16 Librae
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 | |
| 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]