HD 180314

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HD 180314
Observation data
Epoch J2000      Equinox J2000
Constellation Lyra
Right ascension 19h 14m 50.2087s[1]
Declination +31° 51′ 37.263″[1]
Apparent magnitude (V) 6.61[2]
Characteristics
Spectral type K0[2]
B−V color index +1.000[2]
Astrometry
Radial velocity (Rv)−73.87 ± 0.20[3] km/s
Proper motion (μ) RA: 47.19[4] mas/yr
Dec.: 19.71[4] mas/yr
Parallax (π)8.24 ± 0.28[4] mas
Distance400 ± 10 ly
(121 ± 4 pc)
Absolute magnitude (MV)0.931[2]
Details[3]
Mass2.48 ± 0.08 M☉
Radius8.10 ± 0.45 R☉
Luminosity43.7 L☉
Surface gravity (log g)3.06 ± 0.10 cgs
Temperature4997 ± 30 K
Metallicity [Fe/H]0.22 ± 0.04 dex
Age0.60 ± 0.05 Gyr
Other designations
BD+31° 3514, HD 180314, HIP 94576, SAO 68027[5]
Database references
SIMBADdata

HD 180314 is a star in the constellation Lyra. Its apparent magnitude is 6.61[2] and it is about 400 light years from the Sun. This is a K-type star[2] with 2.48 times the mass of the Sun, 8.10 times the Sun's radius, and an effective temperature of about 5,000 K.[3]

The star is orbited by one substellar companion, HD 180314 b,[5] an object with a minimum mass 22 times that of Jupiter and hence likely to be a brown dwarf.[2] It orbits HD 180314 every 396 days with a semi-major axis of 1.4 AU. HD 180314 b's orbit is moderately eccentric, with an orbital eccentricity of 0.257.[6]

The HD 180314 planetary system[2]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b >22 MJ 1.4 396.03 ± 0.62 0.257 ± 0.010 — —

References[]

  1. ^ a b Gaia Collaboration (2016). "Gaia Data Release 1". Astronomy & Astrophysics. 595: A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512. S2CID 1828208.
  2. ^ a b c d e f g h Sato, Bun'ei; Omiya, Masashi; Liu, Yujuan; Harakawa, Hiroki; Izumiura, Hideyuki; Kambe, Eiji; Toyota, Eri; Murata, Daisuke; Lee, Byeong-Cheol; Masuda, Seiji; Takeda, Yoichi; Yoshida, Michitoshi; Itoh, Yoichi; Ando, Hiroyasu; Kokubo, Eiichiro; Ida, Shigeru; Zhao, Gang; Han, Inwoo (2010). "Substellar Companions to Evolved Intermediate-Mass Stars: HD 145457 and HD 180314". Publications of the Astronomical Society of Japan. 62 (4): 1063–69. arXiv:1005.2860. Bibcode:2010PASJ...62.1063S. doi:10.1093/pasj/62.4.1063. S2CID 119113950.
  3. ^ a b c Maldonado, J.; Villaver, E.; Eiroa, C. (2013). "The metallicity signature of evolved stars with planets". Astronomy & Astrophysics. 554: 2013. arXiv:1303.3418. Bibcode:2013A&A...554A..84M. doi:10.1051/0004-6361/201321082. S2CID 119289111.
  4. ^ a b c van Leeuwen, F.; et al. (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.
  5. ^ a b "HD 180314". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 22 February 2014.
  6. ^ "Planet HD 180314 b". The Extrasolar Planets Encyclopaedia. Retrieved 1 January 2016.


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