query: What is the largest asteroid?
passage: List of exceptional asteroids
The largest asteroids with an accurately measured mass, due to the fact that they have been (and are being) studied by the probe Dawn, are 1 Ceres with a mass of 939.3 ± 0.5×1018 kg, and 4 Vesta at 259.076 ± 0.001×1018 kg. The third-largest asteroid with an accurately measured mass, due to the fact that it has moons, is 87 Sylvia at 14.78 ± 0.06×1018 kg.
passage: Mario Jurić
Together with prolific amateur astronomer Korado Korlević, Jurić has co-discovered 125 asteroids, and one comet, 183P/Korlević-Jurić. He took part in discovery of the Sloan Great Wall, at the time the largest known structure in the Universe. His co-discovery, the Koronian asteroid 22899 Alconrad is one of the smallest known binary asteroids in the main-belt.