Ia超新星
The first supernova detected in NGC 7753 was SN 2006A in January 2006. It was followed four months later by SN 2006ch, a Type Ia supernova. In January 2013 another Type Ia supernova, SN 2013Q, was detected, and in August 2015 a Type II supernova, SN 2015ae, was discovered.