Kepler-228

Planetary system · 5364.0 light-years away

Kepler-228 is 5,364 light-years from the Sun. The NASA Exoplanet Archive lists 3 planets around this 6,043 K star; the first was found in 2014 by transit (Kepler).

Fly there in 3D

Worth knowing

Kepler-228 b goes round its star every 2.57 days, 34 times as often as Mercury goes round the Sun.

The star

Surface temperature6,043 K
Mass1.006 solar masses
Radius1.014 solar radii
Luminosity1.292 times the Sun
Apparent magnitude15.902
Ageabout 6.76 billion years
Distance from the Sun5364.0 light-years (1644.6 parsecs)
Position (J2000)RA 296.2861°, Dec 48.2246°
ConstellationCygnus

Planets (3)

PlanetYearOrbitRadiusMassFound
Kepler-228 b2.57 days0.0380 AU1.53 R⊕2.96 M⊕ estimatedTransit, 2014
Kepler-228 c4.13 days0.0520 AU2.7 R⊕7.75 M⊕ estimatedTransit, 2014
Kepler-228 d11.1 days0.101 AU4.04 R⊕15.4 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 6,043 K, 1.3 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.06 to 1.86 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 5,364 years ago, around 3300 BC.

Nearest systems to it

Also found by Kepler

Sources

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