Star system, 1,200 light-years
Kepler-442 and its one planet
Kepler-442 b is an exoplanet 1.34 times Earth's width, 1,200 light-years away, orbiting in its star's computed habitable zone.
Kepler-442 is a star of spectral type the table does not record, 1,200 light-years from us, with one known planet.
Drawn at the system's own scale, every orbit from the Archive's numbers.
What is measured, what is computed, what is imagined.
measured The period, and where the table says so the width and the mass, by the method named in each section.
computed Anything marked computed: the size of an orbit where Kepler's third law corrects the table, the temperature of a bare ball at that distance, the starlight received, and the habitable zone.
imagined The picture is an artist's impression. Nobody has seen the surface of a planet of another star: its colour, clouds and land are not known, and the share picture says so in its corner.
Kepler-442 b
Kepler-442 b is an exoplanet 1.34 times Earth's width, 1,200 light-years away, orbiting in its star's computed habitable zone.
- Width
- 1.34 × Earth's measured
- Mass
- about 2.36 times Earth's estimated by the Archive from the planet's size, not measured
- One year
- 112.305 days measured
- Distance from its star
- 0.3861 au computed from the period and the star's mass
- Temperature of a bare ball there
- 240 K computed, not measured
- Starlight, against Earth's
- 0.784 × computed
It was found as a small, regular dip in its star's light each time it crosses in front of it in 2015. Its orbit lies inside the conservative habitable zone computed for its star (liquid water on a rocky world's surface would be possible there, which says nothing about whether any is). The Archive's own distance for it is 0.409 au; the three papers behind its period, its star's mass and that distance do not agree with Kepler's third law, so the page uses the one the period and the star's mass give.
See Kepler-442 b in 3D · The picture is an artist's impression.
The star
- Surface temperature
- 4,402 K
- Width
- 0.598 × the Sun's
- Mass
- 0.609 × the Sun's
- Distance
- 1,200 light-years
- Habitable zone, computed
- 0.3475 to 0.6455 au from the star