- sun
- 7.1× wider
- sky
- warm white
Illustration computed from this world’s measured and derived values, not a photograph.
Kepler-287 b
Kepler-287 b is a confirmed sub-Neptune exoplanet 2,726 ly from Earth in the constellation Cygnus, discovered in 2014 by Kepler.
Transit: spotted by the tiny, repeating dip in its star’s light each time the planet crosses in front of it (what that means).
Its yellow, Sun-like star looks 7.1× wider than ours, bathing the surface in warm white light. It is likely tidally locked, so that sun never moves in the sky: one hemisphere in endless day, the other in permanent night. A year passes in just 20 days, and at an estimated 394°C (741°F) it is blistering.
Catalog values (NASA Exoplanet Archive): mass 83.00 M⊕, radius 2.33 R⊕. Its catalog mass and radius imply a density of 36.2 g/cm³, denser than compressed iron, so they cannot both be right, and gravityfinder does not use Kepler-287 b in gravity rankings or weight calculations.
How closely this world matches Earth in size and warmth, from 0 to 1 (Earth = 1.0). Computed by gravityfinder. See every world ranked →
What these mean: surface gravity · tidal locking · equilibrium temperature · Earth similarity
Hear how a voice sounds herea computed acoustic demoEXPERIMENTAL · just for fun
Your voice would sound high and thin, almost cartoonish.
Assuming Earth-like air at this world's temperature of about 394°C (741°F), sound would travel roughly 52% faster than on Earth, so your voice would sound high and thin, almost cartoonish. The real atmosphere is unknown, so this is a best guess.
A real voice sample, pitch-shifted (tempo held constant) to suggest the acoustics: a playful approximation, not a precise simulation. Voice: Lingua Libre / Vealhurl, CC BY-SA 4.0.
- !Blistering at about 394°C (741°F), far too hot for liquid water on the surface.
- !Likely tidally locked: one hemisphere in endless day, the other in permanent night.
A playful read of Kepler-287 b’s measured and computed values, not a real advisory.
How long to get there · 2,726 ly awayCALCULATED
Zoom out: star → system → (soon) galaxy arm, host black hole, and a real image of the host galaxy.
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How far is Kepler-287 b from Earth?
Kepler-287 b lies about 2,726 light-years from Earth.
How long would it take to get to Kepler-287 b?
At the speed of NASA's Parker Solar Probe, the fastest craft ever built, the journey would take about 4.3 million years.
How hot is Kepler-287 b?
Kepler-287 b's equilibrium temperature, the balance it reaches from its star's light alone before any greenhouse warming, is about 394°C (741°F).
How long is a year on Kepler-287 b?
Kepler-287 b completes one orbit of its star in 20 days.
Illustration generated from Kepler-287 b's confirmed parameters, not a photograph.