103_hera | discoverer | james_craig_watson <tsp> james_craig_watson | nationality | canada <tsp> james_craig_watson | deathplace | madison_wisconsin <tsp> james_craig_watson | deathcause | peritonitis <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 was discovered by james craig watson. he was a canadian national who died in madison. wisconsin of peritonitis.discovered by canadian-american astronomer james craig watson on september 7, 1868