仙(xian)(xian)王(wang)(wang)(wang)座(zuo)(zuo)MY(MY Cephei)是(shi)(shi)一顆(ke)位(wei)于仙(xian)(xian)王(wang)(wang)(wang)座(zuo)(zuo)的(de)紅特超(chao)巨星(xing)(xing),位(wei)于仙(xian)(xian)王(wang)(wang)(wang)座(zuo)(zuo)的(de)疏(shu)散星(xing)(xing)團NGC 7419中,是(shi)(shi)一顆(ke)已知體積(ji)最大的(de)恒星(xing)(xing)之一。其(qi)半徑是(shi)(shi)太陽(yang)的(de)2061倍,僅(jin)次于史(shi)蒂(di)文森(sen)2-18(2158倍太陽(yang)半徑)和(he)大犬座(zuo)(zuo)VY(2069倍太陽(yang)半徑)。它是(shi)(shi)一個半規則變星(xing)(xing),視星(xing)(xing)等最大為+14.40,最小(xiao)為+15.50,其(qi)恒星(xing)(xing)光(guang)譜是(shi)(shi)M7.5I C。仙(xian)(xian)王(wang)(wang)(wang)座(zuo)(zuo)MY位(wei)于赤(chi)經22時(shi)54分31.6975860144秒,赤(chi)緯+60° 49′ 38.970114015″,距離地球3513.18光(guang)年(nian)。