Lambda Sagittarii
Orange-hued subgiant star in the constellation Sagittarius / From Wikipedia, the free encyclopedia
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Lambda Sagittarii (Latinized from λ Sagittarii), formally named Kaus Borealis /ˈkɔːs bɒriˈælɪs/,[8][9] is a star in the southern constellation of Sagittarius. The star marks the top of the Archer's bow.
Quick Facts Constellation, Right ascension ...
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Sagittarius |
Right ascension | 18h 27m 58.24072s[1] |
Declination | −25° 25′ 18.1146″[1] |
Apparent magnitude (V) | +2.82[2] |
Characteristics | |
Spectral type | K0 IV[3] |
U−B color index | +0.903[4] |
B−V color index | +1.045[4] |
Astrometry | |
Radial velocity (Rv) | −43.5[2] km/s |
Proper motion (μ) | RA: −44.76[1] mas/yr Dec.: −185.66[1] mas/yr |
Parallax (π) | 41.72 ± 0.16 mas[1] |
Distance | 78.2 ± 0.3 ly (23.97 ± 0.09 pc) |
Absolute magnitude (MV) | 1.07±0.008[5] |
Details[6] | |
Mass | 2.6[7] M☉ |
Radius | 11.234±0.181 R☉ |
Luminosity | 58.79±2.61 L☉ |
Surface gravity (log g) | 2.66±0.10 cgs |
Temperature | 4,768±36 K |
Metallicity [Fe/H] | −0.11±0.03 dex |
Rotational velocity (v sin i) | 3.81 km/s |
Other designations | |
Database references | |
SIMBAD | data |
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