Gamma Cygni Nebula.

Note
First image taken with only Ha data. Image is of the star Sadr in the right below corner, and the Nebula itself that can be seen is part of the Gamma Cygni Nebula. The nebula is also called The Butterfly Nebula.

About
Gamma Cygni (γ Cyg, γ Cygni) is a star in the constellation Cygnus. It has the traditional name Sadr (also spelled Sadir or Sador).
The traditional name comes from the Arabic word صدر şadr, "chest", the same word which gave rise to the star Schedar (Alpha Cassiopeiae).

In the catalogue of stars in the Calendarium of Al Achsasi al Mouakket, this star was designated Sadr al Dedjadjet, which was translated into Latin as Pectus Gallinǣ, meaning the hen's chest.

In Chinese, 天津 (Tiān Jīn), meaning Celestial Ford, refers to an asterism consisting of γ Cygni, δ Cygni, 30 Cygni, α Cygni, ν Cygni, τ Cygni, υ Cygni, ζ Cygni and ε Cygni. Consequently, γ Cygni itself is known as 天津一 (Tiān Jīn yī, English: the First Star of Celestial Ford.).

This star is surrounded by a diffuse nebula called IC1318, or the Gamma Cygni region.













Processing
CCD Stack and CS5

Exposure
Ha: 3 x 1200 sec.

Calibration
Darks, bias and flats.

Filters
Baader Ha 7nm.

Cooling temp
-20´ C

Mean FWHM
2,47"

Date
March 31st 2011

Location
Krigslida, Stockholm, Sweden.
N59 06 52.4    E 18 03 54.5

Image aqusition
MaximDL Pro

Scope control
Sky X Pro Native drv, and Maxim DL with Astro-Physics V2 drv.

Telescope
TEC APO 140

Mount
Astro-Physics Mach 1 GTO

Camera
QSI 583 WSG

Guiding
OAG guiding with Lodestar Guider

Focus system
Starlight Micro Touch and Focus MAX.


Inverted B/W image


Color syntezised.