NGC 6992 et al. (Cygnus)

Fig. 1 - Interwoven strands of nebulosity: NGC 6992, NGC 6995 & IC 1340 in Cygnus, photographed with a 16-inch f/4.5 Dob on an equatorial platform. The reddish glow is mainly due to hydrogen, the blue-green emission due to the rarer doubly-ionized oxygen.

Object name:	Constellation:	Coordinates:	Apparent size:	Visual brightness:
NGC 6992	Cygnus	20h56m / +31°45'	60' x 8'	-

Object name:	Constellation:	Coordinates:	Apparent size:	Visual brightness:
NGC 6995	Cygnus	20h57m / +31°14'	12' x 12'	-

The supernova remnant NGC 6992, NGC 6995 & IC 1340 (Eastern Veil, Network Nebula, Lacework Nebula, Caldwell 33) in the constellation Cygnus. The Eastern Veil is a cloud of heated and ionized gas and dust from a star 20 times more massive than the Sun which exploded about 8,000 years ago. It is roughly 2,100 to 2,400 light-years from Earth. NGC 6992 was discovered by German-born British astronomer and composer William Herschel in 1783 /1784, NGC 6995 was discovered by his son John Frederick William Herschel in 1825 and IC 1340 by American astronomer Truman Henry Safford in 1866 (source: Wikipedia).

Exposure time: 1h 12min (24x3min) at gain 100 taken on July 11 / 12, 2021, were added for this shot with the Astro Pixel Processor (APP) software and the final image processing was done in Photoshop. Darks, flats and darkflats were used.

Equipment: Cooled ASI 2600MC Pro camera, TeleVue Paracorr Type II coma corrector, 16" f/4.5 "Ninja" dobsonian telescope riding on a dual-axis Tom Osypowski equatorial platform, Lacerta MGEN autoguider, Lacerta off axis system.

Field of view comparison: image of the moon with the same equipment.

Fig. 2 - Labeled image.

NGC6522 NGC6528 NGC7048