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Palomar
10 in Sagitta
Extremely
Obscured Globular
Uploaded
10/21/07
Lying behind
a dark nebula in the constellation of Sagitta, this highly obscured
globular cluster is seldom photographed. This 13.2 magnitude
object spans about 4 arc minutes of sky, and the brightest stars
are 18 - 19th magnitude. The globular appears very deep yellowish
- red due to the obscuring dust, which reddens starlight considerably.
The result is a dim but highly colored object in a field of bright
Milkyway stars.
You will also
notice that nearly all the stars in this field are yellowish
as well. In fact, most of the stars in the field are behind the
dust. Only a small handful of the brightest ones are in the foreground
and are more blue.
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Instrument: 12.5" f/5 Home made Newtonian
Mount: Astrophysics 1200 QMD
CCD Camera: SBIG 10XME NABG with Enhanced Water Cooling
Guider: Meade DSIpro w/Lumicon Newt Easy Guider
Exposure: RGB = 40:40:40
AstroDon RGB Combine Ratio: 1: 1.05: 1.11
Location: Payson, Arizona, Elevation: 5150 ft.
Sky: Seeing FWHM = 6 arcsec (Maxim DL - 10min subframe), Transparency 9/10
Outside Temperature: 45 F
CCD Temperature: -30 C
Image Processing Tools:
Maxim DL: Calibration, deblooming (Starizona Debloomer), aligning, stacking
Gralaks Sigma: Stacking
PixInsight: Curves, Deconvolution, noise reduction
Photoshop CS2: Curves, Color Correction, Gradient removal (Grad Xterminator), Cleanup
HOME GALAXIES EMISSION NEBS REFLECTION NEBS COMETS
GLOBULARS OPEN CLUST PLANETARIES LINKS
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