K2-111 - System
K2-111, a Sun-like G-type star of 0.84 solar masses, and K2-111 b, a 5.3-Earth-mass planet, with an orbital period of 5.4 days, at 0.057 AU from its star, and an equilibrium temperature near 1,293 K.
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Exoplanets
2-Planet System, page 11
Track gravitational perturbations, transit timing variations, and orbital stability between binary planet arrangements around distant stars.
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K2-117 - System
K2-117, an orange K-type dwarf of 0.54 solar masses, and K2-117 b, a planet with 2.0 Earth radii, with an orbital period of 1.3 days, at 0.019 AU from its star, and an equilibrium temperature near 868 K.
K2-141 - System
K2-141 b, a lava world on an ultra-short orbit. The dayside is hot enough for a rock-vapor atmosphere that may rain out as magma. A year on the lava world lasts only about 6.7 hours.
K2-146 - System
K2-146, a cool M-dwarf of 0.33 solar masses, and K2-146 b, a 5.8-Earth-mass planet, with an orbital period of 2.6 days, on an eccentric orbit (e ≈ 0.13).
K2-154 - System
K2-154, an orange K-type dwarf of 0.65 solar masses, and K2-154 b, a planet with 2.0 Earth radii, with an orbital period of 3.7 days, at 0.041 AU from its star, and an equilibrium temperature near 715 K.
K2-158 - System
K2-158, a Sun-like G-type star of 0.92 solar masses, and K2-158 c, a planet with 1.3 Earth radii, with an orbital period of 5.9 days, at 0.062 AU from its star, and an equilibrium temperature near 948 K.
K2-16 - System
K2-16, an orange K-type dwarf of 0.68 solar masses, and K2-16 b, a planet with 2.0 Earth radii, with an orbital period of 7.6 days, at 0.067 AU from its star, and an equilibrium temperature near 658 K.
K2-18 - System
K2-18 b, a temperate sub-Neptune in the habitable zone of a red dwarf. It is one of JWST's most studied small-planet atmospheres. Hubble reported water vapor in its thick atmosphere.
K2-183 - System
K2-183, a Sun-like G-type star of 0.94 solar masses, and K2-183 c, a planet with 2.3 Earth radii, with an orbital period of 10.8 days.
K2-188 - System
K2-188, a Sun-like G-type star of 1.06 solar masses, and K2-188 b, a planet with 1.4 Earth radii, with an orbital period of 1.7 days, at 0.029 AU from its star, and an equilibrium temperature near 1,692 K.
K2-189 - System
K2-189, a Sun-like G-type star of 0.85 solar masses, and K2-189 b, a planet with 1.4 Earth radii, with an orbital period of 2.6 days, and an equilibrium temperature near 1,203 K.
K2-199 - System
K2-199, an orange K-type dwarf of 0.71 solar masses, and K2-199 b, a 6.9-Earth-mass planet, with an orbital period of 3.2 days, at 0.038 AU from its star, and an equilibrium temperature near 913 K.
K2-21 - System
K2-21, an orange K-type dwarf of 0.68 solar masses, and K2-21 b, a planet with 1.8 Earth radii, with an orbital period of 9.3 days, at 0.076 AU from its star, on an eccentric orbit (e ≈ 0.10).
K2-223 - System
K2-223, a Sun-like G-type star of 1.06 solar masses, and K2-223 b, a planet with 0.9 Earth radii, with an orbital period of 12.1 hours.
K2-224 - System
K2-224, a Sun-like G-type star of 0.91 solar masses, and K2-224 b, a planet with 1.6 Earth radii, with an orbital period of 4.5 days, at 0.052 AU from its star, and an equilibrium temperature near 1,002 K.
K2-229 - System
K2-229, a Sun-like G-type star of 0.87 solar masses, and K2-229 c, a planet with 2.0 Earth radii, with an orbital period of 8.3 days, at 0.077 AU from its star, and an equilibrium temperature near 750 K.
K2-24 - System
K2-24, a Sun-like G-type star of 1.09 solar masses, and K2-24 b, a 0.06-Jupiter-mass companion, with an orbital period of 20.9 days, at 0.167 AU from its star, and an equilibrium temperature near 732 K.
K2-240 - System
K2-240, a cool M-dwarf of 0.58 solar masses, and K2-240 b, a planet with 2.0 Earth radii, with an orbital period of 6.0 days, at 0.051 AU from its star, and an equilibrium temperature near 586 K.