HD 204313 b
Discovery
Discovered bySegransan et al.
Discovery siteLa Silla Observatory
Discovery dateAugust 11, 2009
Radial velocity (CORALIE)
Orbital characteristics[1]
3.185+0.130
−0.143 AU
Eccentricity0.100±0.003
5.588 ± 0.005 years (2,041.0 ± 1.8 d)
Inclination72.917°+31.372°
−21.476°
176.845°+118.200°
−71.383°
2449883.770+11.374
−10.368
286.990°+1.625°
−1.784°
Semi-amplitude69.433+0.308
−0.323 m/s
StarHD 204313
Physical characteristics[1]
Mass4.615+1.290
−0.306 MJ

    HD 204313 b is an extrasolar planet which orbits the G-type main sequence star HD 204313, located approximately 155 light years away in the constellation Capricorn. This planet orbits the star at a distance of 3.082 astronomical units and takes 1931 days or 5.29 years to revolve around the star. It has a minimum mass four times that of Jupiter. However the radius is not known since this planet was not detected by the transit method or direct imaging. Instead, this planet was detected by the radial velocity method using the CORALIE Echelle spectrograph mounted on the 1.2 meter Euler Swiss Telescope located at La Silla Observatory in Atacama desert, Chile on August 11, 2009.[2]

    The planet's existence was independently confirmed in 2015,[3] and in 2022 its inclination and true mass were measured via astrometry.[1]

    References

    1. 1 2 3 Feng, Fabo; Butler, R. Paul; et al. (August 2022). "3D Selection of 167 Substellar Companions to Nearby Stars". The Astrophysical Journal Supplement Series. 262 (21): 21. arXiv:2208.12720. Bibcode:2022ApJS..262...21F. doi:10.3847/1538-4365/ac7e57. S2CID 251864022.
    2. ↑ Segransan; et al. (February 2010). "The CORALIE survey for southern extrasolar planets. XVI. Discovery of a planetary system around HD 147018 and of two long period and massive planets orbiting HD 171238 and HD 204313". Astronomy & Astrophysics. 511. article A45. arXiv:0908.1479. Bibcode:2010A&A...511A..45S. doi:10.1051/0004-6361/200912136. S2CID 8864844.
    3. ↑ Díaz, R. F.; et al. (2016). "The HARPS search for southern extra-solar planets. XXXVIII. Bayesian re-analysis of three systems. New super-Earths, unconfirmed signals, and magnetic cycles". Astronomy and Astrophysics. 585. A134. arXiv:1510.06446. Bibcode:2016A&A...585A.134D. doi:10.1051/0004-6361/201526729. S2CID 118531921.
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