The three emission gas nebulae NGC 6992, NGC 6995 and IC 1340 form the so-called “Eastern Veil” of the Cirrus (or Veil) Nebula,  a gaseous structure  resulting from a Supernova event about 8000 years ago in the constellation Cygnus. Located at about 3 degrees distance is  NGC 6960, the so-called “Western Veil”. The Cirrus Nebula was discovered by Wilhelm Herschel in 1784, has a diameter of 3 deg or 150 light-years located at a distance of 2400 light-years. The pictures below show the nebula in H-alpha (grey scale), an annotated image and a combined image using data from H-alpha and O[III] filters.

NGC 6992, 6995 and IC 1340 (Cirrus Nebula, Eastern Veil), 27 & 28 August 2023, Kempen, 

William Optics APO 110 mm, f/7, H-alpha filter, ASI1600mm pro, gain 139, T = -10C, 3600 sec. 

Image processing with PixInsight V1.8.9

NGC 6992, 6995 and IC 1340 (Cirrus Nebula, Eastern Veil), 27 & 28 August 2023, Kempen,  

William Optics APO 110 mm, f/7, H-alpha filter (yellow/brown, 3600 sec) and O[III] filter (blue, 3600 s). 

ASI1600mm pro, gain 139, T = -10C, . Image processing with PixInsight V1.8.9