Rosette Nebula G3

Posted by on Aug 17, 2017

Rosette Nebula G3

The Rosette Nebula (also known as Caldwell 49) is a large spherical H II region (circular in appearance) located near one end of a giant molecular cloud in the Monoceros region of the Milky Way Galaxy. The open cluster NGC 2244 (Caldwell 50) is closely associated with the nebulosity, the stars of the cluster having been formed from the nebula's matter.

The cluster and nebula lie at a distance of some 5,000 light-years from Earth[3]) and measure roughly 130 light years in diameter. The radiation from the young stars excites the atoms in the nebula, causing them to emit radiation themselves producing the emission nebula we see. The mass of the nebula is estimated to be around 10,000 solar masses.

Raw images:
Ha: 4 x 10min  (Tot: 40min) Bin:1x1
OIII: 2 x 10min  (Tot: 20min) Bin:2x2
SII: 2 x 10min  (Tot: 20min) Bin:2x2
Seeing: 2.5-3"

Equipment used:
ASA N12 Astrograph F/3.6
3" Wynne Corrector 0.95x
Moravian G3 16200 camera @-25C
No guiding

Filter:
Astrodon Ha 3nm, OIII 5nm, SII 5nm

Location/Date:
Valla Observatory (FROSON, Sweden)
January 17, 2017

Image processing:
Images calibrated and processed in AstroPix
Tone-mapped in Photoshop
Image palette:
Hubble palette turquoise modified. 

 Image information:
Scale: 1.14 arcsec/pix
FOW: 80x70 arcmin

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