Rosette Nebula and open cluster NGC 2244

58d5574edace6a38a82c57c04bd7b395.1824x0_q100_watermark_watermark_opacity-10_watermark_position-6_watermark_text-Copyright Chris Madson
The Rosette Nebula (also known as Caldwell 49) is a large, circular H II region 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 starsof the cluster having been formed from the nebula’s matter.
The cluster of stars is visible in binoculars and quite well seen in small telescopes while the nebula itself is more difficult to spot visually and requires a telescope with a low magnification. A dark site is a must to see it. Photographically the Rosette Nebula is easier to record and it is the only way to record the red color which is not seen visually.

Imaging telescopes or lenses: Orion ED80
Imaging cameras: SBIG ST-10 XME
Mounts: Mountain Instruments MI-250
Guiding telescopes or lenses: Astro-Tech 8x50mm Finder Guidescope
Guiding cameras: Starlight Xpress Lodestar
Software: Main Sequence Software Sequence Generator Pro, PHD guiding, PixInsight
Filters: Astrodon Ha 5nm, Astrodon SII 5nm
Accessories: Astro-Tech 2″ Field Flattener, Shoestring Astronomy FCUSB, SBIG CFW 10, Moonlite CF 2″ focuser with high resolution stepper
Dates: April 7, 2013
Astrodon Ha 5nm: 4×600″ -30C bin 1×1
Astrodon SII 5nm: 4×600″ -30C bin 1×1
Integration: 1.3 hours
Darks: ~20
Flats: ~20
Bias: ~200

Autor: Chris Madson

AstroPhotography of the day by SPONLI

13 February 2014

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