Sh2-101: Sharpless 101 and Cygnus X-1 (Michael Stecker)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg)

Sh2-101: Sharpless 101 and Cygnus X-1, Michael Stecker

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Sh2-101: Sharpless 101 and Cygnus X-1

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Sh2-101: Sharpless 101 and Cygnus X-1

Sh2-101: Sharpless 101 and Cygnus X-1
file: Sh101-180sX42AP130f4d7P2-7202023-cr2.jpg

This red emission nebula Sharpless-101 lies in the constellation Cygnus. Next to the brightest of two stars at the lower left is a strong x-ray source called Cygnus X-1. The mass of the unseen companion is significantly larger than 5 solar masses suggesting it is a black hole -- the first one mentioned by astronomers. I used an Astro-Physics 130 mm f/6 triplet refractor focally reduced to f/4.7 with exposures of 180 seconds X 42 (126-minutes) and an Optolong L-eNhanced nebular filter.
.
The Cygnus X-1 story:
https://www.astronomy.com/science/cygnus-x-1-the-black-hole-that-started-it-all/
Photographic Data
telescope:
Astro-Physics 130 mm (5.1-inch) f/6 triplet refractor focally reduced to f/4.7 (FL= 616 mm)

mount:
ZWO AM5 harmonic/strainwave
Mount Guide Settings in Asiair Plus:
Calibrate Step: 5,000 ms
Dec Duration: 3,000 ms
RA Duration: 2,000 ms
Aggression: 50% for both RA & Dec
Exposure time for guiding: 1 second
Guiding hardware:
SVBony 60 mm f/4 guidescope (fl=240 mm)
Guide Camera: ZWO ASI662MC color planetary camera (2.97 micron pixels)
controller/computer
ZWO Asiair Plus via WiFi to Samsung S7+ tablet
.
imaging camera:
ZWO ASI533MC-Pro one-shot color astro-camera cooled to 14-degrees F with Optolong L-eNhanced nebular filter
.
exposures:
180 seconds X 42 (148-minutes or 2.1 hours)

processing
Stacked in Asiair Plus and cropped and post-processed in Adobe Photoshop Elements
.
photographic site:
West Los Angeles
http://mstecker.com/pages/chhouses_fp.htm
(Bortle 9 light polluted sky)

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Sh2-101: Sharpless 101 and Cygnus X-1

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