Kepler-377

Planetary system · 2686.9 light-years away

Kepler-377 is 2,687 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this 5,949 K star; the first was found in 2014 by transit (Kepler).

Fly there in 3D

Worth knowing

Kepler-377 b goes round its star every 12.5 days, 7 times as often as Mercury goes round the Sun.

The star

Surface temperature5,949 K
Mass1.043 solar masses
Radius1.224 solar radii
Luminosity1.65 times the Sun
Apparent magnitude14.081
Ageabout 5.5 billion years
Distance from the Sun2686.9 light-years (823.8 parsecs)
Position (J2000)RA 295.4221°, Dec 38.7357°
ConstellationCygnus

Planets (2)

PlanetYearOrbitRadiusMassFound
Kepler-377 b12.5 days0.109 AU1.39 R⊕2.51 M⊕ estimatedTransit, 2014
Kepler-377 c27.0 days0.182 AU2.06 R⊕4.9 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 5,949 K, 1.6 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 2,687 years ago, around 700 BC.

Nearest systems to it

Also found by Kepler

Sources

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