NGC 7000 (or Caldwell 20), also called the North America Nebula, is an emission nebula located in the constellation Cygnus.

This nebula's shape evokes North America and the Gulf of Mexico. It is therefore usually nicknamed "America" or "North America Nebula".

This large nebula is located near Deneb (Alpha Cygni), the brightest star in Cygnus.
Also located in the same nebulous complex are the Pelican Nebula (IC 5070) and IC 5068.
On October 24th 1786, William Herschel was observing the sky from Slough (England).
He noted a faint milky nebula scattered throughout space, quite bright in some places.

The largest region of this nebula was included in the General Catalogue of Nebulae and Clusters by his son, John Herschel, on August 21st 1829, under the designation GC 4621.

John Dreyer included it in the New General Catalogue under the designation NGC 7000, describing it as a faint, diffuse nebulosity that is extremely large.

This nebula covers a region larger than ten times that of the full Moon, but its surface brightness is so faint that it is not visible to the naked eye.

Set up

Fra400 on EQ6 R Pro mount
ASI533 MC Pro for imaging
ASI120 mini for guiding via OAG Zwo (Off-Axis-Guider)
Antlia Duo Band 5 nm
Control via ASIAIR PLUS

The session

NGC7000 was taken last year on March 2024
10 frames, 600” each
Total integration : Only 1 hour 40’

I wanted to complete it by taking more puctures this year, but, I found out that it was enough data & details with 1h40’

Processing

Calibration, Alignment and Stacking via Siril
Processing via Pixinsight

**SPCC with PixInsight : Full of data even in only 1h40’ of imaging.**

Procedure via PixInsight :

Dynamic Crop
Gradient correction
Image Solver
SPCC
BlurX Terminator (Correct only)
NoiseX Terminator
EZ Suite Stretch
SCNR to remove the green noise
StarX Terminator to remove the stars
Narrowband Normalization on the starless image
Yellow mask & curve transformation
Blue mask & curve transformation
Curve on the starless image for saturation & RGB/K
Local histogram equalization on the starless image (2 times)
HDR Multiscale Transform to recover details (scale 8)
Dark structure enhance
Saturation on the stars image via curve transformation to pop up details (just a hair)
Pixel Math to bring the stars back
Noise reduction via NoiseX

Clear Sky !

NGC7000 - The North America Nebula

IC 410 - The Cosmic Tadpoles

IC 405 - The Flaming Star