This was one of the least massive confirmed planet detected by radial velocity survey. Their orbital periods range from seven days to nine months.ДЄlpha Centauri Bb (Ixionidae) was the only planet detected in the Alpha Centauri system that is now refuted. Around Alpha Cen B, all four are rocky, one sub-Earth, one mid-Earth, and one super-Earth.

One of those planets was detected in October 2012, the innermost planet around Alpha Cen B, but now the existence is refuted.ДЄround Alpha Cen A, both planets are rocky/metallic, one is a mid-Earth and one is a super-Earth. This star gives off 600 times less radiation than our sun emits.ДЄlpha Centauri system has four planets, zero around Alpha Cen A, possibly one around Alpha Cen B, and two (possibly three) around Proxima Cen. Alpha Cen C is a dim red dwarf of spectral class M5V-VIe massing one-eighth that of the Sun. It orbits at approximately 15,000 AU or 0.24 light-years from the AB pair, however it is possible that it is not bound to the system if is moving in a hyberbolic path. The ternary star in this system is Alpha Centauri C, well known as Proxima Centauri, which is the nearest individual star to our solar system. Separation between two stars range from 11.2 AU to 35.6 AU (1.67 to 5.30 Tm) throughout the 80-year orbit. The secondary star is Alpha Centauri B, which is an orange K-type star, meaning it is smaller, dimmer and cooler than our Sun. Alpha Cen A is richer in metals and older than our own star. The primary star of this system is Alpha Centauri A, which is the sun-like star, though bigger and brighter than our Sun.

Planet centauri wiki