Western veil nebula (Constellation Cygnus)

The western Veil nebula in the constellation of Cygnus (NGC 6960)

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.

Credit : APOD and Wikipedia informations

ACQUISITION

 

Date & Location

12, 13, 26 Juillet 2009 – Lozère, France

Telescope/Optics

Takahashi FSQ 106ED

Mount

Takahashi EM200

Camera CCD

SBIG STL 4020M

Focuser

Robofocus/FocuxMax

Filters

Ha/SII/OIII Astrodon filters

Guidage

Off-axis MMOAG (Astrodon) STL remote guider TC-237H

IMAGING PROCESS

 

Exposures

Ha(41*5min) SII(36*5min) OIII(37*5min)

Total : 9h30

Out temperature : 10°C

In CCD temperature : -25°

Softwares for acquisition

Robofocus, Focusmax, CCDsoft V5, TheShy6 Pro, CCDAP 4, CCDInspector

Softwares for digital image processing

Calibration, Registration, Color stack with CCDstack 1.0 (CCDIS plug-in)

Full processing with PIXINSIGHT Core version 1.5


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