14 Sagittarii

14 Sagittarii is a single,^[6] orange-hued star in the southern zodiac constellation of Sagittarius. It is faintly visible to the naked eye under good seeing conditions, having an apparent visual magnitude of 5.49.^[2] Based upon an annual parallax shift of 7.20±0.41 mas,^[1] it is located some 450 light years away. The star is moving closer to the Sun with a heliocentric radial velocity of around −59 km/s.^[4] It should achieve perihelion in about two million years, approaching as close as 136.1 ly (41.72 pc).^[4]

14 Sagittarii

Observation data Epoch J2000      Equinox J2000
Constellation	Sagittarius
Right ascension	18h 14m 15.89989s[1]
Declination	−21° 42′ 47.3919″[1]
Apparent magnitude (V)	5.491[2]
Characteristics
Spectral type	K2 III[3]
B−V color index	1.528±0.001[4]
Astrometry
Radial velocity (Rv)	−58.9±2.8[4] km/s
Proper motion (μ)	RA: −16.27[1] mas/yr Dec.: −23.49[1] mas/yr
Parallax (π)	7.20 ± 0.41 mas[1]
Distance	450 ± 30 ly (139 ± 8 pc)
Absolute magnitude (MV)	−0.21[4]
Details
Luminosity	317.37[4] L☉
Surface gravity (log g)	1.7[2] cgs
Temperature	3,940[2] K
Metallicity [Fe/H]	−0.26[2] dex
Other designations
14 Sgr, NSV 10393, BD−21° 4916, HD 167036, HIP 89369, HR 6816, SAO 186509[5]
Database references
SIMBAD	data

This is an evolved giant star with a stellar classification of K2 III,^[3] having exhausted the supply of hydrogen at its core and moved off the main sequence. It is a suspected variable star, possibly of the micro-variable variety, having an amplitude of less than 0.03 in magnitude.^[4] 14 Sagittarii is radiating about 317^[4] times the Sun's luminosity from its photosphere at an effective temperature of around 3,940 K.^[2]

References

1. van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
2. Soubiran, C.; et al. (June 2010), "The PASTEL catalogue of stellar parameters", Astronomy and Astrophysics, 515: A111, arXiv:1004.1069, Bibcode:2010A&A...515A.111S, doi:10.1051/0004-6361/201014247, S2CID 118362423.
3. Houk, Nancy; Smith-Moore, M. (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 4, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1988mcts.book.....H.
4. Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
5. "14 Sgr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-03-15.
6. Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.