C6: the cat's eye nebula (image credit: sdss)
Stephen Saber
Sir Patrick's deepsky object selections were based on targets that have scientifically special or unique properties (not just added as another pretty face or having a nickname) along with brightness. This Hubble's Caldwell Catalog link leads to the proper Gen-C/NASA primary identifiers, the old boomer NGC#, and each Caldwells' claim to fame.
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