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ASA ASTROPHOTOGRAPHY LOG: IRIS NEBULA

NGC7023 (Iris Nebula) taken last August 26, 2018 from Al Sadeem Astronomy Observatory using GSO RC 8-inch telescope and ZWO1600MC-Cool CMOS camera; processed in Pixinsight (Image Credit: Aldrin B. Gabuya/Al Sadeem Astronomy)

Caldwell 4 (more commonly known as Iris Nebula) is a bright reflection nebula situated about 1300 light-years away from Earth in the constellation of Cepheus. It was discovered by the English astronomer William Herschel on October 18, 1794. read more