20000 Varuna is a large classical Kuiper belt object. It previously had the provisional designation 2000 WR106 and has been precovered in plates dating back to 1953. It is probably a dwarf planet.The International Astronomical Union has not classified it as a dwarf planet. However, Brown places it on the high end of "highly likely",
Varuna artistic

An artist's impression

and Tancredi (2010) classifies it as "accepted" but has not made a direct recommendation for its inclusion.