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Entering orbit…
Habitability
45/ 100
Marginal
TOI-1452 b rendered in TerraForge from its measured mass, orbit and star

TOI-1452 b

Also written TOI-1452b, TOI 1452b, TOI 1452 b

Water-Rich99 light years awayFound 2022
Mass
4.82 × Earth
Radius
1.67 × Earth
Gravity
1.73 g
Surface (est.)
340 K
Year
11.1 days
From Earth
99.5 ly
Mass
4.82 × Earth
Radius
1.67 × Earth
Gravity
1.73 g
Surface (est.)
340 K
Year
11.1 days
From Earth
99.5 ly

TOI-1452 system

Type
M-type (Red Dwarf)
Spectral type
M4 +/- 0.5 V
Temperature
3,185 K
Radius
0.275 ☉
Mass
0.249 ☉
Planets
1
Luminosity
7.00e-3 ☉

Published by the NASA Exoplanet Archive. This world’s temperature and habitability score are computed from this star’s measured luminosity, not from a stand-in for its class.

TOI-1452 b0.061 AUYou are here4.8 M⊕
Habitable zone

Star and planets drawn to scale: the star is 18 times as wide as TOI-1452 b, so only its edge is in view. Orbits spaced as in the star system view.

Water-Rich, likely · its density could also fit a sub-Neptune

TOI-1452 b is a candidate water world: a planet about 1.7 times Earth's width whose density suggests water may make up a large share of it. It orbits the brighter of two red dwarfs in a close pair about 100 light-years away, every 11.1 days, at a distance where its equilibrium temperature, set by starlight alone, is about 326 kelvin.

Surface. Vast oceans covering most of the surface, scattered islands or archipelagos

✓ Conditions could support life. This planet’s modelled conditions could support biological processes: stable temperatures, liquid water and the chemistry life as we know it needs. That makes life possible, not present.

Water-Rich
Life possibleHigh Activity
TOI-1452 b has abundant oxygen (31.1%) and hydrogen (15.3%), creating extensive water coverage while in the habitable temperature zone.
Water worlds have deep global oceans covering most or all of their surface. They form when planets have high water content and orbit in the habitable zone.
Classification Criteria:
✓ Oxygen: 31.1% + Hydrogen: 15.3% (water-forming elements)✓ Temperature: 340K (habitable range)✓ Distance: 0.06 AU (habitable zone)

Reading TOI-1452 b’s atmosphere

Dominant elements: O, Si, H, Fe, N, CThis is what a telescope would measure while TOI-1452 b crosses in front of its star: starlight passes through the atmosphere and spreads into a rainbow band. Each dark line marks a wavelength the atmosphere absorbed.Every element absorbs its own signature wavelengths — hydrogen always darkens the same two spots, calcium another pair, and so on. Astronomers match the lines in a real spectrum against a library of these signatures to say what an atmosphere is made of, light-years away, without ever visiting. A deeper line generally means more of that element is present.TOI-1452 b sits about 99 light-years away, found by the transit method. Most catalogued distances trace back to parallax: as Earth orbits the Sun, a nearby star appears to shift very slightly against the distant background stars, and the size of that shift gives its distance directly.
Further reading
ExoplanetsSara Seager (editor)The field's standard reference: how planets are found, how they form, and what their atmospheres are made of.The Planet FactoryElizabeth TaskerHow planets are made, and why so few of them come out like Earth.Imagined LifeJames Trefil & Michael SummersWhat could live on a world like this one: ice shells, supergravity, tidally locked twilight.Envisioning ExoplanetsMichael CarrollWhat these worlds might look like from the ground, painted from the same measurements this page renders.
As an Amazon Associate I earn from qualifying purchases — if you buy through these links, TerraForge may receive a small commission at no extra cost to you.
Habitability ScoreMarginal
45
Contributing Factors
temperature40
Hot - near boiling, only heat-loving microbes would thrive
atmosphere60

Nitrogen and oxygen with water vapor, mild greenhouse effect

Nitrogen-oxygen atmosphere - breathable and protective (partially stripped by slow rotation)
water100
Abundant water
magnetic Field30
No magnetic field - vulnerable to solar radiation
geology90
Active geology recycles nutrients and drives carbon cycle
Organic Chemistry80
Core organic elements (CHNO) present
rotation30
Very slow rotation - days and nights each last several Earth days, bringing extreme temperature swings

Physical Properties

Mass
4.82x Earth (2.88e+25 kg)
Radius
1.69x Earth (10,762 km)
This planet: 1.69× Earth radiusEarth: 1× (baseline)
Surface Gravity
1.69x Earth (16.6 m/s²)
Surface Temperature
340 K (67 °C / 153 °F)
Rotation Period
266.4 hours/day (slower than Earth)
This planet: 266 h/dayEarth: 24 h/day

Elemental Composition

How TerraForge built this world

TOI-1452 b, from the NASA Exoplanet Archive (found 2022). Measured: 4.82 Earth masses, 0.061 AU, a 3185 K M-type star. Composition inferred from a measured bulk density of 1.03x Earth's at this size, suggesting roughly 15% water/ice by mass, with a day locked to its 11.1-day year, as anything orbiting this close would be.

A dark ringed planet hanging over the horizon of a rocky moon, its rings lit by a distant sun

New: Stand on Your Moons 🌒

A planet's surface view isn't the only ground any more. Press the surface button on a planet with moons and it asks where to stand: the planet itself, or any moon still in orbit, each tagged with what it became — ocean, ice, carbon, volcanic. Every moon gets its own ground and sky from its own physics: airless rock under a black sky, ice cracked by geysers over a hidden sea, sulfur plains shaking with eruptions, or orange haze you can't see the sun through. And hanging over the horizon, there's the planet you built.

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