Kepler-177

Planetary system · 4681.8 light-years away

Kepler-177 is 4,682 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this 5,732 K star; the first was found in 2013 by transit (Kepler).

Fly there in 3D

Worth knowing

Kepler-177 b goes round its star every 36.9 days, 2.4 times as often as Mercury goes round the Sun.

The star

Surface temperature5,732 K
Mass0.921 solar masses
Radius1.324 solar radii
Luminosity1.738 times the Sun
Apparent magnitude15.171
Ageabout 11.75 billion years
Distance from the Sun4681.8 light-years (1435.4 parsecs)
Position (J2000)RA 286.0471°, Dec 45.0532°
ConstellationLyra

Planets (2)

PlanetYearOrbitRadiusMassFound
Kepler-177 b36.9 days0.211 AU3.5 R⊕5.84 M⊕Transit, 2013
Kepler-177 c49.4 days0.257 AU8.73 R⊕14.7 M⊕Transit, 2013

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 5,732 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 1.26 to 2.22 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 4,682 years ago, around 2700 BC.

Nearest systems to it

Also found by Kepler

Sources

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