Original: At most oppositions , Hygiea has a magnitude which is four orders fainter than Vesta , and will require at least a 100 mm ( 4-inch ) telescope to resolve , while at a perihelic opposition , it may be resolvable with 10x50 binoculars .
Simplified: At most oppositions , Hygiea has a magnitude of around +10.2 , which is as much as four orders fainter than Vesta , and will need at least a 4-inch telescope to resolve .