101_helena | periapsis | 3316830000 (kilometres) <tsp> 101_helena | epoch | 2006-12-31 <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 periapsis of 101 helena. which has the epoch date of 31 december 2006. is 331683000.0 km.no information