The biggest star known to date is UY Scuti, a red supergiant in the constellation Scutum. It has a radius of about 1708 solar radii and a mass of about 30 solar masses. The smallest star known to date is EBLM J0555-57Ab, a brown dwarf in the constellation Pisces. It has a radius of about 0.84 solar radii and a mass of about 85 Jupiter masses.