MN18 (original) (raw)

MN18 is a blue supergiant in the constellation of Circinus, about 5.6 kiloparsecs away, or about 18,300 light years away, likely in the open cluster . MN18 is surrounded by a bipolar nebula, quite uncommon around blue supergiants, and some other examples of blue supergiants with bipolar nebulae include HD 168625, Sher 25 and .