Astronomy:HD 156411

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Short description: Star in the constellation Ara
HD 156411 / Inquill
Observation data
Equinox J2000.0]] (ICRS)
Constellation Ara[1]
Right ascension  17h 19m 51.40072s[2]
Declination −48° 32′ 57.5600″[2]
Apparent magnitude (V) 6.67[1]
Characteristics
Evolutionary stage subgiant[2]
Spectral type G1V(w)[3]
Apparent magnitude (B) 7.284[1]
Apparent magnitude (J) 5.563±0.018[1]
Apparent magnitude (H) 5.241±0.031[1]
Apparent magnitude (K) 5.170±0.021[1]
B−V color index 0.614±0.008[1]
Astrometry
Radial velocity (Rv)−38.84±0.12[2] km/s
Proper motion (μ) RA: −33.443[2] mas/yr
Dec.: −211.177[2] mas/yr
Parallax (π)17.9656 ± 0.0212[2] mas
Distance181.5 ± 0.2 ly
(55.66 ± 0.07 pc)
Absolute magnitude (MV)2.976[4]
Details
Mass1.24±0.03[5] M☉
Radius2.15±0.11[5] R☉
Luminosity5.38[4] L☉
Surface gravity (log g)4.03±0.03[5] cgs
Temperature5,908±16[5] K
Metallicity [Fe/H]−0.12±0.02[5] dex
Rotation27.15 days[6]
Rotational velocity (v sin i)1.84±0.23[5] km/s
Age4.28±0.42[5] Gyr
Other designations
Inquill, CD−48°11605, HD 156411, HIP 84787, SAO 227825, PPM 322823, NLTT 44550[7]
Database references
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia		data

HD 156411 is a 7th magnitude G-type subgiant star located approximately 182 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] 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.[8][9]

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 — —

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A  XHIP record for this object at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  3. ↑ Houk, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars. 2. Ann Arbor: Dept. of Astronomy, University of Michigan. Bibcode: 1978mcts.book.....H. 
  4. ↑ 4.0 4.1 4.2 4.3 4.4 Naef, Dominique; Mayor, Michel; Lo Curto, Gaspare; Bouchy, François; Lovis, Christophe; Moutou, Claire; Benz, Willy; Pepe, Francesco et al. (2010). "The HARPS Search for Southern Extrasolar Planets XXIII. 8 Planetary Companions to Low-activity Solar-type Stars". Astronomy and Astrophysics 523: A15. doi:10.1051/0004-6361/200913616. Bibcode: 2010A&A...523A..15N. http://www.aanda.org/articles/aa/full_html/2010/15/aa13616-09/aa13616-09.html. 
  5. ↑ 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 Jofré, E. et al. (2015). "Stellar parameters and chemical abundances of 223 evolved stars with and without planets". Astronomy & Astrophysics 574: A50. doi:10.1051/0004-6361/201424474. Bibcode: 2015A&A...574A..50J. 
  6. ↑ Llorente De Andrés, F.; de la Reza, R.; Cruz, P.; Cuenda-Muñoz, D.; Alfaro, E. J.; Chavero, C.; Cifuentes, C. (2024). "The evolution of lithium in FGK dwarf stars. Influence of planets and Galactic migration". Astronomy and Astrophysics 684. doi:10.1051/0004-6361/202346744. Bibcode: 2024A&A...684A..28L. 
  7. ↑ "HD 156411". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+156411. 
  8. ↑ "Approved names" (in en). International Astronomical Union. http://www.nameexoworlds.iau.org/final-results. 
  9. ↑ "International Astronomical Union | IAU". https://www.iau.org/news/pressreleases/detail/iau1912/. 

Coordinates: Sky map 17h 19m 51.3992s, −48° 32′ 57.548″



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