ic5070

Commentaires sur l’objet photographié

Voici une nouvelle image de l’observatoire Castor-Sirene que je partage avec mon ami Didier Plassard.
Voici la nébuleuse du Pélican dans le Cygne avec le 300 Rcos de 2850mm de focale.

Image SHO

Données techniques

Données techniques de prise de vue

Object :IC5070
Common name : Nébuleuse du Pélican
dates : du 31/07/14 au 21/08
Optics :Rcos 12″
Mount : Paramount ME Numéro 3
Location : Castor Sirene observatory
Seeing : FWHM min 1.72″ par pixel (ccdinspector)
Ccd : Apogee 16803
filter wheel :Apogee
filters : Astrodon HaSIIOIII
Focuser :TIM Rcos
Guiding : MMOAG Astrodon et Atik 314L+
Temp. out : 10 °à 20°
Temp ccd : -20°
Total exposure :41h40mn
Ha 58 x 20mn
o3 33 x 20mn
s2 34 x 20mn

Données scientifiques

The Pelican Nebula (also known as IC 5070 and IC 5067^[1]) 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.^[1] 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.^[1] 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.

Observation data: J2000.0 epoch
Right ascension	20^h 50^m 48.0^s
Declination	+44° 20′ 60.0″
Distance	1,800 ly
Apparent magnitude (V)	8.0
Apparent dimensions (V)	60‘ x 50‘
Constellation	Cygnus

Designations	IC 5070 and IC 5067, Sharpless 117