101_Helena | discoverer | James_Craig_Watson James_Craig_Watson | almaMater | University_of_Michigan 101_Helena | periapsis | 331683000.0 (kilometres) James_Craig_Watson | nationality | Canada James_Craig_Watson | deathPlace | Madison,_Wisconsin
James Craig Watson was a Canadian national, who studied at the University of Michigan and died in Madison, Wisconsin. He discovered 101 Helena which has a periapsis of 331683000.0 (kilometres).