• Source: HD 65216

      • HD 65216 is a triple star system with two exoplanetary companions in the southern constellation of Carina. With an apparent visual magnitude of 7.97 it cannot be readily seen without technical aid, but with binoculars or telescope it should be visible. The system is located at a distance of 114.7 light-years from the Sun based on parallax measurements, and is drifting further away with a radial velocity of 42.6 km/s.
      The primary, component A, is an ordinary G-type main-sequence star with a stellar classification of G5V. It is nearly two billion years old and is spinning with a projected rotational velocity of 1.3 km/s. The star has 95% of the mass and 86% of the radius of the Sun. It is radiating 72% of the luminosity of the Sun from its photosphere at an effective temperature of 5,718 K.
      In 2008 a co-moving binary system of low mass companions were discovered at an angular separation of 7″ from the primary, which is equivalent to a projected separation of 253 AU at the distance of HD 65216. Component B is of class M7–8 (0.089 M☉) while component C is class L2–3 (0.078 M☉); both have a mass close to the sub-stellar limit. The pair have a projected separation of 6 AU from each other.


      Planetary system


      An extrasolar planet (designated as HD 65216 b) was discovered orbiting the primary in 2003. A second much more distant planet was suspected since 2013, but was discovered on a completely different orbit in 2019.


      See also


      List of extrasolar planets


      References




      External links


      "Notes for star HD 65216". Extrasolar Planets Encyclopaedia. Archived from the original on July 2, 2007. Retrieved 2008-08-22.

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