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Cygnus Core Mosaic (61hrs)

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#1 vakulenko_sergiy

vakulenko_sergiy

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Posted 02 March 2021 - 09:53 AM

This mosaic was created spontaneously. I wanted to shoot the area around NGC6888, WR134 and SH2-101 in order to make 3 different pictures in bicolor scheme. However at the end I don't have enough O3 frames to do this. As a result, during processing, I noticed that all three images have enough common FOV to make a three-panel mosaic. The mosaic below spans the region between the stars γ and η Cygnus, at the very heart of this summer constellation. The narrow-band image shows well-known nebulae such as NGC6888 (Crescent), SH2-101 (Tulip) and SH2-104, and many other faint stuff at the background.

 

Image on Astrobin (Cygnus core mosaic)

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Starless image on Astrobin (Cygnus core mosaic)

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The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000 to 400,000 years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures.

The Tulip Nebula (Sharpless 101) is an emission nebula located in Cygnus constellation. It lies at an approximate distance of 6,000 light years from Earth and has a linear diameter of about 70 light years. The HII region is called the Tulip Nebula because its shape resembles the form of a tulip.

The emission from the Tulip Nebula is powered by ultraviolet radiation of the hot young star HD 227018. The O6.5III class star belongs to the Cygnus OB3 association and has a visual magnitude of 9.02. In images, it can be seen near the nebula’s center.

Sh2-104, also cataloged as DWB 14, is about 14,000 light years away toward the Cygnus constellation. This is located due east of the popular Crescent Nebula. Sh-104 is viewed by professional astronomers as a good illustration of the "collect and collapse" model of star formation triggered by the rapid expansion of a HII.

 

Own remote observatory, 50 km from Kiev, Bortle 4 zone. Imaged during May - August 2020. AZ-EQ6 mount, Jupiter-37A lens (135mm at 1/3.5), QHY22. Guide - 50x9 finder with DIY Cam10 camera.
Astrodon 5nm Ha: 224 x 900s (total for mosaic)
Total exposure - 61 hr.
Captured in SGP, processed in Pixinsight.

Attached Thumbnails

  • MergeMosaic.jpg

  • John Miele, fetoma, jim kuhns and 16 others like this


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