- weight
- ≥ 1.35 g
- sky
- warm white
Illustration computed from this world’s measured and derived values, not a photograph.
HD 158259 b
HD 158259 b is a confirmed rocky exoplanet 88.2 ly from Earth in the constellation Draco, discovered in 2020 by Haute-Provence Observatory.
Radial Velocity: spotted by the gravitational wobble the planet tugs in its star.
Standing on HD 158259 b, you would weigh roughly about 35% more than you do on Earth. Bathing the surface in warm white light. A year passes in just 2.2 days, and at an estimated 1189°C (2172°F) it is hot enough to melt rock.
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
A little heavier than home, at about 1.4 times Earth's gravity. A child raised here would likely grow a little shorter and sturdier than their Earth-raised parents, about 0.94x as tall as on Earth: a 5 ft 10 in adult could stand nearer 5 ft 6 in, with denser bones.
- Bones
- Thick and dense
- More weight to bear forces the skeleton to grow denser and stronger all through childhood.
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 1189°C (2172°F), sound would travel roughly 125% 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.
- !At about 1189°C (2172°F), the daytime side glows: metals run liquid and any atmosphere is being torn away.
- Surface gravity is close to Earth's, at least 1.35 times, so you would move much as you do here.
- !Its star delivers about 759 times the sunlight Earth gets, a blinding, sterilizing glare.
- !Earth-similarity index 0.17: this world has almost nothing in common with our own.
A playful read of HD 158259 b’s measured and computed values, not a real advisory.
How long to get there · 88.2 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 158259 b?
HD 158259 b's surface gravity is at least 1.4 times Earth's, and possibly more: its mass is only a lower bound.
How much would you weigh on HD 158259 b?
Someone who weighs 150 pounds on Earth would weigh at least 203 pounds on HD 158259 b.
How far is HD 158259 b from Earth?
HD 158259 b lies about 88.2 light-years from Earth.
How long would it take to get to HD 158259 b?
At the speed of NASA's Parker Solar Probe, the fastest craft ever built, the journey would take about 137,596 years.
How hot is HD 158259 b?
HD 158259 b's equilibrium temperature, the balance it reaches from its star's light alone before any greenhouse warming, is about 1189°C (2172°F).
How long is a year on HD 158259 b?
HD 158259 b completes one orbit of its star in 2.2 days.
Illustration generated from HD 158259 b's confirmed parameters, not a photograph.