ngc 7538 (astroeyes)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: NGC 7538

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ngc 7538

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ngc 7538

Not far from the more famous Bubble Nebula, NGC 7538 is an emission and reflection nebula found in Cepheus. It contains the largest known protostar and lies 2.8 kiloparsecs distant.

The age of it's newly formed stars is around 1-4 million years but because of the dusty region the nebula lies in it is usually studied in infra-red, or longer, wavelengths not available to amateurs.

One newly formed protostar, NGC 7538S is collapsing to a core of around 100 solar masses. It has a rotating accretion disc and should eventually form a high mass B class star.

The massive star forming region known as MM1 contains around 30 solar masses and will probably form an O class star.

It has been discovered that other star forming regions within NGC 7538 are not forming by self-induced collapse, because neither the pressure or temperature within these regions is high enough. Possibly their formation has been initiated by shock waves or magnetic fields.

There is a lot of professional research going on around NGC 7538, it is a shame it is so often ignored by amateurs.

My image, taken Sept '14, shows the major features of the nebula only.

Original
Final
B

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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
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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
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	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
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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	Basic success
Started	...
Astrometry.net job	374076
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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