Imaging telescopes or lenses: William Optics RedCat 51 Petzval APO
Imaging cameras: ZWO ASI 183MM Pro
Mounts: Sky-Watcher EQ-6R Pro SynScan
Guiding telescopes or lenses: The Bellavia Micro 25mm f/6.2 guidescope
Guiding cameras: ASI224MC
Software: Pleiades Astrophoto PixInsight · IDEIKI AstroPhotography Tool (APT) · Topaz Denoise AI · Stark Labs Nebulosity 4.2 · Digital Photo Professional · Annie's Astro Actions V7 · Noel Carboni's Astro Tools for PhotoShop Noel Carboni Actions · SharpCap Pro 3.2 · PHD2 Guiding
Filters: Astronomik 6nm Ha · Astronomik 6nm OIII · R · B · G
Dates:Jan. 10, 2021
Frames:
Astronomik 6nm Ha: 20x240" (gain: 111.00) -15C bin 1x1
Astronomik 6nm OIII: 20x240" (gain: 111.00) -15C bin 1x1
B: 30x60" (gain: 111.00) -15C bin 1x1
G: 30x60" (gain: 111.00) -15C bin 1x1
R: 30x60" (gain: 111.00) -15C bin 1x1
Integration: 4.2 hours
Darks: ~30
Flats: ~30
Flat darks: ~30
Avg. Moon age: 26.60 days
Avg. Moon phase: 9.40%
Bortle Dark-Sky Scale: 4.00
Mean SQM: 20.50
Mean FWHM: 4.00
Temperature: -5.00
Astrometry.net job: 4145003
RA center: 6h 32' 12"
DEC center: +5° 0' 43"
Pixel scale: 1.998 arcsec/pixel
Orientation: 88.229 degrees
Field radius: 1.747 degrees
Resolution: 5238x3492
Data source: Traveller
The Rosette Nebula, Caldwell 49, is a large spherical 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 stars of the cluster having been formed from the nebula's matter.
The cluster and nebula are 5,000 light-years from Earth 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.
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