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Entering orbit…
Habitability
6/ 100
Uninhabitable
TOI-2535 b rendered in TerraForge from its measured mass, orbit and star

TOI-2535 b

Also written TOI-2535b, TOI 2535b, TOI 2535 b

Gas Giant1121 light years awayFound 2026
Mass
150.00 × Earth
Radius
9.46 × Earth
Gravity
1.68 g
Surface (est.)
754 K
Year
8.2 days
From Earth
1,122 ly
Mass
150.00 × Earth
Radius
9.46 × Earth
Gravity
1.68 g
Surface (est.)
754 K
Year
8.2 days
From Earth
1,122 ly

TOI-2535 system

Type
G-type (Yellow (Sun-like))
Spectral type
G8V
Temperature
5,256 K
Radius
0.877 ☉
Mass
0.864 ☉
Planets
1
Luminosity
0.529 ☉

Published by the Extrasolar Planets Encyclopaedia. This world’s temperature and habitability score are computed from its star’s published radius and temperature.

Habitable zone

Star and planets drawn to scale: the star is 10 times as wide as TOI-2535 b, so only its edge is in view. Orbits spaced as in the star system view.

exoplanet.euListed by the Extrasolar Planets Encyclopaedia; not yet in NASA's confirmed catalogue.View on exoplanet.eu

For about seven years, NASA's Transiting Exoplanet Survey Satellite (TESS) watched a giant planet called TOI-2535 b cross in front of its star, and then watched those crossings stop. A transit is the small dip in starlight seen when a planet passes across the face of its star from our point of view. Between 2019 and early 2026 the planet's transits grew shorter and shallower, and by 2026 they no longer appeared at all. The team that reported it, led by Samuel Yee at UCLA, describes it as the first confirmed planet orbiting a single star whose transits have been directly observed to disappear.

Surface. No solid surface - thick gaseous envelope with possible rocky core deep within

Gas Giant
Magnetic FieldExtreme Activity
TOI-2535 b has 86.0% hydrogen and helium, combined with a mass of 150.0x Earth, which exceeds the gas giant threshold.
Gas giants form when massive cores capture enormous atmospheres of light gases. They typically form beyond the 'frost line' where volatiles can condense.
Classification Criteria:
✓ Hydrogen + Helium: 86.0% (>60% required)✓ Mass: 150.0x Earth (>10x required)

Reading TOI-2535 b’s atmosphere

Dominant elements: H, He, O, C, NThis is what a telescope would measure while TOI-2535 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-2535 b sits about 1122 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.
Habitability ScoreUninhabitable
6
Contributing Factors
temperature3
Scorching - hot enough to melt lead, though rock stays solid; no chance for life
atmosphere30

Hydrogen and helium dominated with trace methane and ammonia

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 Field100
Magnetic field provides radiation protection
geology40
Extreme volcanic activity may be hazardous
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
150.00x Earth (8.96e+26 kg)
Radius
5.31x Earth (33,851 km)
This planet: 5.31× Earth radiusEarth: 1× (baseline)
Surface Gravity
5.31x Earth (52.1 m/s²)
Surface Temperature
754 K (481 °C / 898 °F)
Rotation Period
197.8 hours/day (slower than Earth)
This planet: 198 h/dayEarth: 24 h/day

Elemental Composition

How TerraForge built this world

TOI-2535 b, from the Extrasolar Planets Encyclopaedia (found 2026). Measured: 150 Earth masses, 0.0993 AU, a 5256 K G-type star. Composition inferred from a mass of 150 Earths, which is giant territory whatever its 0.18x density suggests, with a day locked to its 8.2-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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