| Proper Name | None | | Designation | 2MASS 0122-2439 B (2MASS J01225093-2439505 B) | | Classification | Brown Dwarf (L-type) | | Orbital Period | Not known | | Mean Distance from 2MASS 0122-2439 | c.7,800 million km
52 AU | | Mass | Uncertain; 11 to 27 x Jupiter | | Diameter | Not known | | Temperature | c.1,400 K (c.1,100°C) | | Notes | An immense planet-like body, at least 11 times the mass of Jupiter and perhaps as many as 27 times that mass, 2MASS 0122-2439 b is a brown dwarf, a body nearly massive enough to form a star in its own right. |
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