Kepler-197

Planetary system · 1078.2 light-years away

Kepler-197 is 1,078 light-years from the Sun. The NASA Exoplanet Archive lists 4 planets around this 6,004 K star; the first was found in 2014 by transit (Kepler).

Fly there in 3D

Worth knowing

Kepler-197 b goes round its star every 5.60 days, 16 times as often as Mercury goes round the Sun.

Kepler-197 is one of 2 stars in its system. The position of the other star is not catalogued, so only Kepler-197 and its planets are drawn.

The star

Surface temperature6,004 K
Mass0.857 solar masses
Radius1.12 solar radii
Luminosity1.667 times the Sun
Apparent magnitude11.775
Ageabout 5.37 billion years
Distance from the Sun1078.2 light-years (330.6 parsecs)
Position (J2000)RA 295.2265°, Dec 50.5592°
ConstellationCygnus

Planets (4)

PlanetYearOrbitRadiusMassFound
Kepler-197 b5.60 days0.0600 AU1.02 R⊕1.04 M⊕ estimatedTransit, 2014
Kepler-197 c10.3 days0.0900 AU1.23 R⊕5.3 M⊕Transit, 2014
Kepler-197 d15.7 days0.119 AU1.22 R⊕1.98 M⊕ estimatedTransit, 2014
Kepler-197 e25.2 days0.164 AU0.91 R⊕0.693 M⊕ estimatedTransit, 2014

Values are the NASA Exoplanet Archive’s composite parameters. A radius marked estimated comes from a mass–radius relation; a mass marked minimum is M sin i. Planet sizes and colours in the 3D view are renderings: none of these worlds has been photographed as more than a point of light.

The planets, compared

For a star of 6,004 K, 1.7 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.21 to 2.12 AU. None of its known planets orbits inside it. The zone says how much starlight arrives, not whether a planet has water or air. The edges follow Kopparapu et al. (2014), as the 3D view draws them.

The light you see left 1,078 years ago, around AD 950.

Nearest systems to it

Also found by Kepler

Sources

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