Top Qs
Timeline
Chat
Perspective
Kepler-553
Star in the constellation Lyra From Wikipedia, the free encyclopedia
Remove ads
Kepler-553 is a star in the northern constellation of Cygnus, approximately 2,430 light-years from the Solar System. It is a G-type subgiant that hosts two known exoplanets.[2][6]
Remove ads
Planetary system
Summarize
Perspective
Two exoplanets are known to orbit Kepler-553, both gas giants. The inner planet, Kepler-553b, is between Neptune and Saturn in size; the outer, Kepler-553c, is a super-Jupiter in the habitable zone.[5] The planets were discovered by NASA's Kepler space telescope using the transit method, and were confirmed in 2016 by a study that used statistical validation to confirm over 1,000 Kepler candidates.[7] They were later characterized with radial velocity measurements.[5]
Kepler-553 b
Kepler-553 b is a super-Neptune-sized planet (or a sub-Saturn) orbiting close to its host star. Its mass remains unconstrained beyond an upper limit due to the challenges in detecting its weak radial velocity signal.[5]
Kepler-553 c
Kepler-553 c is a massive gas giant with a moderate orbital eccentricity, orbiting within the system's habitable zone.[5] Its equilibrium temperature of approximately 251 K[5] makes it a cold giant, potentially analogous to Jupiter but with higher metallicity.[citation needed] The planet's bulk composition is estimated to be about 8% heavy elements by mass, consistent with expectations for a gas giant of its mass.[5]
Prior to its confirmation, this planet was known as KOI-433.02,[6] and a 2011 article from the Planetary Habitability Laboratory included it in a list of exoplanet candidates that could hypothetically host potentially habitable exomoons.[8] There is as yet no evidence of any moons around this planet.
Remove ads
References
Wikiwand - on
Seamless Wikipedia browsing. On steroids.
Remove ads