14 Herculis

From the Science Archives, the open-project database of science information
Jump to navigation Jump to search
14 Herculis
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Hercules
Right ascension 16h 10m 24.31s[1]
Declination +43° 49′ 03.5″[1]
Apparent magnitude (V) +6.61[2]
Characteristics
Spectral type K0 V[3]
B−V color index 0.877±0.006[2]
Astrometry
Radial velocity (Rv)−13.87±0.08[2] km/s
Proper motion (μ) RA: +131.83±0.32[1] mas/yr
Dec.: −297.54±0.36[1] mas/yr
Parallax (π)56.91 ± 0.34[1] mas
Distance57.3 ± 0.3 ly
(17.6 ± 0.1 pc)
Absolute magnitude (MV)+5.39[2]
Details
Mass0.9[4] M
Radius0.8668±0.0324[5] R
Diameter0.8668±0.0324[5] D
Luminosity0.6256±0.0077[5] L
Surface gravity (log g)4.42[6] cgs
Temperature5518±102[5] K
Metallicity [Fe/H]0.43±0.08[4] dex
Age3.6±2.0[7] Gyr
Other designations
14 Her, BD+44° 2549, GJ 614, HD 145675, HIP 79248, SAO 45933, LTT 14816[8]
Database references
SIMBADdata

14 Herculis or 14 Her is the Flamsteed designation of a K-type main-sequence star approximately 57 light-years away in the constellation Hercules. Because of its apparent magnitude, the star cannot be seen with the naked eye. As of 2006, it is thought that 14 Herculis has two extrasolar planets in orbit around the star.

Stellar components[edit]

14 Herculis is an orange dwarf star of the spectral type K0V. It is thought that the star has 90 percent of the mass, 71 percent of the radius, and only 36 percent of the luminosity of the Sun. The star appears to be 2.7 times as enriched with elements heavier than hydrogen (based on its abundance of iron), in comparison to the Sun.

Planetary system[edit]

In 1998 a planet was discovered orbiting 14 Herculis.[9] The planet's eccentric orbital period is 4.8 years.[4] In 2005, a possible second planet was proposed, designated 14 Herculis c.[10] The parameters of this planet are uncertain, but a recent analysis suggests it may lie in the 4:1 resonance with the inner planet, with an orbital period of almost 19 years at an orbital distance of 6.9 AU.[4]

The 14 Herculis planetary system[4]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b ≥4.64 ± 0.19 MJ 2.77 ± 0.05 1773.4 ± 2.5 0.369 ± 0.005
c ≥2.1 MJ 6.9 6906 ± 70 0 (fixed)

See also[edit]

References[edit]

  1. 1.0 1.1 1.2 1.3 1.4 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. http://www.aanda.org/articles/aa/full/2007/41/aa8357-07/aa8357-07.html. Vizier catalog entry
  2. 2.0 2.1 2.2 2.3 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.
  3. Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series 71: 245, Bibcode 1989ApJS...71..245K, doi:10.1086/191373.
  4. 4.0 4.1 4.2 4.3 4.4 Wittenmyer, Robert A. et al. (January 2007). "Long-Period Objects in the Extrasolar Planetary Systems 47 Ursae Majoris and 14 Herculis". The Astrophysical Journal 654 (1): 625–632. arXiv:astro-ph/0609117. Bibcode 2007ApJ...654..625W. doi:10.1086/509110.
  5. 5.0 5.1 5.2 von Braun, Kaspar et al. (2014). "Stellar diameters and temperatures - V. 11 newly characterized exoplanet host stars". Monthly Notices of the Royal Astronomical Society 438 (3): 2413–2425. arXiv:1312.1792. Bibcode 2014MNRAS.438.2413V. doi:10.1093/mnras/stt2360.
  6. Santos, N. C. et al. (August 2013), "SWEET-Cat: A catalogue of parameters for Stars With ExoplanETs. I. New atmospheric parameters and masses for 48 stars with planets", Astronomy & Astrophysics 556: 11, arXiv:1307.0354, Bibcode 2013A&A...556A.150S, doi:10.1051/0004-6361/201321286, A150.
  7. Bonfanti, A. et al. (2015). "Revising the ages of planet-hosting stars". Astronomy & Astrophysics 575 (A18): 17. arXiv:1411.4302. Bibcode 2015A&A...575A..18B. doi:10.1051/0004-6361/201424951.
  8. Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).
  9. Lua error in Module:Citation/CS1 at line 637: attempt to concatenate local 'chapter' (a table value).
  10. Goździewski, K.; Konacki, M.; Maciejewski, A. J. (2006). "Orbital Configurations and Dynamical Stability of Multiplanet Systems around Sun-like Stars HD 202206, 14 Herculis, HD 37124, and HD 108874". The Astrophysical Journal 645 (1): 688–703. arXiv:astro-ph/0511463. Bibcode 2006ApJ...645..688G. doi:10.1086/504030. http://authors.library.caltech.edu/5547/1/GOZapj06.pdf.


Add your comment
The Science Archives welcomes all comments. If you do not want to be anonymous, register or log in. It is free.


As a reminder, article comments are only for discussions on how to improve the article. Please direct other comments to a user's talk page. Please be formal and do not use excessive uppercase. Please be advised you may receive an automatic block if you break the article comments policy. For information regarding what is acceptable/not acceptable in article comments, please message Icons-flag-ru.png Joey (talk), Natalia (talk), Icons-flag-fr.png ynoss (talk), or Icons-flag-ca.png Daniel (older account/talk).


External links[edit]

  • Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).
  • Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).
  • Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).

Template:14 Herculis