In
astronomy, the
Collinder catalog is a catalog of 471
open clusters by Swedish astronomer
Per Collinder. It was published in 1931 as an appendix to Collinder's paper
On structural properties of open galactic clusters and their spatial distribution. Catalog objects are denoted by
Collinder, e.g. "Collinder 399". Dated prefixes include as
Col + catalog number, or
Cr + catalog number, e.g. "Cr 399".