Size comparison: 10 Hygiea vs Ceres

Size comparison between 10 Hygiea and Ceres.

10 Hygiea is a major asteroid, possibly a dwarf planet that is located in the main asteroid belt. It is the 4th largest asteroid in the solar system in terms of mass and volume. This celestial body is almost spherical.

Ceres is the smallest dwarf planet in the solar system. It is also the largest known asteroid. Unlike 10 Hygiea, there is water in the form of ice on its surface. It is assumed that there is possibly an ocean of liquid water between the core and the ice sheet as on the Europa moon. What makes this element a candidate for the presence of extraterrestrial life.

Object	10 Hygiea	Ceres
Type	Dwarf planet	Dwarf planet
Age	4.5 billion years	4.5 billion years
Diameter	434 km	938 km
Mean radius	217 km	469 km
Mass	8.32 × 1019 kg	1.3 × 1022 kg
Orbital period	5.57 years	4.6 years
Rotation duration	13 hours	9 hours
Surface temperature (average)	164 K -109 °C -164 °F	172 K -101 °C -150 °F
Surface gravity	0.091 m/s²	0.28 m/s²
Mean density	1.94 g/cm3	2.16 g/cm3
Orbital distance	469 million km	419 million km
Circumference	1,363 km	2,946 km
Surface area	0.59 million km²	2.7 million km²
Volume	42.8 × 106 km3	4.3 × 108 km3
Escape velocity	0.21 km/s	1.21 km/s
Average orbital speed	16.76 km/s	0.51 km/s
Aphelion	525 million km	445 million km
Perihelion	413 million km	382 million km
Semi major axis	469 million km	414 million km
Inclination	3.83°	10.59°
Crust composition	silicate	water ice, silicate
Distance from the Milky Way center	27,200 light years	27,200 light years

Note: if one of the objects is not visible, it just means that it is too tiny to be displayed compared to the other one.