16 Librae

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]

16 Librae

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
16 Lib, BD−03°3696, FK5 3177, GJ 9503, HD 132052, HIP 73165, HR 5570, SAO 140240, WDS J14572-0421A[9]
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]