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HD 167042 is a 6th magnitude K-type subgiant star located approximately 164 light-years away in Draco constellation. It has mass of 1.88 times that of the Sun and the age is only 1.8 billion years old. When this star was a main sequence, it was white mid to late A-type star based on its mass.

HD 167042
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Draco
Right ascension 18h 10m 31.64008s[1]
Declination +54° 17′ 11.5922″[1]
Apparent magnitude (V) +5.97[2]
Characteristics
Spectral type K1 IV[2]
U−B color index +0.716[3]
B−V color index +0.934[3]
Astrometry
Radial velocity (Rv)−17.88[4] km/s
Proper motion (μ) RA: +107.94[1] mas/yr
Dec.: +247.35[1] mas/yr
Parallax (π)19.91 ± 0.26 mas[1]
Distance164 ± 2 ly
(50.2 ± 0.7 pc)
Details[2]
Mass1.88±0.07 M☉
Radius5.70±0.10 R☉
Luminosity12.47±0.54 L☉
Surface gravity (log g)3.2±0.1 cgs
Temperature4,547±49 K
Metallicity [Fe/H]−0.1 dex
Rotational velocity (v sin i)0.68[4] km/s
Age1.82±5.23 Gyr
Other designations
BD+54° 1950, GC 24820, HD 167042, HIP 89017, HR 6817, SAO 30784, LTT 15382[5]
Database references
SIMBADdata

Planetary system


On 28 November 2007, a preprint of the discovery of the planet HD 167042 b was posted to the arXiv server. The peer reviewed paper was then published in The Astrophysical Journal on 1 March 2008.[6] The discovery was later independently confirmed.[7]

The HD 167042 planetary system[6]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b >1.7 MJ 1.30 412.6 ± 4 0.027 ± 0.04 — —

See also



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. Ligi, R.; et al. (February 2016), "Radii, masses, and ages of 18 bright stars using interferometry and new estimations of exoplanetary parameters", Astronomy & Astrophysics, 586: 23, arXiv:1511.03197, Bibcode:2016A&A...586A..94L, doi:10.1051/0004-6361/201527054, S2CID 15941645, A94.
  3. Jennens, P. A.; Helfer, H. L. (September 1975), "A new photometric metal abundance and luminosity calibration for field G and K giants", Monthly Notices of the Royal Astronomical Society, 172 (3): 667–679, Bibcode:1975MNRAS.172..667J, doi:10.1093/mnras/172.3.667.
  4. 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.
  5. "HD 167042". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-08-12.
  6. Johnson, John Asher; et al. (2008). "Retired A Stars and Their Companions. II. Jovian Planets Orbiting κ CrB and HD 167042". The Astrophysical Journal. 675 (1): 784–789. arXiv:0711.4367. Bibcode:2008ApJ...675..784J. doi:10.1086/526453. S2CID 12367629.
  7. Sato, Bun'ei; et al. (2008). "Planetary Companions to Evolved Intermediate-Mass Stars: 14 Andromedae, 81 Ceti, 6 Lyncis, and HD167042". Publications of the Astronomical Society of Japan. 60 (6): 1317–1326. arXiv:0807.0268. Bibcode:2008PASJ...60.1317S. doi:10.1093/pasj/60.6.1317. S2CID 67841762.



На других языках

[de] HD 167042

HD 167042 ist ein etwa 164 Lichtjahre von der Erde entfernter Riesenstern der Spektralklasse K1 im Sternbild Drache. Er besitzt eine scheinbare Helligkeit von 6,0 mag. Der Stern wird von einem Exoplaneten mit der Bezeichnung HD 167042 b umrundet.
- [en] HD 167042

[es] HD 167042

HD 167042 (HR 6817 / HIP 89047)[1] es una estrella en la constelación del Dragón. De magnitud aparente +5,95, está situada a 163 años luz de distancia del Sistema Solar. En 2007 se anunció el descubrimiento de un planeta extrasolar en órbita alrededor de esta estrella.


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