NGC 457

NGC 457
NGC 457
	Open cluster NGC 457 in Cassiopeia
Observation data (J2000.0 epoch)
Right ascension	01h 19m 32.6s
Declination	+58° 17′ 27″
Distance	7.922 kly (2.429 kpc)
Apparent magnitude (V)	6.4
Apparent dimensions (V)	13.0′
Physical characteristics
Other designations	Owl Cluster, E.T. Cluster, Caldwell 13, Cr 12, Mel 7, OCL 321, Lund 43, H VII-42, h 97, GC 256,
Associations
Constellation	Cassiopeia
	See also: Open cluster, List of open clusters

NGC 457 (also designated Caldwell 13, and known as the Dragonfly Cluster, E.T. Cluster, Owl Cluster, Kachina Doll Cluster or Phi Cassiopeiae Cluster)^[2] is an open star cluster in the constellation Cassiopeia.

^ Frinchaboy, Peter M.; et al. (2008). "Open Clusters as Galactic Disk Tracers. I. Project Motivation, Cluster Membership, and Bulk Three-Dimensional Kinematics". The Astronomical Journal. 136 (1): 118–145. arXiv:0804.4630. Bibcode:2008AJ....136..118F. doi:10.1088/0004-6256/136/1/118. S2CID 16641439. See table I, p. 12.
^ "The Dragonfly Cluster (Open Cluster)". Retrieved 2020-10-28.

[aj136-1] Frinchaboy, Peter M.; et al. (2008). "Open Clusters as Galactic Disk Tracers. I. Project Motivation, Cluster Membership, and Bulk Three-Dimensional Kinematics". The Astronomical Journal. 136 (1): 118–145. arXiv:0804.4630. Bibcode:2008AJ....136..118F. doi:10.1088/0004-6256/136/1/118. S2CID 16641439. See table I, p. 12.

[2] "The Dragonfly Cluster (Open Cluster)". Retrieved 2020-10-28.

[1]

[2]