NGC 7822 is a young star forming complex in the constellation
of Cepheus. The complex encompasses the emission region designated
Sharpless 171, and the young cluster of stars named Berkeley 59.
The complex is believed to be some 800-1000 pc distant, with
the younger components aged no more than a few million years.
The complex also includes one of the hottest stars discovered
within 1 kpc of the Sun, namely BD+66 1673, which is an eclipsing
binary system consisting of an O5V that exhibits a surface temperature
of nearly 45000 K and a luminosity ~100000 times that of the Sun.The
star is one of the primary sources illuminating the nebula and shaping
the complex's famed pillars of creation-type formations,