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Contains:  B144, Sh2-101
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Tulip Nebula Sh2-101 and Cygnus X-1 bow shockwave

Technical card

Dates:July 7, 2019

Astrodon Ha 3nm: 69x1200" bin 1x1
Astrodon OIII 3nm: 64x1200" bin 1x1
Astrodon SII 3nm: 48x1200" bin 1x1

Integration: 60.3 hours

Avg. Moon age: 5.28 days

Avg. Moon phase: 28.32% job: 2801256

RA center: 19h 59' 0"

DEC center: +35° 25' 21"

Pixel scale: 0.743 arcsec/pixel

Orientation: 1.164 degrees

Field radius: 0.546 degrees

Resolution: 4237x3164

Locations: Entre Encinas y Estrellas E-EyE, Fregenal de la Sierra, Extremadura, Spain

Data source: Own remote observatory

Remote source: e-EyE Extremadura


Having been inspired by Gendler and Ivan Eder, Steve and I have set out to capture the OIII blue shockwave of Cygnus X-1 and the stunningly beautiful Tulip nebula in this two panel mosaic.

We began imaging on 14th May and extended the framing to include the second panel for the arc of the blackhole's shockwave. In addition we have also added data from Steve's image when he first acquired his TEC and taken from his home observatory, thus boosting the data in panel 1 (the Tulip itself).

From APOD's commentary to Ivan Eder's superb image: "Framing a bright emission region, this telescopic view looks out along the plane of our Milky Way Galaxy toward the nebula rich constellation Cygnus the Swan. Popularly called the Tulip Nebula, the reddish glowing cloud of interstellar gas and dust is also found in the 1959 catalog by astronomer Stewart Sharpless as Sh2-101. About 8,000 light-years distant and 70 light-years across the complex and beautiful nebula blossoms at the center of this composite image. Ultraviolet radiation from young energetic stars at the edge of the Cygnus OB3 association, including O star HDE 227018, ionizes the atoms and powers the emission from the Tulip Nebula. HDE 227018 is the bright star near the center of the nebula. Also framed in the field of view is microquasar Cygnus X-1, one of the strongest X-ray sources in planet Earth's sky. Driven by powerful jets from a black hole accretion disk, its fainter visible curved shock front lies above and right, just beyond the cosmic Tulip's petals."

Data acquisition: Barry Wilson & Steve Mine
Processing: Barry Wilson



Barry Wilson



Description: Slight contrast curves adjustment

Sky plot

Sky plot


Tulip Nebula Sh2-101 and Cygnus X-1 bow shockwave, 


            Barry Wilson