K2-3, also known as EPIC 201367065, is a

red dwarf A red dwarf is the smallest kind of star on the main sequence. Red dwarfs are by far the most common type of fusing star in the Milky Way, at least in the neighborhood of the Sun. However, due to their low luminosity, individual red dwarfs are ...

star with three known planets. It is on the borderline of being a late orange dwarf/ K-type star, but because of its temperature, it is classified as a

(4,000 K is typically the division line between spectral class M and K). At a distance of , the star's proximity means it is bright enough to make it feasible for astronomers to study the planets' atmospheres to determine whether they are like Earth's atmosphere and possibly conducive to life.

Planetary system

K2-3 has three confirmed

exoplanet An exoplanet or extrasolar planet is a planet outside the Solar System. The first confirmed detection of an exoplanet was in 1992 around a pulsar, and the first detection around a main-sequence star was in 1995. A different planet, first det ...

s, discovered in 2015. All are low-density super-Earths or sub-Neptunes, with the outermost orbiting near the inner edge of the

habitable zone In astronomy and astrobiology, the habitable zone (HZ), or more precisely the circumstellar habitable zone (CHZ), is the range of orbits around a star within which a planetary surface can support liquid water given sufficient atmospheric pressu ...

References

{{DEFAULTSORT:K2-3 J11292037-0127173 K2-3 Leo (constellation) M-type main-sequence stars Planetary transit variables Planetary systems with three confirmed planets