Constellation: Monoceros
Distance: 5200 light years
Apparent Magnitude: 9
Apparent Dimensions: 1.3 degrees
Actual Radius: 65 light years

The Rosette Nebula is such a large and complex object that there are many NGC designations for its various parts, however, NGC2237 is usually used to denote the whole nebula.

NGC 2237 – Part of the nebulous region (Also used to denote whole nebula)
NGC 2238 – Part of the nebulous region
NGC 2239 – Part of the nebulous region (Discovered by John Herschel)
NGC 2244 – The open cluster within the nebula (Discovered by John Flamsteed in 1690)
NGC 2246 – Part of the nebulous region