Crescent Nebula (1) Crescent Nebula (1) Crescent Nebula (1) object name: Crescent Nebula object type: emission nebula coordinates: 20 12 07.0, +38 21 18 (2000) constellation: Cygnus alternate names: Caldwell 27, Sharpless 105, NGC 6888 observation filters: L, R, G, B