103_hera | epoch | 2011-08-27 <tsp> 103_hera | orbitalperiod | 1622213 (days) <tsp> 103_hera | periapsis | 3712400000 (kilometres) <tsp> 103_hera | apoapsis | 4371700000 (kilometres) <sep> hera (minor planet designation: 103 hera) is a moderately large main-belt asteroid with an orbital period of 444 years it was discovered by canadian-american astronomer james craig watson on september 7, 1868, and named after hera, queen and fifth in power of the olympian gods in greek mythology this is a stony s-type asteroid with a silicate surface composition photometric observations made in 2010 at the organ mesa observatory at las cruces, new mexico, and the hunters hill observatory at ngunnawal, australian capital territory, give a synodic rotation period of 23740±0001 h the bimodal light curve shows a maximum brightness variation of 045 ± 003 in magnitudemeasurements made with the iras observatory give a diameter of 9158±414 km and a geometric albedo of 019±002 
the apoapsis of 103 hera is 437170000.0 kilometres and the periapsis is 371240000.0 kms. with an epoch date of 31 july 2016 it has an orbital period of 1622.213 days.no information