Amateur Astrophotographie Landos France

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Eastern Veil Nebula SHO


Optics/mount : 12″ACF 2.7m AP-Reduzer Alt-5
Camera/filters: Atik 11002 AstrodonHa/OIII/SII
Exposure:15×600 Ha, 10×600 OIII/SII all2bin
04 September 2014

The Veil Nebula itself is a large supernova remnant, the expanding debris cloud from the death explosion of a massive star. While the Veil is roughly circular in shape covering nearly 3 degrees on the sky in the constellation Cygnus, this portion of the eastern Veil spans only 1/2 degree, about the apparent size of the Moon. That translates to 12 light-years at the Veil’s reassuring estimated distance of 1,400 light-years from planet Earth. In the composite of image data recorded through narrow band filters, emission from hydrogen atoms in the remnant is shown in red with strong emission from oxygen atoms in blue-green hues.

NGC 6995 est la partie la plus méridionale de la nébuleuse Cirrus dans la constellation du Cygne. NGC 6995 a une luminosité de 7,00 mag et un diamètre de 12 minutes d’arc.

Pickering’s Triangle SHO



Optics/mount : 12″ACF 2.7m AP-Reduzer Alt-5
Camera/filters: Atik 11002 AstrodonHa/OIII/SII
Exposure:12×600 Ha, 7×600 OIII/SII all2bin
03 September 2014

The Veil Nebula is a cloud of heated and ionized gas and dust in the constellation Cygnus. It constitutes the visible portions of the Cygnus Loop (radio source W78, or Sharpless 103), a large but relatively faint supernova remnant. The source supernova exploded some 5,000 to 8,000 years ago, and the remnants have since expanded to cover an area roughly 3 degrees in diameter (about 6 times the diameter, or 36 times the area, of the full moon). The distance to the nebula is not precisely known, but Far Ultraviolet Spectroscopic Explorer (FUSE) data supports a distance of about 1,470 light-years.

In modern usage, the names Veil Nebula, Cirrus Nebula, and Filamentary Nebula generally refer to all the visible structure of the remnant, or even to the entire loop itself. The structure is so large that several NGC numbers were assigned to various arcs of the nebula.[4] There are three main visual components:

The Western Veil (also known as Caldwell 34), consisting of NGC 6960 (the “Witch’s Broom”, “Finger of God”, or “Filamentary Nebula”) near the foreground star 52 Cygni;
The Eastern Veil (also known as Caldwell 33), whose brightest area is NGC 6992, trailing off farther south into NGC 6995 and IC 1340; and
Pickering’s Triangle (or Pickering’s Triangular Wisp), brightest at the north central edge of the loop, but visible in photographs continuing toward the central area of the loop.@wikipedia

Le Triangle de Pickering se trouve quant à lui au nord-ouest de la nébuleuse. Comme son nom l’indique en partie, il s’agit d’un triangle filamenteux allongé en direction du sud sur environ 45 minutes d’arc (pour une base de 25′ de largeur). Il partage avec la Petite Dentelle la désignation de NGC 6960. Le Triangle de Pickering se prolonge par un long filament de plus de deux degrés de long.

The Wall NGC7000 in SHO

The Wall

Optics/mount : 12″ACF 2.7m AP-Reduzer Alt-5
Camera/filters: Atik 11002 AstrodonHa/OIII/SII
Exposure:125×600 Ha, 10×600 OIII/SII all2bin
02 September 2014

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.
Cygnus’s Wall is a term for the “Mexico and Central America part” of the North America Nebula. The Cygnus Wall exhibits the most concentrated star formations in the nebula. @wikipedia

La nébuleuse de l’Amérique du Nord (ou NGC 7000 ou nebula North America) est une nébuleuse en émission située à environ 580 pc (1 890 a.l.) dans la constellation du Cygne, près de Alpha Cygni1. Elle a une taille environ 15 pc (48,9 a.l.)
La forme de la nébuleuse fait penser à celle de l’Amérique du Nord, d’où son nom.

Pelican Nebula SHO


Optics/mount : 12″ACF 2.7m AP-Reduzer Alt-5
Camera/filters: Atik 11002 AstrodonHa/OIII/SII
Exposure:12×600 Ha, 7×600 OIII/SII all2bin
28 August 2014

The Pelican Nebula (also known as IC 5070 and IC 5067) is an H II region associated with the North America Nebula in the constellation Cygnus. The gaseous contortions of this emission nebula bear a resemblance to a pelican, giving rise to its name. The Pelican Nebula is located nearby first magnitude star Deneb, and is divided from its more prominent neighbour, the North America Nebula, by a molecular cloud filled with dark dust.

The Pelican is much studied because it has a particularly active mix of star formation and evolving gas clouds. The light from young energetic stars is slowly transforming cold gas to hot and causing an ionization front gradually to advance outward. Particularly dense filaments of cold gas are seen to still remain, and among these are found two jets emitted from the Herbig–Haro object 555. Millions of years from now this nebula might no longer be known as the Pelican, as the balance and placement of stars and gas will leave something that appears completely different. @wikipedia

IC 5067/70 est une très grande nébuleuse en émission (2,5 fois le diamètre de la pleine Lune). Elle se nomme aussi la ‘nébuleuse du Pélican.
Elle se trouve juste à côté de la très grande et célèbre NGC 7000 (la nébuleuse de l’Amérique du Nord). Elle doit être observée aux jumelles. Attention, sa puissante voisine atténue un peu la beauté de cette nébuleuse.