NGC 457 (also designated Caldwell 13, and known as the Dragonfly Cluster, E.T. Cluster, Owl Cluster, Kachina Doll Cluster or Phi Cassiopeiae Cluster) is an open star cluster in the constellation Cassiopeia.
Along with Delta Cep, Zeta appears to be part of the Cepheus OB6 association (centered at 880 light years), an expanding group of massive stars that share a common birthplace.