Barnard Galaxy (Los_Calvos)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: Barnard's Galaxy · HD186317 · HD186499 · LBN 83 · NGC 6822

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Barnard Galaxy

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Barnard Galaxy

NGC 6822 Barnard GalaxyForming part of the Local Group, NGC 6822 is an irregular dwarf galaxy similar to the Small Magellanic Cloud (SMC). At a distance of 1.5 Million of light year, (m − M)0 = 23.45 ± 0.15 mag it is the closest “independent” galaxy of this type beyond the Magellanic Clouds. Its close proximity and apparent isolation have made NGC 6822 a popular candidate for studies of galactic evolution, without the strong gravitational influences of other systems.The morphology of the galaxy can be broadly divided into three structural components ; firstly, a central bar which contains much of the young stellar population is clearly visible at optical wavelengths and is orientated almost in a north-south direction. This bar is embedded in a large envelope of neutral hydrogen oriented in a roughly SE-NW direction. Although this kind of HI structure is not unique in the Local Group – IC 1613 and IC 10 have similar structures – NGC 6822 is unusual in that the HI envelope is so much more extended than the main optical component. A third, halo-like structure made up of old- and intermediate age stars has been detected in 2002 and is approximately ~1 degree along the major axis. This elongated spheroidal structure is positioned orthogonally to and is dynamically decoupled from the HI envelope.Above the galaxy Hubble-V is an active star-forming region within galaxy NGC 6822. The cloud is about 200 light-years across and contains a dense knot of dozens of ultra-hot stars, each 100,000 times brighter than our Sun. In addition of the others HII regions in this field 18 NP and 9 HI regions have been located (see inverted image).

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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
Artificial satellite

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	Advanced success
Started	...
PixInsight job	VODYWXAM6OMA0B4Q0SFOLRLQA660ICAN
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	19h44m59s.860
RA (top/left)	19h46m38s.871
RA (top/right)	19h43m21s.881
RA (bottom/right)	19h43m18s.910
RA (bottom/left)	19h46m36s.624

Dec (center)	-14°47′52″.74
Dec (top/left)	-14°24′07″.54
Dec (top/right)	-14°23′30″.80
Dec (bottom/right)	-15°11′35″.92
Dec (bottom/left)	-15°12′13″.85

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