CHXR 73 is a

star A star is a luminous spheroid of plasma (physics), plasma held together by Self-gravitation, self-gravity. The List of nearest stars and brown dwarfs, nearest star to Earth is the Sun. Many other stars are visible to the naked eye at night sk ...

in the

constellation A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object. The first constellati ...

Chamaeleon, about 620 light-years away from Earth. The star is located within Cha I, a

molecular cloud A molecular cloud—sometimes called a stellar nursery if star formation is occurring within—is a type of interstellar cloud of which the density and size permit absorption nebulae, the formation of molecules (most commonly molecular hydrogen, ...

. It has a low temperature of 3,490 K typical of

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 ...

s, but unlike typical red dwarfs it has an unusually large radius of —this is because of its young age, only 8 million years.

Planetary system

A companion, CHXR 73 b, has been found via direct imaging. CHXR 73 has a mass of about 12 Jupiters. This is close to the upper mass limit for planets, making its classification difficult.

References

{{DEFAULTSORT:CHXR 73 Chamaeleon M-type main-sequence stars Emission-line stars Planetary systems with one confirmed planet J11062877-7737331