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Charting the system…

K2-3

a real K-star system, 144 light-years away3 planets← Back to Exoplanet Explorer
Host star

K2-3

Type
K-type (Orange)
Spectral type
M V
Temperature
3,844 K
Radius
0.546 ☉
Mass
0.549 ☉
Known planets
3
Luminosity
0.0587 ☉

Published by the NASA Exoplanet Archive. These planets’ temperatures and habitability scores are computed from this star’s measured luminosity, not from a stand-in for its class.

K2-3 b — 0.07 AUK2-3 c — 0.14 AUK2-3 d — 0.20 AUK2-3 bK2-3 cK2-3 d
K2-3 b
K2-3 bSub-NeptuneHabitability 10 · Uninhabitable0.07 AU · 5.11 M⊕
View planet
K2-3 c
K2-3 cSub-NeptuneHabitability 28 · Extremely Harsh0.14 AU · 2.68 M⊕
View planet
K2-3 d
K2-3 dWater-RichHabitability 94 · Highly Habitable0.20 AU · 2.2 M⊕
View planet
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.

Create your free account

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We only keep your email and the username you choose. We never share or sell your email, and we don't send marketing — we use it only to email you a sign-in code. Read our privacy policy.

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