103_hera | mass | 79 (kilograms) <tsp> 103_hera | escapevelocity | 00482 (kilometreperseconds) <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 
103 hera has a mass of 7.9kg and an escape velocity of 0.0482 km per sec. it has an apoapsis of 437170000.0 (kilometres). <sep> no information