COROT-7

CoRoT-7 (TYC 4799-1733-1) is a binary star system made up of a late G-type star and a M-dwarf star that was discovered in 2021. The primary star has three exoplanets, including CoRoT-7b, a super-Earth exoplanet that is remarkable due to its extremely high temperature (around 2000°C) and very short orbital period, around 20 hours. It was the first exoplanet shown to be rocky. The system has the name CoRoT-7 after the CoRoT space telescope, which discovered the exoplanets around the star CoRoT-7A. The stellar system is 520 light-years from the Earth. == Stellar components == === CoRoT-7A === The primary, CoRoT-7A is a G-type main sequence star, slightly smaller, cooler, and younger than the Sun. It has an apparent magnitude of 11.67, fainter than Proxima Centauri (mag. 11.05), the nearest star to the Sun, and is far too faint to be seen with the naked eye. This star is approximately 520 light-years away from the Solar System in the constellation Monoceros (the Unicorn).

=== CoRoT-7B === The comoving companion CoRoT-7B was discovered in 2021. It is a red dwarf star. ==Location and properties== The star is located in the LRa01 field of view of the CoRoT spacecraft. It is about 500 light years from Earth. According to the project website, this field is in the Monoceros constellation. Published data lists the stellar properties as being a G9V yellow dwarf with a temperature of 5250 K, a radius of about 82% of the Sun and a mass of about 91% of the Sun, But other sources have listed it as a (K0V) orange dwarf. The metallicity is 0.12 ± 0.06. The star is estimated to be about 150 parsecs away, with an age in the range 1.2 – 2.3 billion years, younger than our own star which has an age of 4.6 billion years. The rotation period of the star, inferred by the light curve obtained by CoRoT, is around 23 days.