Id24
The discoverer of 101 Helena is James Craig Watson, a Canadian, whose Alma mater is the University of Michigan. He died in Madison, Wisconsin. 101 Helena has an absolute magnitude of 8.33.
101 Helena | discoverer | James Craig Watson James Craig Watson | alma mater | University of Michigan 101 Helena | absolute magnitude | 8.33 James Craig Watson | nationality | Canada James Craig Watson | death place | Madison, Wisconsin