Mimosa and Ruby Crucis, the Reddest Star in the sky (Leo Pires)

Celestial hemisphere: Southern · Constellation: Crux (Cru) · Contains: Becrux (β Cru) · The star Mimosa

Mimosa and Ruby Crucis, the Reddest Star in the sky, Leo Pires

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Mimosa and Ruby Crucis, the Reddest Star in the sky

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Mimosa and Ruby Crucis, the Reddest Star in the sky

DY Crucis (known as "Ruby Crucis") is a carbon star located in the constellation of Crux, The Southern Cross, near Mimosa (Beta Crucis). It is not part of the Crux constellation outline but is within the borders of the constellation. The star's spectral type is C, the reddest known. The radius of DY Crucis is 221.84 times bigger than the Sun. His effective temperature is 3,302 Kelvin which is cooler than our own Sun's effective temperature which is 5,777 Kelvin.

But what is a Carbon Star?

A carbon star is a giant star in a late phase of evolution. It is somewhat similar to a red giant but its atmosphere contains more carbon than oxygen. The star will grow in size because the outward pressure overrides the inward pressure.
Their atmospheres are full of carbon “soot” in the form of carbon and carbon compounds (CH, CN, C3,
SiC2). This soot reflects and scatters the shorter wavelengths of blue light but allows the longer
wavelengths of red light to filter through (much the same as what happens at sunset).

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 success
Started	...
Astrometry.net job	8126339
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Mimosa and Ruby Crucis, the Reddest Star in the sky

Mimosa and Ruby Crucis, the Reddest Star in the sky

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Image Index:

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Mimosa and Ruby Crucis, the Reddest Star in the sky

Mimosa and Ruby Crucis, the Reddest Star in the sky

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