LDN 673 (Darius Kopriva)

Celestial hemisphere: Northern · Constellation: Aquila (Aql) · Contains: 25 Aql · 25 ome01 Aql · 29 Aql · 29 ome02 Aql · 31 Aql · 31 b Aql · LDN 673 · LDN 675 · LDN 676 · LDN 677 · LDN 683 · PK045-01.1 · PK046-01.1 · The star b Aql · The star ω1 Aql · The star ω2 Aql

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LDN 673

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LDN 673

LDN 673 is located in the constellation Aquila. This dark nebula is at a distance of about 600 light years. Expansive molecular clouds in the Aquila rift make the distant stars appear reddish, while the very dense LDN 673 nebula completely blocks the starlight.

As very often in dark nebulae, star formation is underway in LDN 673, as evidenced by the Herbig-Haro object HH32.

Right of center is GD 218, a small blue star moving very fast. This is a "white dwarf", a relatively low-mass star at the end of its life. Presumably such stars form from red giants, which eject their outer envelope, leaving the hot core. The high temperature is responsible for the color - white to blue - the small surface for the low luminosity. Its B-V index is 0.03, which fits very well to the blue color. The name is therefore somewhat misleading.

Southern Hemisphere Astro
Takahashi Epsilons
Astrophotography in Spain

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	Advanced success
Started	...
Astrometry.net job	5786387
PixInsight job	RSQHOY260EAJ29ET29V76M6IPEULFQFK
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	19h20m40s.92
RA (top/left)	19h25m33s.65
RA (top/right)	19h15m17s.12
RA (bottom/right)	19h15m50s.44
RA (bottom/left)	19h26m02s.87

Dec (center)	+11°08′05″.1
Dec (top/left)	+12°02′36″.3
Dec (top/right)	+11°50′34″.3
Dec (bottom/right)	+10°13′16″.1
Dec (bottom/left)	+10°25′19″.2

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LDN 673

LDN 673

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LDN 673

LDN 673

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