AstroBinAstroBin
Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  52 Cyg  ·  IC 1340  ·  NGC 6960  ·  NGC 6974  ·  NGC 6979  ·  NGC 6992  ·  NGC 6995  ·  Sh2-103  ·  The star 52Cyg  ·  Veil Nebula
Cygnus Loop, Dave Sifry
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Cygnus Loop

Cygnus Loop, Dave Sifry
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Cygnus Loop

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The latest image from the telescope in my foggy Bortle 9 backyard in San Francisco - This is an area called The Cygnus Loop (sometimes known as the Veil Nebula), a large supernova remnant in the constellation Cygnus, an emission nebula measuring nearly 3° across, and it is about 2400 light years away. The explosion occurred some 5,000 to 10,000 years ago. You can see the hot gases still expanding from the supernova - you can even make out some of the remnants at the center, although no one has been able to identify the remains of the exploded star, though the current thinking is that it may have been ejected violently and you can see the ejection path in the lower left gas jets. You can also see the supernova’s shock wave shell or “bubble” remnants in the left and right hand sides as the shock wave and ejected material interacts with other latent gas clouds as it expands. BTW, the areas on the sides are often studied by themselves, and the bright area on the right (east) is called the Eastern Veil, and the area on the left (west) is known as the Witch’s Broom. The colors come from the emissions of Oxygen, Sulfur, and Hydrogen gas interacting with the shockwave expanding at a velocity of about 1.5 million kilometers per hour, just to give you some thought about how BIG a supernova is - the width of an individual filament you see on the left or right is about the distance between Earth and Pluto.

The guided image was taken using Baader 3nm Fast CMOS filters with a Celestron 8SE, Hyperstar 4, on an Celestron AVX mount, using my ZWO ASIAIR PRO over 3 nights in late August, 2021.

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Cygnus Loop, Dave Sifry

In these public groups

Sharpless2 Objects
Light Polluted skies
HyperStar Lens Astrophotography
Hubble Palette Group
ASI 6200 MM Pro
/r/astrophotography
CMOS Imagers
Cloudy Nights
SF Bay Area Imagers
ZWO ASIAIR PRO USERS
Schmidt-Cassegrain Telescope (SCT) Imagers
Narrowband imaging
Nexstar8SE All-Stars
Nebula Photos Monthly Challenge
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