M1–78: a nitrogen-rich Galactic compact H II region beyond the Perseus arm N. L. Martín-Hernández, C. Esteban, A. Mesa-Delgado, A. Bik and E. Puga A&A, 482 1 (2008) 215-227 Published online: 18 February 2008 DOI: 10.1051/0004-6361:20079039