The Tulip Nebula (Sh2-101) and Cygnus X-1 Bow Shock (Luca Marinelli)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: B144 · Sh2-101

Powered byPixInsight

The Tulip Nebula (Sh2-101) and Cygnus X-1 Bow Shock

Powered byPixInsight

The Tulip Nebula (Sh2-101) and Cygnus X-1 Bow Shock

The Tulip Nebula (Sh2-101) is a HII emission nebula located in the constellation Cygnus at a distance of about 6,000 light years from Earth. It is in close proximity to microquasar Cygnus X-1, site of one of the first suspected black holes. Cygnus X-1 is the brighter of the two stars at the end of the lower petal of the Tulip.

Cygnus X-1 was discovered in 1964 during a rocket flight and is one of the strongest X-ray sources seen from Earth. It remains among the most studied astronomical objects in its class. The compact object is now estimated to have a mass about 14.8 times the mass of the Sun and has been shown to be too small to be any known kind of normal star, or other likely object besides a black hole.

Cygnus X-1 belongs to a high-mass X-ray binary system that includes a blue supergiant variable star designated HDE 226868[18] which it orbits at about 0.2 AU. A stellar wind from the star provides material for an accretion disk around the X-ray source. Matter in the inner disk is heated to millions of degrees, generating the observed X-rays. A pair of jets radiating from the accretion disk of the black hole are colliding with the interstellar material to form the curved shock front (in blue) at the right of the Tulip.

Sources:

https://en.wikipedia.org/wiki/Cygnus_X-1

https://en.wikipedia.org/wiki/Sh2-101

https://www.skyandtelescope.com/online-gallery/tulip-nebula-with-cygnus-x-1-bow-shock/

Original
B
Final
C

B

Description: Opened dark shadows lightly to optimize display on narrower-gamut monitors.

Uploaded: ...

C

Description: Added RGB star color.

Uploaded: ...

Northeast Imagers
Narrowband imaging
KODAK 8300 sensor
Cloudy Nights

Please note: The following tables are updated every 24 hours.

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
Artificial satellite

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	...
PixInsight job	3HPGNKM2RUZ6LJU8BXKY09ZNTSU0MZDG
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	19h58m53s.693
RA (top/left)	20h01m04s.910
RA (top/right)	19h56m44s.269
RA (bottom/right)	19h56m43s.604
RA (bottom/left)	20h01m01s.995

Dec (center)	+35°24′14″.99
Dec (top/left)	+35°43′10″.67
Dec (top/right)	+35°43′42″.72
Dec (bottom/right)	+35°05′11″.71
Dec (bottom/left)	+35°04′41″.16

AstroBin

AstroBin

Image Index:

Contribution Index (beta):

The Tulip Nebula (Sh2-101) and Cygnus X-1 Bow Shock

The Tulip Nebula (Sh2-101) and Cygnus X-1 Bow Shock

Equipment

Acquisition details

Description

Comments

Revisions

B

C

Sky plot

Histogram

In these public groups

		...
You have no new notifications.

AstroBin

AstroBin

Image Index:

Contribution Index (beta):

The Tulip Nebula (Sh2-101) and Cygnus X-1 Bow Shock

The Tulip Nebula (Sh2-101) and Cygnus X-1 Bow Shock

Equipment

Acquisition details

Description

Comments

Revisions

B

C

Sky plot

Histogram

In these public groups

Notifications

AstroBin is in READ ONLY mode

Sorry :-(

Sorry :-(

Sorry :-(

Are you really sure?

Warning!

Warning!

Are you sure?

Report abuse

Slideshow settings

IOTD/TP stats (last [x] days)

Distribution of astrophotographers

Distribution of subject types

Distribution of data sources

Sorry

Sorry

Share

Upload new revision

Upload uncompressed source (XISF/FITS/PSD/TIFF)

Delete image and all its revisions?

Delete original image?

Delete all other versions?

Delete all revisions?

Delete this revision?

Delete this revision?

IOTD/TP stats

The following people like this image

The following people bookmarked this image

Error

Flag malfunctioning thumbnails

Contains

Remove yourself as a collaborator

Plate-solving information