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HD 149143

Star in the constellation Ophiuchus

Star in the constellation Ophiuchus

| b-v = 0.680 | u-b =

HD 149143, also called Rosalíadecastro, is a star with a close orbiting exoplanet in the Ophiuchus constellation. Its apparent visual magnitude is 7.89 (a binocular object) and the absolute magnitude is 3.87. The system is located at a distance of 239 light years from the Sun based on parallax measurements, and it is drifting further away with a radial velocity of 12 km/s.

On December 17, 2019, as part of the IAU's NameExoWorlds project, the star HD 149143 was given the name Rosalíadecastro in honour of the Galician poet Rosalía de Castro, who was a significant figure of Galician culture and prominent writer in Galician overall, but in Spanish too, whose work often referenced the night and celestial objects. The exoplanet companion was named Riosar in honour of the Sar River in Galicia that was present in much of the literary work of the author Rosalía de Castro.

This is a slightly evolved star with a stellar classification of G0 that is overluminous for a high-metallicity G-type dwarf. It has 1.1 times the mass of the Sun and 1.3 times the Sun's radius. The star has an estimated age of around 7.6 billion years and is spinning with a projected rotational velocity of 3.9 km/s. It is radiating 2.3 times the luminosity of the Sun from its photosphere at an effective temperature of 6,213 K.

Planetary system

HD 149143 b, the planet that orbits HD 149143, was discovered by the N2K Consortium during their search for short-period gas giant planets around metal-rich stars. The planet was independently discovered by the Elodie metallicity-biased search for transiting Hot Jupiters.

References

| display-authors=1 | journal=Astronomy and Astrophysics

References

  1. {{Cite Gaia DR3. 4432401099808805888
  2. (2006). "Elodie metallicity-biased search for transiting Hot Jupiters I. Two Hot Jupiters orbiting the slightly evolved stars HD118203 and HD149143". Astronomy and Astrophysics.
  3. (2006). "The N2K Consortium. III. Short-Period Planets Orbiting HD 149143 and HD 109749". The Astrophysical Journal.
  4. {{Cite Gaia DR2. 4432401099808805888
  5. (2018). "Radial Velocities from the N2K Project: Six New Cold Gas Giant Planets Orbiting HD 55696, HD 98736, HD 148164, HD 203473, and HD 211810". The Astronomical Journal.
  6. "Approved names".
  7. "IAU Catalog of Star Names".
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