Kepler-80 is an extrasolar system located 1100 light-years away. It is made of an orange dwarf star and at least six (super-)Earth-sized planets. In order of increasing distance from the star, the six planets are Kepler-80 f, d, e, b, c, and g.
The central star is of spectral type K5V and has a surface temperature of 4540 kelvins (4270 °C). Its radius and mass are about 70% of those of the Sun.
All six planets were discovered thanks to the observation of their transits by the Kepler space telescope, in 2012 for planets Kepler-80 b to f and in 2017 for Kepler-80 g. This system is interesting because the five outermost planets make a “resonant chain”: for each pair of adjacent planets, the orbital periods are close to an integer ratio, in this system either 2:3 or 3:4. This is analogous to the resonant chain of the seven TRAPPIST-1 planets.
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