Planetary nebula Abell 12 (PK 198-06.1). Very close (49.8") to the star μ (mu) Orionis

μ Orionis is a double binary, 4 star system, with a total magnitude of 4.13
Nebula spectrum

HAG 24" RC, Moravian G4-9000
L:4x120s, RGB:3x120s, FoV 15' x 15'
2018-02-11 @ 21:48 UT