V630 Cyg is most likely undergoing a superoutburst YYYYMMDD(UT) mag observer 20100720.725 <176C (Hiroyuki Maehara) 20100909.891 15.37CV (Jose Castillo Escudero) 20100916.765 150C (Hiroyuki Maehara) 20100917.522 152C (Hiroyuki Maehara)