- weight
- ≥ 1.02 g
- sun
- 3.1× wider
- sky
- amber-orange
Illustration computed from this world’s measured and derived values, not a photograph.
HD 13808 c
HD 13808 c is a confirmed sub-Neptune exoplanet 92.1 ly from Earth in the constellation Eridanus, discovered in 2021 by La Silla Observatory.
Radial Velocity: spotted by the gravitational wobble the planet tugs in its star.
Standing on HD 13808 c, you would weigh roughly almost exactly what you weigh on Earth. Its orange dwarf looks 3.1× wider than ours, bathing the surface in amber-orange 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 54 days, and at an estimated 151°C (305°F) it is blistering.
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
If your children grew up herea playful thought experiment
Gravity close to Earth's, at about 1.0 times. A child would grow up much as they would back home.
A playful thought experiment from this world’s gravity, not a prediction about any real person. No human has ever grown up off Earth, so no one truly knows; the direction (taller in low gravity, shorter and stockier in high) follows how growing bodies respond to weight.
Hear how a voice sounds herea computed acoustic demo
Your voice would sound noticeably higher and reedier.
Assuming Earth-like air at this world's temperature of about 151°C (305°F), sound would travel roughly 21% faster than on Earth, so your voice would sound noticeably higher and reedier. 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.
- !Persistently hot at around 151°C (305°F), well above anything you would call comfortable.
- Surface gravity is close to Earth's, at least 1.02 times, so you would move much as you do here.
- !Likely tidally locked: one hemisphere in endless day, the other in permanent night.
A playful read of HD 13808 c’s measured and computed values, not a real advisory.
How long to get there · 92.1 ly away
Zoom out: star → system → (soon) galaxy arm, host black hole, and a real image of the host galaxy.
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What is the gravity on HD 13808 c?
HD 13808 c's surface gravity is at least 1.0 times Earth's, and possibly more: its mass is only a lower bound.
How much would you weigh on HD 13808 c?
Someone who weighs 150 pounds on Earth would weigh at least 152 pounds on HD 13808 c.
How far is HD 13808 c from Earth?
HD 13808 c lies about 92.1 light-years from Earth.
How long would it take to get to HD 13808 c?
At the speed of NASA's Parker Solar Probe, the fastest craft ever built, the journey would take about 143,602 years.
How hot is HD 13808 c?
HD 13808 c's equilibrium temperature, the balance it reaches from its star's light alone before any greenhouse warming, is about 151°C (305°F).
How long is a year on HD 13808 c?
HD 13808 c completes one orbit of its star in 54 days.
Illustration generated from HD 13808 c's confirmed parameters, not a photograph.