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Star in the constellation Libra From Wikipedia, the free encyclopedia
16 Librae is a star in the constellation Libra. It is a faint star but visible to the naked eye with an apparent visual magnitude of 4.49.[2] An annual parallax shift of 37.17[1] mas yields a distance estimate of 87.7 light years. It is moving further from the Sun with a radial velocity of +26 km/s.[4]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Libra |
Right ascension | 14h 57m 11.00009s[1] |
Declination | −04° 20′ 47.2547″[1] |
Apparent magnitude (V) | 4.49[2] |
Characteristics | |
Spectral type | F2 V[3] |
U−B color index | +0.05[2] |
B−V color index | +0.32[2] |
Astrometry | |
Radial velocity (Rv) | +26.3±0.6[4] km/s |
Proper motion (μ) | RA: −96.98[1] mas/yr Dec.: −153.40[1] mas/yr |
Parallax (π) | 37.17 ± 0.32 mas[1] |
Distance | 87.7 ± 0.8 ly (26.9 ± 0.2 pc) |
Absolute magnitude (MV) | 2.32[5] |
Details | |
16 Lib A | |
Mass | 1.47[6] M☉ |
Luminosity | 9.77[5] L☉ |
Surface gravity (log g) | 3.99[6] cgs |
Temperature | 7,187±244[6] K |
Metallicity [Fe/H] | −0.13[7] dex |
Rotational velocity (v sin i) | 113.3[8] km/s |
Age | 660[6] Myr |
Other designations | |
Database references | |
SIMBAD | data |
This is an ordinary F-type main-sequence star with a stellar classification of F2 V.[3] It is an estimated 660[6] million years old and is spinning rapidly with a projected rotational velocity of 113 km/s.[8] The star has 1.47[6] times the mass of the Sun and is radiating nearly 10[5] times the Sun's luminosity from its photosphere at an effective temperature of about 7,187 K.[6]
16 Librae has a common proper motion companion located at an angular separation of 22.8 arc seconds along a position angle of 297°, as of 1999. Designated component B, this is a red dwarf star with a class of about M6 and an infrared J-band magnitude of 12.19.[10]
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