NGC NGC 2237
Rosette Nebula
Emission Nebula
Monoceros
Easy
Large HII region surrounding open cluster NGC 2244; excellent narrowband subject.
Angular size
80′ × 60′
Magnitude
9
Best months
Dec-Mar
Constellation
Monoceros
Catalog IDs
NGC 2237;NGC 2238;NGC 2239;NGC 2246;Caldwell 49
Common aliases
Rosette;Caldwell 50 (cluster)