(33128) 1998 BU48
, also written 1998 BU48, is a trans-Neptunian object and centaur from the outer Solar System. It has an aphelion of 46.081 AU and perihelion of 20.405 AU. It was discovered in 22 January 1998 by Nichole M. Danzl at Kitt Peak. It measures 213 km in diameter.