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| '''Kepler-37''' is a yellow dwarf, ], 215.2 ] away in the ] ]. It is host to the ] Kepler-37b, Kepler-37c and Kepler-37d. They all orbit very close to the star. Kepler-37 has a mass of about 80.3 percent the ]and a radius of about 77 percent. It |
'''Kepler-37''' is a yellow dwarf, ], 215.2 ] away in the ] ]. It is host to the ] Kepler-37b, Kepler-37c and Kepler-37d. They all orbit very close to the star. Kepler-37 has a mass of about 80.3 percent of the ] and a radius of about 77 percent. It has a temperature similar to that of our Sun but it is a little bit cooler at 5,417 Kelvin. It has only about half the metallicity of our Sun. With an age of roughly 6 billion years it is slightly older than our sun and it is still a main-sequence star. | ||
| == Planetary system == | == Planetary system == | ||
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Diagram showing star positions and boundaries of the constellation and its surroundings Location of Kepler-37 in (circled) |
Kepler-37 is a yellow dwarf, G-type star, 215.2 light years away in the constellation Lyra. It is host to the exoplanets Kepler-37b, Kepler-37c and Kepler-37d. They all orbit very close to the star. Kepler-37 has a mass of about 80.3 percent of the Sun's and a radius of about 77 percent. It has a temperature similar to that of our Sun but it is a little bit cooler at 5,417 Kelvin. It has only about half the metallicity of our Sun. With an age of roughly 6 billion years it is slightly older than our sun and it is still a main-sequence star.
Planetary system
Kepler-37b is closest to the star. It is the smallest known exoplanet as of February 2013. At 3865 kilometers in diameter it is slightly larger than Earth's moon. It orbits Kepler-37 once every 13 Earth days at a distance close to 0.1 AU and is too small and too close to its star to maintain an atmosphere.
Kepler-37c has around three-quarters the radius of Earth and it orbits about every 21 days at a distance of nearly 0.14 AU.
Kepler-37d has about twice the radius of Earth. It has an orbital period of around 40 Earth days at a distance of nearly 0.21 AU.
References
- Nature,
- Bad Astronomy,
- NASA,
- JPL
See also
- NASA, Kepler mission, Table of Confirmed Planets
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