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Entering orbit…
Habitability
0/ 100
Uninhabitable
CRTS J1122-1110 b rendered in TerraForge from its measured mass, orbit and star

CRTS J1122-1110 b

Also written CRTS J1122-1110b, CRTS J1122 1110b, CRTS J1122 1110 b

Brown Dwarf1125 light years awayFound 2012
Mass
4450.00 × Earth
Radius
12.30 × Earth
Gravity
29.41 g
Surface (est.)
502 K
Year
1.1 hrs
From Earth
1,125 ly
Mass
4450.00 × Earth
Radius
12.30 × Earth
Gravity
29.41 g
Surface (est.)
502 K
Year
1.1 hrs
From Earth
1,125 ly

CRTS J1122-1110 system

Type
White dwarf
Spectral type
DA
Temperature
10,400 K
Radius
0.01 ☉
Mass
0.83 ☉
Planets
1
Luminosity
1.05e-3 ☉

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

CRTS J1122-1110 b0.010 AUYou are here4,450 M⊕
Habitable zone

Star and planets drawn to scale: CRTS J1122-1110 b is 11 times as wide as its star. 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

Estimated: this planet doesn't transit its star, so its size is inferred, not measured

CRTS J1122-1110 b, from the Extrasolar Planets Encyclopaedia (found 2012). Measured: 4450 Earth masses, 0.00235 AU, a 10400 K B-type star. Composition inferred from a mass of 4450 Earths, which is giant territory whatever its 2.39x density suggests, with a day locked to its 0.0-day year, as anything orbiting this close would be, slowed to 3.82 hours: an assumed spin is not allowed to push a real world past breakup.

Surface. No surface: a cooling failed star, its methane atmosphere absorbing so much red light it would look magenta to the eye

Brown Dwarf
Magnetic FieldNone Activity
CRTS J1122-1110 b has an unusual composition that doesn't fit standard classifications, or lacks the elements needed for complex geological processes.
Barren worlds can form from uncommon element combinations or may be remnants of larger bodies that lost their atmospheres and volatile materials.
Classification Criteria:
Composition doesn't match standard planet typesMass: 4450.0x EarthTemperature: 502K

Reading CRTS J1122-1110 b’s atmosphere

Dominant elements: H, He, O, C, NThis is what a telescope would measure while CRTS J1122-1110 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.CRTS J1122-1110 b sits about 1125 light-years away. 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.The Little Book of ExoplanetsJoshua WinnHow these worlds are found, and what a measurement can honestly tell us.Exoplanets: Diamond Worlds, Super Earths, Pulsar PlanetsMichael Summers & James TrefilThe strange end of the catalogue — carbon worlds, molten rock, planets orbiting dead stars.
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
0
Contributing Factors
temperature9
Extremely hot - hostile to known life forms
atmosphere9

Hydrogen and helium dominated by methane absorption, with water clouds below

Hydrogen-rich atmosphere typical of gas giants (severely compromised by extreme rotation)
water5
No solid surface — any water is locked in a supercritical mantle and hot ice, not oceans (water stripped by extreme rotation)
magnetic Field20
A strong field, but no surface beneath it — there is nothing here for it to shelter
geology30
Geologically dead - no nutrient recycling
Organic Chemistry80
Core organic elements (CHNO) present
rotation5
Extreme rotation (< 4 hrs) - winds exceeding 1000 mph, constant category 5 hurricanes, uninhabitable surface

Physical Properties

Mass
4450.00x Earth (2.66e+28 kg)
Radius
16.45x Earth (104,792 km)
This planet: 16.45× Earth radiusEarth: 1× (baseline)
Surface Gravity
16.45x Earth (161.4 m/s²)
Surface Temperature
502 K (228 °C / 443 °F)
Rotation Period
3.8 hours/day (faster than Earth)
This planet: 4 h/dayEarth: 24 h/day

Time Dilation

Clocks run 7.8 minutes per year slower than deep space — about 10.4 hours over a lifetime

Elemental Composition

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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