Original: Given the rapid rotation , rare for objects so large , Varuna is thought to be an elongated spheroid ( ratio of axis 2:3 ) , with a mean density around 1g/cm ³ ( roughly the density of water ) .
Simplified: Given the fast rotation , which is not common for objects so big , Varuna is thought to be a stretched spheroid , with a density around 1g/cm ³ ( close to the density of water ) .