▁the ▁ring ▁is ▁ 2 2 5 ▁ ± ▁ 8   km / s ▁and ▁there ▁is ▁very ▁little ▁rotation ▁seen ▁( 4 7 ▁ ± ▁ 8   km / s ). ▁ ▁It ▁also ▁has ▁a ▁star ▁formation ▁rate ▁of ▁approximately ▁ 4 . 6 8 ▁solar ▁masses ▁per ▁year . ▁ ▁The ▁re dd ish ▁bul ge ▁in ▁the ▁main ▁ring ▁is ▁thought ▁to ▁be ▁the ▁original ▁gal actic ▁nucle us ▁of ▁the ▁primary ▁galax y ▁and ▁compr ises ▁ 3 0 – 5 0 % ▁of ▁the ▁total ▁mass ▁of ▁the ▁galax y . ▁ ▁Sm aller ▁galax y ▁The ▁smaller ▁companion ▁galax y ▁( left ▁side ) ▁also ▁contains ▁an ▁X - ray ▁source ▁which ▁may ▁be ▁a ▁poor ly ▁fed ▁black ▁hole . ▁ ▁References ▁ ▁External ▁links ▁▁▁ ▁Category : C et us ▁( const ell ation ) ▁Category : R ing ▁galaxies ▁ 1 1 8 9 0 ▁Category : A stronom ical ▁X - ray ▁sources ▁Category : A stronom ical ▁objects ▁discovered ▁in ▁ 1 8 9 3 ▁Category : IC ▁objects ▁ 1 4 7 <0x0A> </s> ▁Nom bar ath i ▁Po ov u ▁() ▁is ▁a ▁ 1 9 8 7 ▁Mal ay al am ▁drama ▁film , ▁written ▁and ▁directed ▁by ▁P . ▁Pad mar aj an . ▁It ▁stars ▁Mad hav i , ▁Baby ▁Son ia , ▁M amm oot ty , ▁Sh ari ▁and ▁Un nim ary . ▁Its ▁story ▁is ▁about ▁the ▁deep ▁relationship ▁between ▁G