17 x 600 sec Ha + (3 x600+4 x900 + 3 x1200 sec OIII) all at iso 1600.
This image is part of a very large area of emission nebulosity located in the constellation Cepheus, right at the Cepheus/Cassiopeia border.It lies at the edge of a giant molecular cloud about 3,000 light-years away. The complex encompasses the emission region Sharpless 2-171, and the young open cluster Berkeley 59, whose younger stars are aged no more than a few million years.
The complex also includes one of the hottest stars discovered within 1 kpc of the Sun, BD+66 1673. It is an eclipsing binary system consisting of an O5 V star that exhibits surface temperatures of nearly 45000 K, and a luminosity 100,000 times the Sun's. The star is one of the nebula's primary sources of illumination, shaping the complex's "pillars of creation"-type formations. Stars could be forming by gravitational collapse inside these pillars, but stellar winds and radiation will ultimately erode them away.