Kepler-47

Planetary system · 3343.2 light-years away

Kepler-47 is 3,343 light-years from the Sun. The NASA Exoplanet Archive lists 3 planets around this 5,636 K star; the first was found in 2012 by transit (Kepler).

Fly there in 3D

Worth knowing

Kepler-47 b goes round its star every 49.5 days, 1.8 times as often as Mercury goes round the Sun.

Kepler-47 is one of 2 stars in its system. The position of the other star is not catalogued, so only Kepler-47 and its planets are drawn.

The star

Surface temperature5,636 K
Mass0.957 solar masses
Radius0.936 solar radii
Luminosity0.8395 times the Sun
Apparent magnitude15.31
Distance from the Sun3343.2 light-years (1025.0 parsecs)
Position (J2000)RA 295.2979°, Dec 46.9204°
ConstellationCygnus

Planets (3)

PlanetYearOrbitRadiusMassFound
Kepler-47 b49.5 days0.288 AU3.05 R⊕2.07 M⊕Transit, 2012
Kepler-47 d187.4 days0.699 AU7.04 R⊕19.02 M⊕Transit, 2019
Kepler-47 c303.2 days0.964 AU4.65 R⊕3.17 M⊕Transit, 2012

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 5,636 K, 0.84 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.88 to 1.56 AU. 1 of its 3 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 3,343 years ago, around 1300 BC.

Nearest systems to it

Also found by Kepler

Sources

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