HD 52265 b

HD 52265 b / Cayahuanca
Discovery[1][2][3]
Discovered byButler et al. and Naef et al.
Discovery siteKeck Observatory and La Silla Observatory
Discovery date2000
Doppler spectroscopy
Orbital characteristics[4]
0.520±0.009 AU
Eccentricity0.27±0.02
119.27±0.02 d
242±3 º
Semi-amplitude42.97±0.70 m/s
StarHD 52265
Physical characteristics[4]
Mass≥1.21±0.05 MJ

HD 52265 b, formally named Cayahuanca, is a gas giant exoplanet located approximately 98 light-years away[5] in the constellation of Monoceros, orbiting the star HD 52265. The planet has a minimum mass slightly more than that of Jupiter. Mean distance between the planet and the star is half that of Earth from the Sun. It was discovered by both the California and Carnegie Planet Search team and the Geneva Extrasolar Planet Search team independently of each other.[1][2][3] By studying the fluctuations of the brightness of a host star, the inclination of the stars equator was determined. This allowed to calculate its true mass, assuming that the planet orbits in the plane of the star's equator.[6]

  1. ^ a b Cite error: The named reference Butler2000 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Naef2001 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference eso0019 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Wittenmyer2019 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Gaia DR2 was invoked but never defined (see the help page).
  6. ^ Wobbly, Sunlike Star Being Pulled by Giant Alien Planet, Charles Q. Choi