© Raffaele Calcagno
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© Raffaele Calcagno
A Cosmic Rose: NGC 2237 in Monoceros
Photo of the NGC 2237, the Rosette nebula and the star cluster inside it, NGC 2244.
The star cluster, which is estimated to be about 5 million years old, is responsible for the ionisation of the surrounding gas. The mass of the nebula is estimated to be about 10 000 times the mass of our sun, which is relatively massive for a diffuse nebula.
This image uses a SHO palette, I quite like the colours I manage to get, both as the normal and starless images.
I also tried using the Foraxx palette, I think it's a bit less interesting visually, but the dark dust structures seam a bit more visible.
(Image taken using a CarbonStar 150/600 newtonian telescope with a 0.95 coma corrector, ZWO ASI294 monochrome camera ZWO LRGB filters and Baader 6.5nm SHO filter. 5x120s image for each colour filter (RGB), 15x300s for the Ha filter 20x300s for the SII filter and 18x300s for the OIII filter, total imaging time 4h 25min, stacking and processing done in PixInsight.)
final of the Rosette Nebula in SHO coloring with full color stars
Black and White Rosette
NGC 2237 Rosette Nebula
A Cosmic Rose: The Rosette Nebula in Monoceros
The Rosette Nebula, NGC 2237, is not the only cosmic cloud of gas and dust to evoke the imagery of flowers, but it is the most famous. At the edge of a large molecular cloud in Monoceros some 5,000 light years away, the petals of this cosmic rose are actually a stellar nursery. The lovely, symmetric shape is sculpted by the winds and radiation from its central cluster of hot young, O-type stars. Stars in the energetic cluster, cataloged as NGC 2244, are only a few million years young, while the central cavity in the Rosette Nebula, is about 50 light-years in diameter. The nebula can be seen with a small telescope toward the constellation of Monoceros, the Unicorn. This natural appearing telescopic portrait of the Rosette Nebula was made using broadband and narrowband filters, because sometimes roses aren't red. Credit: Jean Dean