The Tulip Nebula (Jeff Reitzel)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: B144 · LBN 168 · LBN 171 · LDN 847 · Sh2-101

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The Tulip Nebula

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The Tulip Nebula

This years version of Sharpless 2-101 The Tulip Nebula. This is such an active region in Cygnus. The Tulip itself is the result of strong emissions from hot O-type stars erupting through the surrounding gas and dust. Just to the right of the Tulip there are two near perfect semi-circles. One is dark and the other blue. In this area is the first stellar mass black hole ever discovered. Powered by jets from the black hole's accretion disc is Cygnus X-1, a microquasar that is one of the strongest X-ray sources observed from Earth. These jets create the blue shockwave seen in the image while the darker semi-circle is material being drawn towards that immense gravity well. I come back to this region from time to time as it is one of my favorites and likely one of the most active regions we can observe. I find it a difficult target to get great detail looking through the dense star field of our northern Milky Way.

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Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
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.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	8460535
PixInsight job	RZU5SYS1TBUP85B5GJ4M59KWJ5EGYI48
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	19h59m30s.20
RA (top/left)	20h02m28s.18
RA (top/right)	19h56m29s.48
RA (bottom/right)	19h56m34s.52
RA (bottom/left)	20h02m28s.69

Dec (center)	+35°24′37″.3
Dec (top/left)	+35°54′44″.3
Dec (top/right)	+35°54′02″.2
Dec (bottom/right)	+34°54′14″.8
Dec (bottom/left)	+34°54′56″.2

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The Tulip Nebula

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