<P> Pallas is unusual in that, like Uranus, it rotates on its side, with its axis of rotation tilted at high angles to its orbital plane . Its composition is similar to that of Ceres: high in carbon and silicon, and perhaps partially differentiated . Pallas is the parent body of the Palladian family of asteroids . </P> <P> Hygiea is the largest carbonaceous asteroid and, unlike the other largest asteroids, lies relatively close to the plane of the ecliptic . It is the largest member and presumed parent body of the Hygiean family of asteroids . </P> <Table> <Tr> <Th_colspan="13"> Attributes of largest asteroids </Th> </Tr> <Tr> <Th> Name </Th> <Th> Orbital radius (AU) </Th> <Th> Orbital period (years) </Th> <Th> Inclination to ecliptic </Th> <Th> Orbital eccentricity </Th> <Th> Diameter (km) </Th> <Th> Diameter (% of Moon) </Th> <Th> Mass (× 10 kg) </Th> <Th> Mass (% of Ceres) </Th> <Th> Density (g / cm) </Th> <Th> Rotation period (hr) </Th> <Th> Axial tilt </Th> <Th> Surface temperature </Th> </Tr> <Tr> <Th> Vesta </Th> <Td> 2.36 </Td> <Td> 3.63 </Td> <Td> 7.1 ° </Td> <Td> 0.089 </Td> <Td> 573 × 557 × 446 (mean 525) </Td> <Td> 15% </Td> <Td> 260 </Td> <Td> 28% </Td> <Td> 3.44 ± 0.12 </Td> <Td> 5.34 </Td> <Td> 29 ° </Td> <Td> 85--270 K </Td> </Tr> <Tr> <Th> Ceres </Th> <Td> 2.77 </Td> <Td> 4.60 </Td> <Td> 10.6 ° </Td> <Td> 0.079 </Td> <Td> 975 × 975 × 909 (mean 953) </Td> <Td> 28% </Td> <Td> 940 </Td> <Td> 100% </Td> <Td> 2.12 ± 0.04 </Td> <Td> 9.07 </Td> <Td> ≈ 3 ° </Td> <Td> 167 K </Td> </Tr> <Tr> <Th> Pallas </Th> <Td> 2.77 </Td> <Td> 4.62 </Td> <Td> 34.8 ° </Td> <Td> 0.231 </Td> <Td> 580 × 555 × 500 (mean 545) </Td> <Td> 16% </Td> <Td> 210 </Td> <Td> 22% </Td> <Td> 2.71 ± 0.11 </Td> <Td> 7.81 </Td> <Td> ≈ 80 ° </Td> <Td> 164 K </Td> </Tr> <Tr> <Th> Hygiea </Th> <Td> 3.14 </Td> <Td> 5.56 </Td> <Td> 3.8 ° </Td> <Td> 0.117 </Td> <Td> 530 × 407 × 370 (mean 435) </Td> <Td> 12% </Td> <Td> 87 </Td> <Td> 9% </Td> <Td> 2.76 ± 1.2 </Td> <Td> 27.6 </Td> <Td> ≈ 60 ° </Td> <Td> 164 K </Td> </Tr> </Table> <Tr> <Th_colspan="13"> Attributes of largest asteroids </Th> </Tr>

What is the name of the largest asteroid it is approximately 1000 km in diameter