HD 120084

HD 120084
Observation data
Epoch 2000      Equinox 2000
Constellation Ursa Minor
Right ascension 13h 42m 39.20186s
Declination +78° 03 51.9756
Apparent magnitude (V) 5.910
Distance328.29 ly
(100.70 pc)
Spectral typeG7III
Other designations
HIP 66903
Database references
SIMBADdata
Extrasolar Planets
Encyclopaedia
data

HD 120084 is a star in the constellation of Ursa Minor. With an apparent magnitude of 5.91,[1] it is just visible to the naked eye in suburban skies.[2]

It is a yellow giant of spectral type G7III and surface temperature of around 4892 K, around 2.4 times the mass, 43 times the luminosity and 9 times the radius of our Sun. A planet with 4.5 times the mass of Jupiter and a highly eccentric orbit (with an eccentricity of 0.66) was discovered by precisely measuring the radial velocity of the star in 2013. With an average distance of 4.5 AU from its star, this planet has one of the most eccentric orbits discovered.[1]

References

  1. 1 2 Sato, Bun'ei; Omiya, Masashi; Harakawa, Hiroki; Liu, Yu-Juan; Izumiura, Hideyuki; Kambe, Eiji; Takeda, Yoichi; Yoshida, Michitoshi; Itoh, Yoichi; Ando, Hiroyasu; Kokubo, Eiichiro; Ida, Shigeru (2013). "Planetary Companions to Three Evolved Intermediate-Mass Stars: HD 2952, HD 120084, and omega Serpentis". Publ. Astron. Soc. Japan: 1–15.
  2. Bortle, John E. (February 2001). "The Bortle Dark-Sky Scale". Sky & Telescope. Sky Publishing Corporation. Retrieved 2013-02-20.


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