IC 4628 (Jochen Maes)

IC 4628

Link: https://www.jochenmaes.com/astronomy/nebulae?itemId=39wqx2477kzuwdnnqh7bg1onl7s2cf

IC 4628

Link: https://www.jochenmaes.com/astronomy/nebulae?itemId=39wqx2477kzuwdnnqh7bg1onl7s2cf

IC 4628 is an emission nebula in the Scorpius constellation, around 6000 light years from earth.

While being relatively faint, the entire structure seen here is roughly equal to the size of a full moon in the nightsky. An interesting presence in this region are two so-called O-type stars. So what makes these so interesting?

First of all, O-type stars are very rare (only 0.00000005% of all stars are O-types). They are the brightest and hottest burning stars we currently know to exist (if we exclude neutron stars and white dwarfs, which strictly speaking aren't stars anymore), with surface temperatures reaching a toasty 30000 degrees Celsius (54000 Fahrenheit). All of this violent energy expenditure of course means that they'll run through their nuclear fuel reserves quite quickly and have lifespans of "only" a few million years. At first sight, this may seem quite long. But if we compare it to a fairly quiet star like the Sun, which will last roughly 10 billion years; O-type stars very much embrace a "live fast, die young" lifestyle.

Image acquisition details:

24x1200" SII
24x1200" HA
24x1200" OIII
6x600" Red
6x600" Green
6x600" Blue

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

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	Basic failed
Started	...
Astrometry.net job	5926088
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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IC 4628

IC 4628

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Image Index:

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IC 4628

IC 4628

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