SH2-140 (Paul Porto)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: 25 Cep · HD211029 · HD211123 · HD211242 · HD211781 · HD211880 · HD212365 · HD212413 · HD212495 · HD212730 · HD212882 · LBN 500 · LBN 505 · LBN 508 · LDN 1186 · LDN 1191 · LDN 1193 · LDN 1201 · Sh2-140 · Sh2-145 · The star 25 Cep · VdB153

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SH2-140

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SH2-140

Sh2-140, also known as the "Seagull Nebula," is a star-forming region located in the constellation Canis Major. Here are some interesting facts about Sh2-140:

Sh2-140 is also known as Sharpless 140, named after American astronomer Stewart Sharpless who cataloged it in 1959.
Located about 3,800 light-years from Earth.
A huge cloud of gas and dust, stretching across more than 100 light-years.
Illuminated by the light of several hot, young stars that are forming within it.
Discovered by the British astronomer Sir William Herschel in 1784.
The Seagull Nebula gets its name from its shape, which resembles a seagull in flight when viewed from Earth.
Contains a number of interesting objects, including a dense molecular cloud, a dark nebula, and several bright, young stars.
Part of a larger star-forming complex known as the Canis Major OB1 association.
Thought to be relatively young, with estimates suggesting that it is between 1 and 5 million years old.

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Description: Re-processes in PI with color mask and more curve work

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Distribution of astrophotographers

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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
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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	7684075
PixInsight job	3UGXNGULOGKJFU747WA30EYGRIQ816BL
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h18m39s.52
RA (top/left)	22h26m11s.25
RA (top/right)	22h25m41s.94
RA (bottom/right)	22h10m30s.37
RA (bottom/left)	22h12m10s.61

Dec (center)	+63°16′03″.8
Dec (top/left)	+62°06′09″.4
Dec (top/right)	+64°29′18″.2
Dec (bottom/right)	+64°24′12″.2
Dec (bottom/left)	+62°01′30″.7

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SH2-140

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