re: Lots about brown dwarfs...
In the may issue of Ciel et Espace.
Brown dwarf types: temperatures chemicals on the surface
M 2000 K to 3000K CO-H2O-VO-TO
L 1500 K to 2000K ZrO2-Al2O3-MgSiO2
T 1200 K to 1500K CH4-SiO2
T 600 K to 1200K CH4-SiO2-NH3
Undefined 500 K (not observed)
Jupiter 128 K (looks like a brown dwarf but isn't one
Raoul