North America Nebula

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The North America Nebula (NGC 7000 or Caldwell 20) is an emission nebula in the constellation Cygnus, close to Deneb (the tail of the swan and its brightest star). The remarkable shape of the nebula resembles that of the continent of North America, complete with a prominent Gulf of Mexico. It is sometimes incorrectly called the “North American Nebula”.

The nebula was discovered by William Herschel on October 24, 1786, from Slough, England.

The North America Nebula is large, covering an area of more than four times the size of the full moon; but its surface brightness is low, so normally it cannot be seen with the unaided eye. Binoculars and telescopes with large fields of view (approximately 3°) will show it as a foggy patch of light under sufficiently dark skies. However, using a UHC filter, which filters out some unwanted wavelengths of light, it can be seen without magnification under dark skies. Its prominent shape and especially its reddish color (from the hydrogen Hα emission line) show up only in photographs of the area.

Imaging telescopes or lenses: Sky-Watcher Equinox 80ED
Imaging cameras: Canon T2i Baader
Mounts: Skywatcher EQ 6 Pro
Guiding telescopes or lenses: Orion ShortTube 80 Guide Scope
Guiding cameras: Imaging Source DMK21AU618 (mono)
Software: PHD Guiding, Adobe Photoshop CS6
Filters: Astronomik CLS CCD EOS Clip Filter
Resolution: 1037×691
Dates: Oct. 12, 2014
Locations: Matane, Québec
Frames: Astronomik CLS CCD EOS Clip Filter: 1×180″ ISO1600
Integration: 0.1 hours
Avg. Moon age: 18.55 days
Avg. Moon phase: 84.67%
RA center: 314.517 degrees
DEC center: 44.161 degrees
Pixel scale: 11.220 arcsec/pixel
Orientation: -95.520 degrees
Field radius: 1.942 degrees

Аuthor: Daniel Fournier

AstroPhotography of the day of SPONLI , 14.10.2014