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The Cirrus Nebula or Veil Nebula is a cloud of heated and ionized gas and dust in the constellation Cygnus. It constitutes the visible portions of the Cygnus Loop (radio source W78, or Sharpless 103), a large but relatively faint supernova remnant. The source supernova exploded circa 3,000 BC to 6,000 BC, and the remnants have since expanded to cover an area roughly 3 degrees in diameter (about 6 times the diameter, or 36 times the area, of the full moon). The distance to the nebula is not precisely known, but Far Ultraviolet Spectroscopic Explorer (FUSE) data supports a distance of about 1,470 light-years

Components
In modern usage, the names Veil Nebula, Cirrus Nebula, and Filamentary Nebula generally refer to all the visible structure of the remnant, or even to the entire loop itself. The structure is so large that several NGC numbers were assigned to various arcs of the nebula. There are three main visual components: The Western Veil (also known as Caldwell 34), consisting of NGC 6960 (the "Witch's Broom", "Finger of God", or "Filamentary Nebula") near the foreground star 52 Cygni; The Eastern Veil (also known as Caldwell 33), whose brightest area is NGC 6992, trailing off farther south into NGC 6995 (together with NGC 6992 also known as "Network Nebula") and IC 1340; and Pickering's Triangle (or Pickering's Triangular Wisp), brightest at the north central edge of the loop, but visible in photographs continuing toward the central area of the loop. NGC 6974 and NGC 6979 are luminous knots in a fainter patch of nebulosity on the northern rim between NGC 6992 and Pickering's Triangle.

 
 
ObjectNGC 6960, NGC 6992, NGC 6995, NGC 6974, and NGC 6979, IC 1340
Constellation: Cygnus
Position: RA 20h 45m 38.0s DEC +30° 42′ 30″
Apparent Size: 3 deg
Apparent Magnitude: +7.0
Distance (average) 1470 ly
  
Photo Datas 
Date 26.08.2016, 21:00 UTC
Location Knottenried/Oberallgäu, 1002m ASL
GPS: 47°36’13“ N, 10°11’24“ E
Sky darkness SQM-L Zenit 20.7mag/sqrsec, Object 20.4mag/sqrsec
Ground Temp./Air Pressure 13.5°C /1025mbar
Thermal sky temp./weather  -42°C Zenit
Seeing  
Telescope Canon f/2.8 300mm L IS USM I
Camera Sony A7Ra mod @ T sensor=16.7°C
Expose frames ISO 3200, RAW 7x30s, 4 darks
Total expose
3 min 30s
Filter no
Mount FS2
Guiding Cam no
Software DSS 3.3.4, Photoshop CC
Remarks (quick shot).

 C 2016 Peter Cerveny