NGC2237 Rosette Nebula in Monocerus
Here are five variations of the Rosette Nebula taken over three nights at the end of December 2014
The first is just Ha.
The next is also just Ha but in false red using one of Noel’s actions in photoshop.
The next is using Ha and OIII data only
The final two versions are using all three narrow band filters, Ha, OIII and SII.
The first is a traditional colour palette and the last is using the hubble palette.
The Rosette Nebula is a vast cloud of dust and gas extending over 1 degree across and covers an area about 5 times that of a full Moon. However only the star cluster in the middle is readily visible through binoculars or small telescope.
The Nebula is an H!! Region at a distance of some 5200 light years and the central hole is about 30 light years across. The nebula is estimated to contain around 10,000 solar masses.
The data for these was taken over three nights at the end of December 2014 and consists of Ha 24 x 10 mins binned 1x1, OIII 16 x 5mins binned 2x2, SII 10 x 10 mins binned 2x2 with my Megrez 90 and Atik 460EX camera with Astrodon NB filters.