Collinder catalogue

• The catalogue contains 471 objects: 453 open clusters, 11 globular clusters, 6 asterisms, and 1 stellar moving group.
• Objects are spread out across the entire celestial sphere.
• Cr 8 is the northernmost Collinder object, located at a declination of +85º in the constellation Camelopardalis.
• Cr 411 is the southernmost Collinder object, located at a declination of -79º in the constellation Octans.

The Collinder Catalogue contains 29 objects which are part of the Messier catalogue:

The Collinder catalogue pre-dates the Caldwell catalogue by 64 years. The Collinder catalogue contains 28 objects which are members of the Caldwell catalogue:

Collinder 346 was misidentified as an open cluster when it's actually a globular cluster.

There are some errors in Collinder's list or references to it. For example:[6][7]

• Cr 21, 27, 57, 396, 399, and 426 are asterisms.
• Cr 32, 33, and 34 all refer to parts of the much larger IC 1848.
• There is "some doubt" as to whether or not Cr 84, 182, 221, 254, 265, 269, 283, 294, 336, 387, 404, 425, 456, and 458 are open clusters.
• The positions of Cr 109 and 185 are inaccurate.
• Cr 202 is actually the central condensation of the much larger Cr 199.
• Cr 220 was believed by Collinder to be NGC 3247 when in reality he discovered a "new" open cluster.
• Cr 234 was applied to the southern section of the much larger Cr 233.
• Cr 240 is actually the central condensation of the much larger Cr 239.
• Cr 267, 328, 330, 346, 364, 366, 368, 381, 395, 409, and 414 are globular clusters.
• Cr 334 and 335 are duplicate listings of the same object.
• The original alias given for Cr 339 is the galaxy NGC 6393. The correct alias for Cr 339 is the open cluster NGC 6396.
• The original alias given for Cr 371 is of the nebula which surrounds an open cluster he discovered. He apparently did not know he was first to make the distinction.
• Cr 374 is imbedded within the much larger Messier 24.
• Collinder erroneously believed Messier 11 was a globular cluster.
• Collinder’s description of Messier 73 is actually for Messier 72, a globular cluster, and not the object he intended for Cr. 426.

• List of astronomical catalogues
• Melotte catalogue - a similar catalogue of star clusters published by Philibert Jacques Melotte in 1915.
• Trumpler catalogue - a similar catalogue of open star clusters published by Robert Julius Trumpler in 1930, one year before Per Collinder.

Wikimedia Commons has media related to Collinder catalogue.

• An annotated version of the Collinder catalogue by Thomas Watson