- weight
- ≈ 1.04 g
- sky
- warm white
Illustration computed from this world’s measured and derived values, not a photograph.
HD 109833 b
HD 109833 b is a confirmed sub-Neptune exoplanet 259 ly from Earth in the constellation Musca, discovered in 2022 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 109833 b, you would weigh roughly about 4% more than you do on Earth. Bathing the surface in warm white light. A year passes in just 9.2 days, and at an estimated 513°C (955°F) it is furnace-hot.
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 513°C (955°F), sound would travel roughly 65% 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.
- !Furnace-hot at around 513°C (955°F), with no liquid water and no shade anywhere.
- Surface gravity is close to Earth's, about 1.04 times, so you would move much as you do here.
- !Its star delivers about 63 times the sunlight Earth gets, a blinding, sterilizing glare.
A playful read of HD 109833 b’s measured and computed values, not a real advisory.
How long to get there · 259 ly away
Zoom out: star → system → (soon) galaxy arm, host black hole, and a real image of the host galaxy.
Matched telescope & eyepiece recommendations are coming. Any product links will carry a clear affiliate disclosure.
What is the gravity on HD 109833 b?
HD 109833 b's surface gravity is about 1.0 times Earth's, estimated from its size.
How much would you weigh on HD 109833 b?
Someone who weighs 150 pounds on Earth would weigh about 156 pounds on HD 109833 b.
How far is HD 109833 b from Earth?
HD 109833 b lies about 259 light-years from Earth.
How long would it take to get to HD 109833 b?
At the speed of NASA's Parker Solar Probe, the fastest craft ever built, the journey would take about 404,683 years.
How hot is HD 109833 b?
HD 109833 b's equilibrium temperature, the balance it reaches from its star's light alone before any greenhouse warming, is about 513°C (955°F).
How long is a year on HD 109833 b?
HD 109833 b completes one orbit of its star in 9.2 days.
Illustration generated from HD 109833 b's confirmed parameters, not a photograph.