Sh2-101 Tulip Nebula #1 (Molly Wakeling)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: 21 eta Cyg · B144 · Sh2-101 · The star ηCyg

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Sh2-101 Tulip Nebula #1

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Sh2-101 Tulip Nebula #1

The Tulip Nebula!
Also listed in the Sharpless catalog as Sh2-101, this emission nebula lies about 6,000 lightyears away in the constellation of Cygnus, the Swan. Cygnus is high above our heads in the Northern Hemisphere in the summertime, and is easily found by locating its two brightest stars, Deneb and Sadr, which form the body of the Swan.

Just to the right of the Tulip itself are two bright stars, the lower of which is a binary companion to one of the first suspected black holes. It was discovered from a rocket-launched X-ray detector in 1964 and is named Cygnus X-1. It's one of the brightest X-ray sources yet seen. The black hole is about 21.2 solar masses and has an event horizon of about 300 km (186 miles). It pulls material off the stellar wind of the companion star, forming an accretion disk that gets superheated to millions of degrees, which is the source of the X-rays.

Narrowband imaging saves the day under light-polluted skies! This was captured from my backyard in Dayton, OH, which is about Bortle 7 on the light pollution scale. Not only was I able to get a nice bright Tulip, but I picked up a lot of the fluffy hydrogen gas clouds in the background that suffuse the Cygnus region. This particular filter, the Optolong L-eXtreme, captures a small sliver of the color spectrum around hydrogen-alpha and oxygen-III emission (red and blue in color, respectively).

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	Distinct awarded users	Total awarded images
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	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
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	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
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Mix of multiple sources
Other
Unknown

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.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
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Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
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Status	Advanced success
Started	...
Astrometry.net job	4887817
PixInsight job	5RWTC3MDVXDRKA9EPZ3E8VAQXI8TPENQ
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	20h00m04s.33
RA (top/left)	20h05m08s.79
RA (top/right)	19h55m07s.33
RA (bottom/right)	19h55m04s.55
RA (bottom/left)	20h04m55s.82

Dec (center)	+35°17′10″.4
Dec (top/left)	+35°56′36″.6
Dec (top/right)	+35°59′01″.2
Dec (bottom/right)	+34°36′58″.0
Dec (bottom/left)	+34°34′36″.1

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Sh2-101 Tulip Nebula #1

Sh2-101 Tulip Nebula #1

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Sh2-101 Tulip Nebula #1

Sh2-101 Tulip Nebula #1

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