2MASS J0441+2301
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2MASS J0441+2301 is a young quadruple system hosting a planetary-mass object, a red dwarf star and two brown dwarfs, approximately 470 light years away.
2MASS J04414489+2301513 is a brown dwarf with a companion about 5–10 times the mass of Jupiter.
Planetary-mass object
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A planetary-mass object (PMO), planemo, or planetary body is, by geophysical definition of celestial objects, any celestial object massive enough to achieve hydrostatic equilibrium, but not enough to sustain core fusion like a star.
The planetary-mass moons to scale, compared with Mercury, Venus, Earth, Mars, and Pluto (the other planetary-mass objects beyond Neptune have never been imaged up close). Borderline Proteus and Nereid (about the same size as round Mimas) have been included. Unimaged Dysnomia (intermediate in size between Tethys and Enceladus) is not shown; it is in any case probably not a solid body.
Planetary-mass satellites larger than Pluto, the largest Solar dwarf planet.
The dwarf planet Pluto
Artist's impression of a super-Jupiter around the brown dwarf 2M1207.