Western Veil nebula
The western Veil nebula in the constellation of Cygnus (NGC 6960)
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DESCRIPTION |
The western
Veil nebula (NGC 6960) is part of the Cygnus Loop, radio
source W78, or Sharpless 103. Other parts of the loop include the 'Eastern
Veil', the 'Western Veil' or 'Witch's Broom Nebula', and Pickering's
Triangular Wisp. It is a large, relatively faint supernova remnant
in the constellation Cygnus.
The source supernova
exploded some 5,000 to 8,000 years ago, and the remnants have since expanded
to cover an area of ~3x3 degrees; about 6 times the diameter or 36 times the
area of a full moon. The distance to the nebula is not precisely known, with
estimates ranging from 1,400 to 2,600 light-years. It was
discovered on 1784 September 5 by William Herschel. Wikipedia informations |
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ACQUISITION |
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Date
& Location |
12, 13, 26 Juillet 2009 – Lozère, France |
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Telescope/Optics |
Takahashi FSQ 106ED |
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Mount |
Takahashi EM200 |
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Camera
CCD |
SBIG STL 4020M |
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Focuser |
Robofocus/FocuxMax |
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Filters |
Ha/SII/OIII Astrodon filters |
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Guidage |
Off-axis MMOAG (Astrodon) STL remote guider TC-237H |
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IMAGING PROCESS |
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Exposures |
Ha(41*5min) SII(36*5min) OIII(37*5min) Total : 9h30 Out temperature : 10°C In CCD temperature : -25° |
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Softwares
for acquisition |
Robofocus, Focusmax, CCDsoft V5, TheShy6 Pro, CCDAP 4, CCDInspector |
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Softwares
for digital image processing |
Calibration, Registration, Color stack with CCDstack 1.0 (CCDIS
plug-in) Full processing with PIXINSIGHT Core version 1.5 |