101_helena | discoverer | james_craig_watson <tsp> james_craig_watson | almamater | university_of_michigan <tsp> 101_helena | orbitalperiod | 15166700000000003 (days) <tsp> james_craig_watson | nationality | canada <tsp> james_craig_watson | deathplace | madison,_wisconsin <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 
the discoverer of 101 helena is james craig watson. a canadian national and graduate of the university of michigan who died in madison. wisconsin. 101 helena has an orbital period of 1516.6700000000003 days.helena was discovered by canadian-american astronomer j. c. watson in 1868