YBP 1194

YBP 1194 is a G-type main-sequence star, class G5V, in the open cluster Messier 67, about 2890 ly from the Sun in the constellation Cancer. It is a solar twin, having the near exact same temperature and mass as the Sun. YBP 1194 has a slightly higher metallicity than the Sun, and may be slightly younger at an age of 3.5-4.8 billion years. In January 2014, this star was announced to have an exoplanet. It is packed in a small cluster, Messier 67, with a radius of 10 light-years, with over 500 other stars. For comparison, the Sun has 9 star systems within 10 light-years and 94 star systems within 20 light-years.

Planetary system
The exoplanet YBP 1194 b was discovered in January 2014 by researchers at the European Southern Observatory (ESO) as one of three new planets discovered in the M67 cluster, showing that open star clusters are more likely to have planets in them than previously thought. The exoplanet is about 100 times more massive than Earth, comparable in mass to Saturn. YBP 1194 b orbits its star with a 7-day period at a distance of 0.07 AU, closer than the planet Mercury is to the Sun. The combination of its large mass and close orbit makes this planet a hot Jupiter. The orbital eccentricity of YPB 1194 b is about 0.3, greater than Pluto's eccentricity of 0.25.