- weight
- ≈ 1.04 g
- sun
- 5.4× wider
- sky
- amber-orange
Illustration computed from this world’s measured and derived values, not a photograph.
HD 15906 c
HD 15906 c is a confirmed sub-Neptune exoplanet 149 ly from Earth in the constellation Cetus, discovered in 2023 by Transiting Exoplanet Survey Satellite (TESS).
Transit: spotted by the tiny, repeating dip in its star’s light each time the planet crosses in front of it.
Standing on HD 15906 c, you would weigh roughly about 4% more than you do on Earth. Its orange dwarf looks 5.4× 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 22 days, and at an estimated 259°C (498°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 high and thin, almost cartoonish.
Assuming Earth-like air at this world's temperature of about 259°C (498°F), sound would travel roughly 36% 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 259°C (498°F), far too hot for liquid water on the surface.
- Surface gravity is close to Earth's, about 1.04 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 15906 c’s measured and computed values, not a real advisory.
How long to get there · 149 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 15906 c?
HD 15906 c's surface gravity is about 1.0 times Earth's, estimated from its size.
How much would you weigh on HD 15906 c?
Someone who weighs 150 pounds on Earth would weigh about 156 pounds on HD 15906 c.
How far is HD 15906 c from Earth?
HD 15906 c lies about 149 light-years from Earth.
How long would it take to get to HD 15906 c?
At the speed of NASA's Parker Solar Probe, the fastest craft ever built, the journey would take about 231,763 years.
How hot is HD 15906 c?
HD 15906 c's equilibrium temperature, the balance it reaches from its star's light alone before any greenhouse warming, is about 259°C (498°F).
How long is a year on HD 15906 c?
HD 15906 c completes one orbit of its star in 22 days.
Illustration generated from HD 15906 c's confirmed parameters, not a photograph.