Star in the constellation Centaurus
HD 117207 is a star in the southern constellation Centaurus . With an apparent visual magnitude of 7.24,[ 2] it is too dim to be visible to the naked eye but can be seen with a small telescope. Based upon parallax measurements, it is located at a distance of 105.4 light-years (32.3 parsecs ) from the Sun . The star is drifting closer with a radial velocity of −17.4 km/s.[ 4] It has an absolute magnitude of 4.67.[ 4]
This object has a stellar classification of G7IV-V,[ 3] showing blended spectral traits of a G-type main-sequence star and an older, evolving subgiant star . It is around four[ 2] billion years old with 5%[ 7] greater mass than the Sun and a 7% larger radius.[ 5] The star is radiating 1.16 times the luminosity of the Sun from its photosphere at an effective temperature of 5,644 K.[ 5]
In 2005, a planet was found orbiting the star using the radial velocity method , and was designated HD 117207 b .[ 8] [ 9] The orbital elements of this planet were refined in 2018, showing an orbital period of 7.18 years, a semimajor axis of 3.79 AU , and an eccentricity of 0.16. The minimum mass of this object is nearly double that of Jupiter . If an inner planet is orbiting the star, it must have an orbital period no greater than 3.46 years to satisfy Hill's criteria for dynamic stability.[ 2] In 2023, the inclination and true mass of HD 117207 b were determined via astrometry .[ 10]
See also
References
^ a b c d Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties" . Astronomy and Astrophysics . 674 : A1. arXiv :2208.00211 . Bibcode :2023A&A...674A...1G . doi :10.1051/0004-6361/202243940 . S2CID 244398875 .
Gaia DR3 record for this source at VizieR .
^ a b c d e f g Barbato, D.; et al. (August 2018). "Exploring the realm of scaled solar system analogues with HARPS". Astronomy & Astrophysics . 615 : 21. arXiv :1804.08329 . Bibcode :2018A&A...615A.175B . doi :10.1051/0004-6361/201832791 . S2CID 119099721 . A175.
^ a b Gray, R. O.; et al. (July 2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Northern Sample I". The Astronomical Journal . 132 (1): 161– 170. arXiv :astro-ph/0603770 . Bibcode :2006AJ....132..161G . doi :10.1086/504637 . S2CID 119476992 .
^ a b c d 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 .
^ a b c 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 .
^ "HD 117207" . SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2018-07-23 .
^ Luck, R. Earle (March 2018). "Abundances in the Local Region. III. Southern F, G, and K Dwarfs" . The Astronomical Journal . 155 (3): 31. Bibcode :2018AJ....155..111L . doi :10.3847/1538-3881/aaa9b5 . S2CID 125765376 . 111.
^ Marcy, Geoffrey W.; et al. (2005). "Five New Extrasolar Planets". The Astrophysical Journal . 619 (1): 570– 584. Bibcode :2005ApJ...619..570M . CiteSeerX 10.1.1.516.6667 . doi :10.1086/426384 . S2CID 5803173 .
^ Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal . 646 (1): 505– 522. arXiv :astro-ph/0607493 . Bibcode :2006ApJ...646..505B . doi :10.1086/504701 . S2CID 119067572 .
^ a b Xiao, Guang-Yao; Liu, Yu-Juan; et al. (May 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics . 23 (5): 055022. arXiv :2303.12409 . Bibcode :2023RAA....23e5022X . doi :10.1088/1674-4527/accb7e .