Cygnus X-1 - Black Hole (Tom Wildoner)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: B144 · HD226803 · HD226867 · HD226868 · HD226918 · HD226919 · HD226938

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Cygnus X-1 - Black Hole

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Cygnus X-1 - Black Hole

While imaging and processing the The Tulip nebula, I was surprised to see I also captured the shock wave being produced from Cygnus X-1. It is the site of one of the first suspected black holes. Over the years the location of this X-ray source became more accurately determined. The X-ray source was found to lie very close to the position of a 9th magnitude star called HDE 226868. This star is a large blue supergiant, and its companion – the more compact of the two objects in the system – is thought to be between 20 and 35 solar masses. Since the largest possible mass of a neutron star can not exceed three solar masses, the compact object which is unseen, is almost certainly a black hole. These two objects share an orbital periodicity of 5.6 days.

Tech Specs: Sky-Watcher Esprit 120ED Telescope, ZWO AS2600mc-Pro running at 0C, Sky-Watcher EQ6R-Pro mount, Optolong L-eXtreme filter (2”), 42 x 300 second exposures, guided using a ZWO 30mm f/4 mini guide scope and ZWO 120 Mini, focus with a ZWO EAF, controlled with a ZWO ASIAir Pro. Processed using PixInsight and DSS. Image Date: September 1, 2022. Location: The Dark Side Observatory, Weatherly, PA, USA (Bortle Class 4).

Northeast Imagers
The refractors!

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Advanced success
Started	...
Astrometry.net job	6591761
PixInsight job	A5YYKYM63B7Q3LTC1GSKGZWZIWZORRV9
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	19h58m14s.956
RA (top/left)	19h59m15s.910
RA (top/right)	19h58m48s.529
RA (bottom/right)	19h57m14s.744
RA (bottom/left)	19h57m42s.900

Dec (center)	+35°16′10″.42
Dec (top/left)	+35°06′14″.77
Dec (top/right)	+35°30′24″.98
Dec (bottom/right)	+35°26′06″.39
Dec (bottom/left)	+35°01′51″.60

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Cygnus X-1 - Black Hole

Cygnus X-1 - Black Hole

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Cygnus X-1 - Black Hole

Cygnus X-1 - Black Hole

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