Iris Nebula is located approximately 1300 light years away in the
constellation of Cepheus, the king. It is a 60-light-year wide reflection
nebula embedded within a large cloud of interstellar dust. It is
illuminated by a very young, hot star (SAO 19158) that is 10 times
larger than our Sun.
NGC 7023 is actually the open star cluster within the nebulosity.
The nebula itself is designated as LBN 487 or vdB 139. It was first
discovered by William Herschel in 1794.