| Proper Name | None | | Designations | Kepler-23 d, KOI-168 d, KOI-168.02, KIC 11512246 d, KIC 11512246.02 | | Classification | Earth-mass planet or super Earth | | Orbital Period | 15 days, 7 hours | | Mean Distance from Kepler-23 | 19.1 million km
0.13 AU | | Mass | Not known | | Diameter | 2.2 x Earth | | Temperature | Not known | | Parent star | Kepler-23, yellow dwarf in Cygnus | | Other planets in this system | Kepler-23 b, Earth-mass planet
Kepler-23 c, Earth-mass planet | | Notes | Kepler-23 is a relatively Sun-like yellow star in Cygnus, nearly 3,000 light years from the Solar System. Its known planetary system consists of three planets in close orbits around the star, of which even Kepler-23 d, the outermost, follows an orbital path well within that of Mercury around the Sun. |
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