HD 204313
A G5V star with two confirmed exoplanets and a disputed third.
HD 204313 is a G-type main-sequence star in the southern constellation of Capricornus, too faint to be seen without optical aid. It hosts at least two confirmed exoplanets, with a third candidate companion that remains disputed.
Quick Facts
- Constellation
- Capricornus
- Apparent magnitude
- 7.99
- Distance
- 157 light years
- Spectral type
- G5V
- Mass
- slightly larger than the Sun
- Luminosity
- 118% of the Sun
Facts from the source article.
Planetary system
The star was monitored by the CORALIE radial velocity program from 2000. A superjovian planet was announced in August 2009, followed in 2011 by a hot Neptune on a 35-day orbit. A third Jupiter-like candidate on a 2800-day orbit was proposed in 2012; if real, planets b and d may be near a 7:5 mean motion resonance. A 2015 study confirmed the first two planets but found no signal at the candidate's period, and a 2022 study agreed, instead identifying a new planet or brown dwarf designated HD 204313 e. Astrometry has measured the inclination and true mass of planets b and e.
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