This was one of the systems selected to be named in the 2019 NameExoWorlds campaign during the 100th anniversary of the IAU, which assigned each country a star and planet to be named. This system was assigned to Brazil. The approved names were Tupi for the star and Guarani for planet b, named after the Tupi and Guarani indigenous peoples of Brazil.[10][11]
Planetary system
In October 2001, a giant planet orbiting the star was announced, detected by the radial velocity method.[12] The orbit of this object is similar to that of Mars, and the presence of such a large planet would have a strong impact on an Earth-like planet in the habitable zone of this Star.[9] Any Earthlike planet would have to exist either as an exomoon or Trojan planet of HD 23079 b.
With additional observations, the discovery of a second planet, HD 23079 c, was announced in 2025. This is a sub-Neptune mass planet orbiting closer to the star, with a period of only 5.75 days.[6]
1234Delisle, J.-B.; Faria, J. P.; etal. (September 2025). "Architecture of planetary systems with and without outer giant planets I. Inner planet detections around HD 23079, HD 196067, and HD 86226". Astronomy & Astrophysics. arXiv:2509.26232.
