NGC 657
DSS image of NGC 657
Overlaid DSS image of NGC 657, 30' x 30' with north at top and west to the right

Aladin viewer for the region around NGC 657
h 146, GC 388, Lund 52, C 0140+556, OCl 337

Type  Open Cluster
Magnitude  
Size  7'
Right Ascension  1h 43' 29.8"  (2000)
Declination  55° 52' 30" N
Constellation  Cassiopeia
Description  Cl, pRi, st12
Observing Notes

Captain William Henry Smyth
Sep 28, 1835    No. 6 The Crescent, Bedford, England (map)
150mm f/17.6 refractor by Tully 1827

A double star [HD 10495], A 8, pale white; B 12, dusky. In a loose cluster [NGC 657], between the weapon of Perseus and the elbow of Cassiopea, one-third the distance from α of the latter to α of the former constellation: and it may be fished up by carrying a line from κ Cassiopeae through γ to double the distance beyond.

It was discovered by H., and consists of a gathering of small stars, of 10th to 13th magnitude, divided into two distinct groups; one sf of A, and the other nf. It is a neat but difficult double star, whose angle of position and distance from each other, were very carefully estimated. These observations were made during a vivid and strongly coloured Aurora Borealis.
― A Cycle of Celestial Objects Vol II, The Bedford Catalogue, William Henry Smyth, 1844
Other Data Sources for NGC 657
Associated objects for NGC 657
Nearby objects for NGC 657
1 object found within 120'
HD 10495
Credits...

Drawings, descriptions, and CCD photos are copyright Andrew Cooper unless otherwise noted, no usage without permission.

A complete list of credits and sources can be found on the about page

NGC 657