Brown dwarf
Superlative brown dwarfs
WD 0137-349 B: first confirmed brown dwarf to have survived the primary's red giant phase. In 1984, it was postulated by some astronomers that the Sun may be orbited by an undetected brown dwarf (sometimes referred to as Nemesis) that could interact with the Oort cloud just as passing stars can.

Brown dwarf

Section Title: Superlative brown dwarfs
Table Section Text: WD 0137-349 B: first confirmed brown dwarf to have survived the primary's red giant phase. In 1984, it was postulated by some astronomers that the Sun may be orbited by an undetected brown dwarf (sometimes referred to as Nemesis) that could interact with the Oort cloud just as passing stars can.

Record	Name	Spectral type	RA/Dec	Constellation	Notes

Oldest

Youngest

Most massive	SDSS J010448.46+153501.8	usdL1.5	01h04m48.46s +15°35'01.8"	Pisces	distance is ~180–290 pc, mass is ~88.5-91.7 MJ. Transitional brown dwarfs.

Metal-rich

Metal-poor	SDSS J010448.46+153501.8	usdL1.5	01h04m48.46s +15°35'01.8"	Pisces	distance is ~180–290 pc, metallicity is ~0.004 ZSol. Transitional brown dwarfs.

Least massive	OTS 44	M9.5	Chamaeleon	Has a mass range of 11.5 MJ-15 MJ, distance is ~550 ly

Largest

Smallest	EBLM J0555-57Ab

Fastest rotating	WISEPC J112254.73+255021.5	T6	11h22m54.73s +25°50'21.5"	Leo	Rotational period of 17, 35, or 52 mins

Farthest	WISP 0307-7243	T4.5	03h07m45.12s −72°43'57.5"	Distance: 400 pc

Nearest	Luhman 16	Distance: ~6.5 ly

Brightest	Teegarden's star	M6.5	jmag=8.4

Dimmest	WISE 1828+2650	Y2	jmag=23

Hottest

Coolest	WISE 0855−0714	Temperature −48 to −13 C

Most dense	COROT-3b	Transiting brown dwarf COROT-3b has 22 MJ with a diameter 1.01±0.07 times that of Jupiter. It is slightly denser than osmium at standard conditions.

Least dense

Sentence(s)

WISE 0855−0714 had a temperature of −48 to −13 °C.

final_sentence: WISE 0855−0714 had a temperature of −48 to −13 °C.