Gem Cluster in Carina (Bruce Rohrlach)

Celestial hemisphere: Southern · Constellation: Carina (Car) · Contains: NGC 3293

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Gem Cluster in Carina

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Gem Cluster in Carina

This delightful open star cluster NGC 3293 (the Gem Cluster) is located in the constellation Carina, some 8000 light years distant, and wreathed in clouds of hydrogen +/- sulphur (magenta), hydrogen and oxygen (yellow) and sulphur (blue) in this HOS narrowband rendition. Around 100 stars brighter than 14th magnitude lie within a 10-arc-minute field, the brightest are a cluster of young blue supergiant stars that formed from the same molecular cloud around 6 million years ago.

One of the most populous stellar aggregates in the Carina Nebula region, it contains tens of relatively unevolved early B-class stars, along with a few blue and red supergiants. This stunning DSO lies immediately adjacent to Gabriel Mistral (NGC 3324) on the outskirts of the Carina Nebula.

Some 1000 star clusters have been identified in the Milky Way, and like this one, most are associated with extensive molecular gas clouds from which they condensed. The stars within these clusters are gravitationally bound.

Skywatcher 8 inch/f5 Newtonian, ASI1600mm Pro camera, NEQ6Pro tripod, CMOS chip pixel binning 2x2, Temp -20C, Unity Gain 139, Exposure - Hydrogen Alpha, Oxygen III and Sulphur II filters each 120 x 30 secs for a total integration image exposure of 3 hours (10pm-1.20am) as the telescope/camera tracked this feature as it crossed 45 degrees of sky (Lysterfield, Melbourne, Bortle 5).

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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
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	9262583
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Gem Cluster in Carina

Gem Cluster in Carina

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