NGC404 Ghost of Mirach (milliesand)

NGC404 Ghost of Mirach

From Wiki

Beta Andromedae (Beta And, β And, β Andromedae) is the Bayer designation for a prominent

star in the northern constellation of Andromeda. It has the traditional name Mirach, which

is also spelled Merach, Mirac, Mirak. β Andromedae is located northeast of the Great

Square of Pegasus and is theoretically visible to all observers north of 54° S. The galaxy

NGC 404, also known as Mirach's Ghost, is visible seven arc-minutes away.

This star has an average apparent visual magnitude of 2.05, which makes it the brightest

star in the constellation. However, the luminosity varies slightly from magnitude +2.01 to

+2.10. Based upon parallax measurements, it is located at a distance of roughly 197 light-

years (60 parsecs) from Earth. The apparent magnitude of this star is reduced by 0.06 from

extinction caused by the gas and dust along the line of sight.

Beta Andromedae is a red giant with a stellar classification of M0 III. Since 1943, the

spectrum of this star has served as one of the stable anchor points by which other stars are

classified. It is suspected of being a semiregular variable star whose apparent visual magnitude

varies from +2.01 to +2.10. At this stage of the star's evolution, the outer envelope has

expanded to around 100 times the size of the Sun. It is radiating 1,995 times the luminosity of

the Sun at an effective temperature of 3,842 K.

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

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