(T, T-class star, T dwarf)
(type of dwarf with a temperature in the vicinity of 1000K)
A T-type star (T-class star or T dwarf) is a star of the T-class, a
spectral class, which encompasses some cool brown dwarfs,
specifically with methane in their spectra.
As of 2011, 207 are known.
(star type,spectral type)
brown dwarf (BD)
Y-type star (Y)