Q16001046

Kepler-138, also known as KOI-314, is a red dwarf located in the constellation Lyra, 219 light years from Earth. It is located within the field of vision of the Kepler spacecraft, the satellite that NASA's Kepler Mission used to detect planets transiting their stars.

Wikidata facts

Instance of: eruptive variable star
Constellation: Lyra
Distance from Earth: 67.1055
Diameter: 770000
Radius: 0.44
Mass: 0.52
Variable-star type: rotating variable star
Image: Artist's Impression of Kepler 138 Planetary System (2022-048).png

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catalog code: KIC 7603200
effective temperature: 3841
parallax: 0.0191
radial velocity: -36.563
apparent magnitude: 12.68
metallicity: -0.241
spectral class: M0
epoch: J2000.0
surface gravity: 30000
right ascension component of proper motion: -0.023
declination component of proper motion: 0.022
right ascension: 290.38153323158997
declination: 43.29296693628
Commons category: Kepler-138
stellar rotational velocity: 4.172

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Encyclopedic overview

6 sections

Contents

Nomenclature and history
Stellar characteristics
Planetary system
See also
References
External links

The star hosts three confirmed planets and a likely fourth, including the lowest-mass exoplanet with a measured mass and size discovered to date, Kepler-138b, with a mass comparable to that of Mars. Kepler-138d is remarkable for its low density; initially thought likely to be a gas dwarf, more recent observations as of 2022 show that it, as well as planet c, are likely to be ocean worlds.

Excerpted from Wikipedia’s “Q16001046” article, available under the CC BY-SA 4.0 licence.

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