14 Herculis c

Extrasolar planet in the constellation Hercules 14 Herculis c File:14 Herculis c (NIRCam).png Direct image of 14 Herculis c taken with the James Webb Space Telescope. Its host star is blocked by a coronagraph. Goździewski et al.; Rosenthal et al. Observatoire de Haute-Provence, Keck & AFP 17 November 2005 (candidate)2 July 2021 (confirmed) Doppler spectroscopy yes HD 145675 c astron 28.1 6.4 6.8 AU 0.64 0.06 0.10 52160 1030 commas days(142.8 2.8 years) 111.9 5.4 5.5 deg 205.1 7.448 10.31 deg 2451779 33 commas JD 172.5 4.011 4.584 deg 50.8 0.4 m/s 14 Herculis 7.9 1.6 1.2 Jupiter mass 1.03 0.01 Jupiter radius 275 K C F in 4.25 0.15 cgs 14 Herculis c or 14 Her c is the outermost of two known exoplanets orbiting the star 14 Herculis, approximately 58.4 light-years away in the constellation of Hercules. The planet has a mass that would make it a gas giant roughly the same size as Jupiter but much more massive. Discovery 14 Herculis c was discovered by the radial velocity method. Its discovery was first reported in 2005 (published in 2006), using data from the ELODIE Planet Search survey. It remained a planet candidate until its existence was securely confirmed in 2021. According to a 2007 analysis, the existence of a second planet in the 14 Herculis system was "clearly" supported by the evidence, but the planet's parameters were not precisely known. It may be in a 4:1 resonance with the inner planet 14 Herculis b. The inclination and true mass of 14 Herculis c were measured in 2021, using data from Gaia, and refined by further astrometric studies in 2022 and 2023, as well by a 2025 study using James Webb Space Telescope astrometry. The inclination is 116°, corresponding to a true mass of 7.1 y. Direct imaging The planet was directly imaged with the James Webb Space Telescope's NIRCam instrument in 2025. The observations determined a temperature of 275 K C in, making it one of the coldest exoplanets directly imaged. They also re-measured its orbital elements, finding it to be closer to the star, at around 15 AU, on a highly eccentric orbit, as well as measuring its orbital inclination, finding it to be misaligned with 14 Herculis b by 40°. At wavelengths of 4.4 μm, its apparent magnitude is fainter than expected, hinting at disequilibrium chemistry and/or water ice clouds.Frigid Exoplanet in Strange Orbit Imaged by NASA's Webb https://webbtelescope.org/contents/news-releases/2025/news-2025-125 2025-06-10 Webb en See also Epsilon Eridani b Epsilon Indi Ab HD 222237 References 2006ApJ...645..688G Goździewski, K. Konacki, M. Maciejewski, A. J. 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 2006 10.1086/504030 astro-ph/0511463 15012577 http://authors.library.caltech.edu/5547/1/GOZapj06.pdf 2007ApJ...654..625W Wittenmyer, R. A. Endl, M. Cochran, W. D. Long-Period Objects in the Extrasolar Planetary Systems 47 Ursae Majoris and 14 Herculis The Astrophysical Journal 654 1 625–632 2007 10.1086/509110 astro-ph/0609117 14707902 2105.11583 2021 The California Legacy Survey. I. A Catalog of 178 Planets from Precision Radial Velocity Monitoring of 719 Nearby Stars over Three Decades 10.3847/1538-4365/abe23c Rosenthal Lee J. Fulton Benjamin J. Hirsch Lea A. Isaacson Howard T. Howard Andrew W. Dedrick Cayla M. Sherstyuk Ilya A. Blunt Sarah C. Petigura Erik A. Knutson Heather A. Behmard Aida Chontos Ashley Crepp Justin R. Crossfield Ian J. M. Dalba Paul A. Fischer Debra A. Henry Gregory W. Kane Stephen R. Kosiarek Molly Marcy Geoffrey W. Rubenzahl Ryan A. Weiss Lauren M. Wright Jason T. The Astrophysical Journal Supplement Series 255 1 8 2021ApJS..255....8R 235186973 free Bardalez Gagliuffi Daniella C. Faherty Jacqueline K. Li Yiting Brandt Timothy D. Williams Lauryn Brandt G. Mirek Gelino Christopher R. 1 14 Her: A Likely Case of Planet–Planet Scattering The Astrophysical Journal Letters 1 December 2021 922 2 L43 2111.06004 2021ApJ...922L..43B free 10.3847/2041-8213/ac382c free Feng Fabo Butler R. Paul etal August 2022 3D Selection of 167 Substellar Companions to Nearby Stars The Astrophysical Journal Supplement Series 262 21 21 10.3847/1538-4365/ac7e57 2208.12720 2022ApJS..262...21F 251864022 free Benedict G. F. McArthur B. E. etal May 2023 The 14 Her Planetary System: Companion Masses and Architecture from Radial Velocities and Astrometry The Astronomical Journal 166 1 27 10.3847/1538-3881/acd93a 2305.11753 2023AJ....166...27B free Bardalez Gagliuffi Daniella Balmer William O. etal June 2025 JWST Coronagraphic Images of 14 Her c: a Cold Giant Planet in a Dynamically Hot, Multi-planet System The Astrophysical Journal Letters 988 L18 10.3847/2041-8213/ade30f free 2506.09201 2025ApJ...988L..18B 2506.13580 Xiao Guang-Yao Feng Fabo Updated Mutual Inclination Measurement for 14 Her b and C Research Notes of the AAS 2025 9 7 187 10.3847/2515-5172/adef49 2025RNAAS...9..187X free Naef D. Mayor M. Beuzit J. L. Perrier C. Queloz D. Sivan J. P. Udry S. January 2004 The ELODIE survey for northern extra-solar planets. III. Three planetary candidates detected with ELODIE https://ui.adsabs.harvard.edu/abs/2004A&A...414..351N/abstract Astronomy and Astrophysics en 414 351–359 astro-ph/0310261 2004A&A...414..351N 10.1051/0004-6361:20034091 free 0004-6361 External links https://exoplanet.eu/catalog/14_her_c--309/ Notes for Planet 14 Her c Jean Schneider 2011 Extrasolar Planets Encyclopaedia 30 September 2011 http://www.solstation.com/stars2/14her.htm 14 Herculis 2008-06-25 SolStation https://web.archive.org/web/20080719164703/http://www.solstation.com/stars2/14her.htm 19 July 2008 16 10 23.59 + 43 49 18.2 59 Category:Hercules (constellation) Category:Giant planets Category:Exoplanets discovered in 2005 Category:Exoplanets detected by radial velocity Category:Exoplanets detected by astrometry Category:Exoplanets detected by direct imaging