Simplify the following text for a Grade 7 native English-speaking person.
Original: At most oppositions , Hygiea has a magnitude of around +10.2 , which is as much as four orders fainter than Vesta , and will require at least a 4 i telescope to resolve .
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 .