 pc) |
Absolute magnitude (MV) | +0.88 ± 0.03 |
Details | |
Radius | 12R☉ |
Luminosity | 70L☉ |
Surface gravity (log g) | 2.5 |
Temperature | 4,498K |
Metallicity [Fe/H] | 0.03dex |
Rotational velocity (v sin i) | 4.3 km/s |
Other designations | |
Unukalhai, Cor Serpentis, 24 Serpentis, HR 5854, HD 140573, SAO 121157, HIP 77070, ADS 9765, CCDM 15442+0626.
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