Köhler's Deepsky Catalogue is an astronomical catalogue assembled by Johann Gottfried Köhler in 1778. It was originally compiled in a letter to Johann Elert Bode. Although not numbered, two additional objects are listed by Köhler that he had recently discovered. In total, the catalogue contains eleven globular clusters, four open clusters, two spiral galaxies, two elliptical galaxies, one emission nebula, one planetary nebula, two asterisms, and three lost objects. At Köhler's time, all these various objects were referred to as nebulae.
List
Mistakes Köhler identified Bode's Galaxy and the Cigar Galaxy both under K 8. They are now clafiried as K 8A and K 8B respectively. K 9 is not an object but an asterism made of Rho Ursae Majoris, Sigma1 Ursae Majoris, and Sigma2 Ursae Majoris. K 12 is also an asterism, comprising 63, 64, 65, and 66 Andromedae. K 16 is considered a lost object, described as being located near 3 Vulpeculae. For K 17A and K 17B, Köhler describes two nebulas in the constellation Canes Venatici. However, it is unknown what objects this refers to.
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