Rosette Nebula - Hydrogen alpha
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 stars of the cluster having been formed from the nebula's matter.
The cluster and nebula lie at a distance of some 5,200 light-years from Earth (although estimates of the distance vary considerably, down to 4,900 light-years.) and measure roughly 130 light years in diameter. The radiation from the young stars excite 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.
It is believed that stellar winds from a group of O and B stars are exerting pressure on interstellar clouds to cause compression, followed by star formation in the nebula. This star formation is currently still on-going.
This is the initial work on a full colour (HSO) image but deserves a page to itself with a high resolution link. Data was gathered in February 2016 - but it was a while in the making because of many cloudy nights.
Imaging telescopes or lenses: Takahashi FSQ106ED
Imaging cameras: QSI 6120i
Mounts: Takahashi EM 400 Temma 2
Guiding telescopes or lenses: Takahashi FS 60 CB
Guiding cameras: QHY CCD QHY 5 II
Focal reducers: Takahashi QE 0.73x
Software: PHD 2, Pleiades Astrophoto PixInsight , Sequence Generator Pro SGP
Filters: Astrodon Ha 3nm
Accessories: Robofocus Focuser, ATIK EFW2
Resolution: 3896 x 2838
Dates: 11th Feb '16 - 25th Feb '16
Frames:
Astrodon Ha 3nm: 20x1200" bin 1x1
Integration: 6 Hours 40 Minutes.
Pixel scale: 1.6 arcsec/pixel
The cluster and nebula lie at a distance of some 5,200 light-years from Earth (although estimates of the distance vary considerably, down to 4,900 light-years.) and measure roughly 130 light years in diameter. The radiation from the young stars excite 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.
It is believed that stellar winds from a group of O and B stars are exerting pressure on interstellar clouds to cause compression, followed by star formation in the nebula. This star formation is currently still on-going.
This is the initial work on a full colour (HSO) image but deserves a page to itself with a high resolution link. Data was gathered in February 2016 - but it was a while in the making because of many cloudy nights.
Imaging telescopes or lenses: Takahashi FSQ106ED
Imaging cameras: QSI 6120i
Mounts: Takahashi EM 400 Temma 2
Guiding telescopes or lenses: Takahashi FS 60 CB
Guiding cameras: QHY CCD QHY 5 II
Focal reducers: Takahashi QE 0.73x
Software: PHD 2, Pleiades Astrophoto PixInsight , Sequence Generator Pro SGP
Filters: Astrodon Ha 3nm
Accessories: Robofocus Focuser, ATIK EFW2
Resolution: 3896 x 2838
Dates: 11th Feb '16 - 25th Feb '16
Frames:
Astrodon Ha 3nm: 20x1200" bin 1x1
Integration: 6 Hours 40 Minutes.
Pixel scale: 1.6 arcsec/pixel
