alf85 wrote:
You are saying supermoon, if you are talking about the moon on Jan 31 2018, it is not a superoon, it is a Blue moon,so called because it is the second full moon of this month. Regards, Alfie.
According to NASA, it is not only a blue moon, but also a supermoon and a blood moon if you are in an area where the lunar eclipse affects the observed color.