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HIP 5158 is a 10th magnitude K-type main-sequence star located approximately 169 light years away in the constellation Cetus. This star is smaller, cooler, fainter, and less massive than the Sun, but it is more metal rich, having concentration of heavy elements equal to 125% of solar abundance.

HIP 5158
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cetus
Right ascension 01h 06m 02.049s[1]
Declination –22° 27′ 11.35″[1]
Apparent magnitude (V) 10.16[2]
Characteristics
Spectral type K5V
Apparent magnitude (B) 11.238[2]
B−V color index 1.078±0.001[2]
Astrometry
Radial velocity (Rv)15.28±0.23[1] km/s
Proper motion (μ) RA: 203.899±0.087[1] mas/yr
Dec.: -106.761±0.065[1] mas/yr
Parallax (π)19.3500 ± 0.0388 mas[1]
Distance168.6 ± 0.3 ly
(51.7 ± 0.1 pc)
Absolute magnitude (MV)7.11[2]
Details
Mass0.780 ± 0.021[3] M☉
Radius0.71 ± 0.12 R☉
Luminosity0.11[3] L☉
Surface gravity (log g)4.37 ± 0.20[3] cgs
Temperature4,962±89[3] K
Metallicity [Fe/H]0.10 ± 0.07[3] dex
Age4.9 ± 3.7[4] Gyr
Rotation1.57☉
(42.3 days)[3]
Other designations
CD–23°395, HIP 5158, SAO 166798, PPM 243575, LTT 617, NLTT 3632, 2MASS J01060202-2227111[5]
Database references
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia		data

Planetary system


In 2009, a gas giant planet was found in orbit around the star. The quadratic drift in the radial velocities did indicate the presence of an additional outer planet in the system,[3] which was confirmed in 2011 as brown dwarf HIP 5158 c.[6]

The HIP 5158 planetary system[3][6]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b ≥1.42 MJ 0.89 345.72 ± 5.37 0.52 ± 0.08 — —
c ≥15.04 MJ 7.7±1.88 9018±3181 0.14±0.1 — —

See also



References


  1. 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. 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. Lo Curto, G.; et al. (2015). "The HARPS search for southern extra-solar planets. XXII. Multiple planet systems from the HARPS volume limited sample". Astronomy and Astrophysics. 512. A48. arXiv:1411.7048. Bibcode:2010A&A...512A..48L. doi:10.1051/0004-6361/200913523.
  4. Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951. S2CID 54555839.
  5. "CD-23 395". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-11-10.
  6. Feroz, F.; et al. (2011). "Bayesian evidence for two companions orbiting HIP 5158". Monthly Notices of the Royal Astronomical Society: Letters. 416: L104–L108. arXiv:1105.1150. Bibcode:2011MNRAS.416L.104F. doi:10.1111/j.1745-3933.2011.01109.x. S2CID 118517956.

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На других языках

- [en] HIP 5158

[ru] HIP 5158

HIP 5158 — звезда находящаяся в созвездии Китана расстоянии 130 световых лет от нас. Вокруг звезды обращаются как минимум две планеты


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