NGC6819 (lowenthalm)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Foxhead Cluster · NGC 6819 · TYC3140-1475-1 · TYC3140-1505-1 · TYC3140-1544-1 · TYC3140-1688-1 · TYC3140-1726-1 · TYC3140-1755-1 · TYC3140-1908-1 · TYC3140-1919-1 · TYC3140-2049-1 · TYC3140-2191-1 · TYC3140-2243-1 · TYC3140-2348-1 · TYC3140-2351-1 · TYC3140-2401-1 · TYC3140-2537-1 · TYC3140-2645-1 · TYC3140-3046-1 · TYC3140-3080-1 · TYC3140-983-1 · V1274 Cyg · V1275 Cyg · V1440 Cyg · V2373 Cyg · V2376 Cyg · V2377 Cyg · V2378 Cyg · V2379 Cyg · V2380 Cyg · And 24 more.

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NGC6819

Acquisition type: Lucky imaging

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NGC6819

Acquisition type: Lucky imaging

This rich cluster of well over 100 stars in Cygnus is roughly 2800 parsecs away from us. I thought I would capture it while I was waiting for the the moon to set before imaging some dimmer targets.

The intensely red star in the lower right corner of the image is long period variable V1274 Cyg varying less in magnitude in a cycle of 210 days. I couldn't find any magnitude range measurements. The star is embedded in a dusty envelop of ejected carbon and oxygen that absorbs almost all of the light the star emits that s shorter than visible red wavelengths which gives it its saturated red color.

I resized the image to 50% of its original bin 1x1 scale. Each of the subs was composed of 120 one second exposures live stacked in SharpCap.

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	Distinct awarded users	Total awarded images
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	Image of the day	Top pick	Top pick nominations	Total submitted
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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	4768252
PixInsight job	4YTGZ7OCOCDUL7PUMNG3FW4UQY1XB7X0
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	19h41m16s.68
RA (top/left)	19h40m58s.37
RA (top/right)	19h40m03s.94
RA (bottom/right)	19h41m34s.81
RA (bottom/left)	19h42m29s.59

Dec (center)	+40°11′22″.1
Dec (top/left)	+40°26′53″.0
Dec (top/right)	+40°03′35″.7
Dec (bottom/right)	+39°55′49″.5
Dec (bottom/left)	+40°19′04″.2

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NGC6819

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NGC6819

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