Sh 2-126
Sh 2-126 is a large emission nebula and molecular cloud complex in the constellation Lacerta. It is a prominent member of the Lacerta OB1 association.
The primary source of ionization is the bright O-type star 10 Lacertae, a member of the Lacerta OB1 association. Additional ultraviolet radiation comes from other massive stars in the association, as well as from the embedded Herbig Ae/Be star V375 Lacertae.