HD 156411

HD 156411 is a 7th magnitude G-type main sequence star located approximately 179 light years away in the constellation Ara. This star is larger, hotter, brighter, and more massive than our Sun. Also its metal content is three-fourths as much as the Sun. In 2009, a gas giant planet was found in orbit around the star.[2]

HD 156411
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Ara
Right ascension 17h 19m 51.401s[1]
Declination –48° 32′ 57.54″[1]
Apparent magnitude (V) 6.67
Characteristics
Spectral type G1Vw
Apparent magnitude (B) 7.29
Apparent magnitude (J) 5.563
Apparent magnitude (H) 5.241
Apparent magnitude (K) 5.170
B−V color index 0.62
Astrometry
Radial velocity (Rv)–39.1 km/s
Proper motion (μ) RA: −33.71±0.59[1] mas/yr
Dec.: −209.35±0.29[1] mas/yr
Parallax (π)18.25 ± 0.49[1] mas
Distance179 ± 5 ly
(55 ± 1 pc)
Absolute magnitude (MV)2.96
Details
Mass1.11 M☉
Radius2.23±0.19 R☉
Luminosity5.317±0.551 L☉
Surface gravity (log g)3.83 cgs
Temperature5890±100 K
Metallicity-0.12
Other designations
Inquill, CD–48°11605, HIP 84787, NLTT 44550, PPM 322823, SAO 227825
Database references
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia		data

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.[3][4]

The HD 156411 planetary system[2]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b ≥ 0.74+0.05
−0.04 MJ		 1.88+0.03
−0.04		 842.2±14.5 0.22±0.08 — —

See also
  • List of extrasolar planets

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. Vizier catalog entry
  2. Naef, D.; 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. arXiv:1008.4600. Bibcode:2010A&A...523A..15N. doi:10.1051/0004-6361/200913616. S2CID 118845989.
  3. "Approved names". NameExoworlds. Retrieved 2020-01-02.
  4. "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.


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