NGC 657
 
NGC 657 is a open cluster located in the constellation of Cassiopeia. The NGC is a catalog of 7,840 nebulae, star clusters, and galaxies. Here are the key stats on NGC 657:
| NGC: | NGC 657 | 
| Type: | open cluster | 
| Constellation: | Cassiopeia | 
| Right Ascension: | 01:43:20.80 | 
| Declination: | 55:50:11.00 | 
| Major axis: | 3 ' | 
Right Ascension (RA) units = HH:MM:SS.SS
Declination (Dec) units = DD:MM:SS.SS