HD 156411

HD 156411 / Inquill
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Ara
Right ascension 17h 19m 51.40032s[1]
Declination –48° 32′ 57.5538″[1]
Apparent magnitude (V) 6.67[2]
Characteristics
Spectral type G1V(w)[3]
Apparent magnitude (B) 7.284[2]
Apparent magnitude (J) 5.563±0.018[2]
Apparent magnitude (H) 5.241±0.031[2]
Apparent magnitude (K) 5.170±0.021[2]
B−V color index 0.614±0.008[2]
Astrometry
Radial velocity (Rv)−38.76±0.18[1] km/s
Proper motion (μ) RA: −33.184[1] mas/yr
Dec.: −211.549[1] mas/yr
Parallax (π)17.5567 ± 0.0559 mas[1]
Distance185.8 ± 0.6 ly
(57.0 ± 0.2 pc)
Absolute magnitude (MV)2.976[4]
Details[5]
Mass1.24±0.03 M☉
Radius2.15±0.11 R☉
Luminosity5.38[4] L☉
Surface gravity (log g)4.03±0.03 cgs
Temperature5,908±16 K
Metallicity [Fe/H]−0.12±0.02 dex
Rotational velocity (v sin i)1.84±0.23 km/s
Age4.28±0.42 Gyr
Other designations
Inquill, CD–48°11605, HD 156411, HIP 84787, SAO 227825, PPM 322823, NLTT 44550[6]
Database references
SIMBADdata
Exoplanet Archivedata

HD 156411 is a 7th magnitude G-type main-sequence star located approximately 186 light years away in the southern constellation Ara. This star is larger, hotter, brighter, and more massive than the Sun. Its metal content is three-fourths as much as the Sun. The star is around 4.3 billion years old and is spinning with a projected rotational velocity of 1.8 km/s.[5] Naef and associates (2010) noted the star appears to be slightly evolved,[4] and thus may be in the process of leaving the main sequence. In 2009, a gas giant planet was found in orbit around the star.[4]

The star HD 156411 is named Inquill. The name was selected in the NameExoWorlds campaign by Peru, during the 100th anniversary of the IAU. Inquil was one half of the couple involved in the tragic love story Way to the Sun by Abraham Valdelomar.[7][8]

The HD 156411 planetary system[4]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b / Sumajmajta ≥ 0.74+0.05
−0.04 MJ 		1.88+0.03
−0.04 		842.2±14.5 0.22±0.08 — —

See also

References

  1. ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. ^ a b c d e f 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.
  3. ^ Houk, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 2. Ann Arbor: Dept. of Astronomy, University of Michigan. Bibcode:1978mcts.book.....H.
  4. ^ a b c d e Naef, Dominique; Mayor, Michel; Lo Curto, Gaspare; Bouchy, François; Lovis, Christophe; Moutou, Claire; Benz, Willy; Pepe, Francesco; Queloz, Didier; Santos, Nuno C.; Ségransan, Damien; Udry, Stéphane; Bonfils, Xavier; Delfosse, Xavier; Forveille, Thierry; Hébrard, Guillaume; Mordasini, Christoph; Perrier, Christian; Boisse, Isabelle; Sosnowska, Danuta (2010). "The HARPS Search for Southern Extrasolar Planets XXIII. 8 Planetary Companions to Low-activity Solar-type Stars". Astronomy and Astrophysics. 523: A15. arXiv:1008.4600. Bibcode:2010A&A...523A..15N. doi:10.1051/0004-6361/200913616. S2CID 118845989.
  5. ^ a b Jofré, E.; et al. (2015). "Stellar parameters and chemical abundances of 223 evolved stars with and without planets". Astronomy & Astrophysics. 574: A50. arXiv:1410.6422. Bibcode:2015A&A...574A..50J. doi:10.1051/0004-6361/201424474. S2CID 53666931.
  6. ^ "HD 156411". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-03-31.
  7. ^ "Approved names". NameExoworlds. International Astronomical Union. Retrieved 2020-01-02.
  8. ^ "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.


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