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Kepler 90

Kepler-90 (= KIC 11442793 = KOI-351) is the first extrasolar system known to be made of eight planets around a star, as the Solar System.

The central star is a yellow dwarf star (G0V spectral type) with a radius and a mass respectively about 12% and 29% larger than those of the Sun.

All eight planets were discovered thanks to the observation of their transits by the Kepler space telescope, in 2013 for planets Kepler-90 b to h and in 2017 for Kepler-90 i. The three innermost planets (Kepler-90 b, c and i) are very hot (super-)Earths, the three intermediate planets (Kepler-90 d, e and f) are hot mid-sized planets (~2.8 Earth radii, in between the Earth and Neptune), and the two outermost planets (Kepler-90 g and h) are temperate gas giants.

 

Name Mass(MJ) Radius(RJ) Period(days) Discovery(date)
Kepler-90 b 0.117 7.01 2013
 Kepler-90 c 0.106 8.72 2013
Kepler-90 d 0.257 59.7 2013
Kepler-90 e 0.238 91.94 2013
Kepler-90 f 0.258 124.9 2013
Kepler-90 g 0.725 210.6 2013
Kepler-90 h 1.01 331.6 2013
Kepler-90 i 0.118 14.45 2017

 

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Categories: Planet of the month

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