NGC 6781 (Frank Colosimo)

Celestial hemisphere: Northern · Constellation: Aquila (Aql) · Contains: NGC 6781 · PK041-02.1

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NGC 6781

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NGC 6781

NGC 6781 is a planetary nebula in the summer constellation of Aquila. This is an example of the end stage of a star too small to go supernova, such as our own Sun. After the hydrogen-fusing period of such a star ends, it will expand to a red giant during which it fuses helium to carbon and oxygen in its core. After it sheds its outer layers, forming a planetary nebula, it will leave behind a core, which is a white dwarf. This central star is visible in the image.

Date: Jul-Aug 2014 data collection, Mar 2020 processing

Location: Blue Mountain Vista Observatories,New Ringgold PA

Optics: Starizona Hyperion f/8 12.5 inch, FL 2540 mm on Paramount ME

Camera: Apogee U8300

Guiding: ST-402 on Innovations Foresight On-Axis Guider and STL-11000 Self guiding

Exposure: HaRGB: Ha:21x20 min R:13x8 min, G:23x4 min, B:23x11 min for a total of 14.5 hrs (80 subs at avg of 652 sec) Ha at bin 2, RGB bin 3

Processing: Image acquisition using CCD Autopilot. Initial processing was done using Maxim DL with subsequent processing with Photoshop. Ha data was blended with the R channel and used as the Luminance channel. Ha data was also added to the Red channel.

Northeast Imagers
Cloudy Nights
Schmidt-Cassegrain Telescope (SCT) Imagers

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
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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
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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	3339832
PixInsight job	4QB95STRSNITUZV3VSZRE9786EJZV102
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	19h18m25s.763
RA (top/left)	19h19m26s.632
RA (top/right)	19h18m16s.590
RA (bottom/right)	19h17m24s.881
RA (bottom/left)	19h18m34s.908

Dec (center)	+06°30′49″.43
Dec (top/left)	+06°32′47″.10
Dec (top/right)	+06°15′44″.56
Dec (bottom/right)	+06°28′50″.71
Dec (bottom/left)	+06°45′53″.11

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NGC 6781

NGC 6781

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NGC 6781

NGC 6781

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