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The Cygnus Wall in the North America Nebula

The Cygnus Wall in the North America Nebula

Ha+OIII Bi-Color Narrowband image of the Cygnus Wall. The North America Nebula (NGC 7000 or Caldwell 20) is an emission nebula in the constellation Cygnus, close to the star Deneb. The remarkable shape of the nebula resembles that of the continent of North America, complete with a prominent Gulf of Mexico.

The Cygnus Wall:
The Cygnus Wall is a term for the "Mexico and Central America part" of the North America Nebula. The Cygnus Wall has the most concentrated star formation in the nebula. The North America Nebula and the nearby Pelican Nebula, (IC 5070) are in fact parts of the same interstellar cloud of ionized hydrogen (H II region). The nebula complex is estimated to be about 1,800 light-years from Earth.

Gear:
GSO 6" f/4 Imaging Newtonian Reflector Telescope.
Baader Mark-III MPCC Coma Corrector.
Celestron SkySync GPS Accessory.
Orion Mini 50mm Guide Scope.
Orion StarShoot Autoguider.
TeleVue 2x 2" PowerMate.
Celestron AVX Mount.
QHYCCD PoleMaster.
Celestron StarSense.
Canon 60Da DSLR.

Tech:
Guiding in Open PHD 2.6.3.
Image acquisition in Sequence Generator Pro.

Lights/Subs:
Imaged in the following Wavelengths of Light:
20 x 480 sec. ISO 3200 7nm Hydrogen-Alpha (CWL 656,3 nm).
20 x 600 sec. ISO 3200 8.5nm Oxygen III (CWL 502 nm).
PixelMath Synth Green Ha+OIII Channel mix.

Calibration Frames:
50 x Bias/Offset.
30 x Darks.
20 x Flats and Dark Flats.
Linear workflow in PixInsight.
Finished in Photoshop.

Flickr Explore:
explore-2017-07-01

Martin
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Photo prise le 24 juin 2017 (© Martin_Heigan / Flickr)

Voir aussi :
 north america nebula, ngc 7000, caldwell 20, hydrogen, astronomy, astrophysics, astrograph, telescope, newtonian, martin, heigan, astrophotography, reflector, celestron, avx, nebula, deep sky, dso, space, science
 

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