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Entering orbit…
Habitability
6/ 100
Uninhabitable

Reading TOI-4468 c’s atmosphere

Dominant elements: H, O, Si, Fe, N, CThis is what a telescope would measure while TOI-4468 c 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-4468 c sits about 1226 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.

TOI-4468 c

Also written TOI-4468c, TOI 4468c, TOI 4468 c

Ice GiantUninhabitable1226 light years awayFound 2026

TOI-4468 c, from the NASA Exoplanet Archive (found 2026). Measured: 9.75 Earth masses, 0.0667 AU, a 5170 K K-type star. Composition inferred from a measured bulk density of 0.33x Earth's, larger than even a pure water/ice world of this mass, suggesting a water-rich interior under roughly a 4% hydrogen/helium envelope by mass, with a day locked to its 7.0-day year, as anything orbiting this close would be.

Host star

TOI-4468

Type
K-type (Orange)
Temperature
5,170 K
Radius
0.771 ☉
Mass
0.805 ☉
Known planets
2, including this one
Luminosity
0.381 ☉

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.

Ice Giant

Extreme Activity
Why is this a Ice Giant?TOI-4468 c has moderate mass (9.8x Earth) with significant water, carbon, and nitrogen content, characteristic of ice giants.
Ice giants like Uranus and Neptune have icy interiors with thick atmospheres of hydrogen and helium, but not enough to be classified as gas giants.
Classification Criteria:
✓ Mass: 9.8x Earth (5-20x range)✓ Water/Carbon/Nitrogen rich composition
Further reading
Exoplanets: Diamond Worlds, Super Earths, Pulsar PlanetsMichael Summers & James TrefilThe strange end of the catalogue — carbon worlds, molten rock, planets orbiting dead stars.The Little Book of ExoplanetsJoshua WinnHow these worlds are found, and what a measurement can honestly tell us.Envisioning ExoplanetsMichael CarrollWhat these worlds might look like from the ground, painted from the same measurements this page renders.Imagined LifeJames Trefil & Michael SummersWhat could live on a world like this one: ice shells, supergravity, tidally locked twilight.
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 ScoreUninhabitable
6
Contributing Factors
temperature5
Scorching - hot enough to melt lead, though rock stays solid; no chance for life
atmosphere30
Hydrogen-rich atmosphere typical of gas giants
water15
No solid surface — any water is locked in a supercritical mantle and hot ice, not oceans
magnetic Field30
No magnetic field - vulnerable to solar radiation
geology40
Extreme volcanic activity may be hazardous
Organic Chemistry80
Core organic elements (CHNO) present
rotation30
Very slow rotation - extreme temperature swings between eternal day and night sides

Physical Properties

Mass
9.75x Earth (5.82e+25 kg)
Radius
2.14x Earth (13,611 km)
This planet: 2.14× Earth radiusEarth: 1× (baseline)
Surface Gravity
2.14x Earth (21.0 m/s²)
Surface Temperature
887 K (614 °C / 1,136 °F)
Rotation Period
168.2 hours/day (slower than Earth)
This planet: 168 h/dayEarth: 24 h/day

Orbital Environment

Star Type
K-type (Orange)
Distance from Star
0.07 AU (9.98 million km)
Orbital Period
8 days

Atmosphere

Hydrogen and helium with water, methane, and ammonia ices

Elemental Composition

H - Hydrogen
55.0%
O - Oxygen
29.1%
Si - Silicon
5.8%

Surface Characteristics

No solid surface - a deep volatile envelope over a supercritical water mantle and hot-ice interior
A banded gas giant with four moons in different colors: a yellow sulfur moon, two rust-red rock moons and a blue water moon

New: Choose What Your Moons Are Made Of 🌙

Every moon used to be grey rock, white ice or blue ocean, decided for you. Now each one has a "Made of" choice in the builder's Moons tab — silicate rock, iron, water ice, carbon, sulfur, or nitrogen and methane ice — and the physics decides what that becomes. Put water ice too close to the star and it boils off to bare rock. Put sulfur where a neighbouring moon keeps it tidally flexed and it erupts in Io's yellows. Give a Titan-sized moon nitrogen ice far from the sun and it wraps itself in haze. Hang a water moon about the mass of Earth off a giant planet in the habitable zone and it can hold air and open seas — scored for life on the same scale as a planet, with a day as long as its orbit. A tint slider nudges the colour, but only as far as that material could really go.

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