101_helena | discoverer | james_craig_watson <tsp> 101_helena | epoch | 2006-12-31 <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 
101 helena was discovered by james craig watson. a canadian. on december 31. 2006. he died in madison. wisconsin.helena was discovered by canadian-american astronomer j. c. watson in 1868