The Iris Nebula (also known as NGC 7023 and Caldwell 4) is a bright reflection nebula in the constellation Cepheus. The designation NGC 7023 refers to the open cluster within the larger reflection nebula designated LBN 487.
Owing to adverse winds and calms, it was not until August 9 [in 1881] that we raised the high lands of the Aleutian peninsula to the eastward of Ounimak Pass. A succession of calm days left us at the mercy of the currents, which here are strong to the eastward, and carried us in sight of Kadiak, before a breeze sprung up that would enable us to bear up for the pass.