Astronomy:HIP 14810

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Short description: Star in the constellation Aries
HIP 14810
Observation data
Equinox J2000.0]] (ICRS)
Constellation Aries
Right ascension  03h 11m 14.2302s[1]
Declination +21° 05′ 50.4927″[1]
Apparent magnitude (V) 8.585±0.016[2]
Characteristics
Spectral type G6V[2]
B−V color index 0.777±0.021[3]
Astrometry
Radial velocity (Rv)−5.121±0.681[2] km/s
Proper motion (μ) RA: −3.784±0.087[1] mas/yr
Dec.: −53.154±0.070[1] mas/yr
Parallax (π)19.7810 ± 0.0449[1] mas
Distance164.9 ± 0.4 ly
(50.6 ± 0.1 pc)
Absolute magnitude (MV)4.89[3]
Details
Mass0.98±0.02 M☉[4] M☉
Radius1.08±0.03[4] R☉
Luminosity0.99±0.01[4] L☉
Surface gravity (log g)4.35±0.03[4] cgs
Temperature5,535±51[4] K
Metallicity [Fe/H]0.28±0.06[2] dex
Rotational velocity (v sin i)0.54±0.5[5] km/s
Age8.7±2.0 Gyr[4] Gyr
Other designations
BD+20° 518, HIP 14810, SAO 75776, PPM 92274, TYC 1231-1727-1, GSC 01231-01727[6]
Database references
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia		data

HIP 14810 is a star with three exoplanetary companions in the northern constellation of Aries. It positioned about 1.3° to the north of Delta Arietis,[7] but is too faint to be visible to the naked eye with an apparent visual magnitude of 8.6.[2] The system is located at a distance of 165 light-years from the Sun based on parallax measurements,[1] but is drifting closer with a radial velocity of −5 km/s.[2]

This is an ordinary G-type main-sequence star with a stellar classification of G6V.[2] It has a relatively low activity level and a low projected rotational velocity of 0.5 km/s, which indicates it is an old star with an age of around eight billion years.[5] The star has a high metallicity with a mass and luminosity about the same as the Sun.[4]

Planetary system

Orbiting the star are three confirmed planets. The discovery paper for HIP 14810 b and HIP 14810 c was published in 2007,[8] while that for HIP 14810 d was published in 2009, together with a revision for the orbital parameters for planet c.[5] Simulations suggest that the orbits of these planets do not allow a stable orbit for a hypothetical super-earth in the habitable zone.[9]

The HIP 14810 planetary system[10]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b ≥3.9±0.49 MJ 0.0696±0.0044 6.673892±0.000008 0.14399±0.00087 — —
c ≥1.31±0.18 MJ 0.549±0.034 147.747±0.029 0.1566±0.0099 — —
d ≥0.59±0.1 MJ 1.94±0.13 981.8±6.9 0.185±0.035 — —

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Grieves, N. et al. (December 2018). "Chemo-kinematics of the Milky Way from the SDSS-III MARVELS survey". Monthly Notices of the Royal Astronomical Society 481 (3): 3244–3265. doi:10.1093/mnras/sty2431. Bibcode: 2018MNRAS.481.3244G. 
  3. ↑ 3.0 3.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A. 
  4. ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 Bonfanti, A. et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics 575: A18. doi:10.1051/0004-6361/201424951. Bibcode: 2015A&A...575A..18B. http://www.aanda.org/articles/aa/full_html/2015/03/aa24951-14/aa24951-14.html. 
  5. ↑ 5.0 5.1 5.2 Wright, J. T. et al. (2009). "A Third Giant Planet Orbiting HIP 14810". The Astrophysical Journal Letters 699 (2): L97–L101. doi:10.1088/0004-637X/699/2/L97. Bibcode: 2009ApJ...699L..97W. 
  6. ↑ "BD+20 518". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=BD%2B20+518. 
  7. ↑ Sinnott, Roger W.; Perryman, Michael A. C. (1997). Millennium Star Atlas. 1. Sky Publishing Corporation and the European Space Agency. p. 189. ISBN 0-933346-84-0. 
  8. ↑ Wright, J. T. et al. (2007). "Four New Exoplanets and Hints of Additional Substellar Companions to Exoplanet Host Stars". The Astrophysical Journal 657 (1): 533–545. doi:10.1086/510553. Bibcode: 2007ApJ...657..533W. 
  9. ↑ Elser, S. et al. (August 2013). "Super-Earths and dynamical stability of planetary systems: first parallel GPU simulations using GENGA". Monthly Notices of the Royal Astronomical Society 433 (3): 2194–2205. doi:10.1093/mnras/stt883. Bibcode: 2013MNRAS.433.2194E. 
  10. ↑ Ment, Kristo et al. (2018). "Radial Velocities from the N2K Project: Six New Cold Gas Giant Planets Orbiting HD 55696, HD 98736, HD 148164, HD 203473, and HD 211810". The Astronomical Journal 156 (5): 213. doi:10.3847/1538-3881/aae1f5. Bibcode: 2018AJ....156..213M. 

External links

Coordinates: Sky map 03h 11m 14.2304s, +21° 05′ 50.491″



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