101_helena | discoverer | james_craig_watson <tsp> james_craig_watson | almamater | university_of_michigan <tsp> james_craig_watson | nationality | canada <tsp> james_craig_watson | deathplace | madison,_wisconsin <tsp> 101_helena | apoapsis | 4410920000 (kilometres) <sep> helena (minor planet designation: 101 helena) is a large, rocky main-belt asteroid it was discovered by canadian-american astronomer j c watson on august 15, 1868, and was named after helen of troy in greek mythology this object is orbiting the sun with a period of 416 years and an eccentricity of 014 
101 helena. which has an apoapsis of 441092000.0 kms was discovered by the canadian national. james craig watson. his alma mater was the university of michigan and he died in madison. wisconsin.helena was discovered by canadian-american astronomer j. c. watson in 1868