Dumbbell Nebula, M27 (NGC 6853) (BrettWaller)

Celestial hemisphere: Northern · Constellation: Vulpecula (Vul) · Contains: Dumbbell nebula · M 27 · NGC 6853 · The star 14Vul

Dumbbell Nebula, M27 (NGC 6853), BrettWaller

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Dumbbell Nebula, M27 (NGC 6853)

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Dumbbell Nebula, M27 (NGC 6853)

M27 is a magnificent Type 3+2 planetary nebula lying just south of 14 Vulpeculae, magnitude 5.7. Known popularly as the Dumbbell Nebula, it spans 7 x 6 arc minutes on the sky with a combined magnitude of 7.3. It is one of the closer planetary nebulae at a distance of 815 light years, and is approximately 1.2 l.y. across. The gas comprising the nebula was ejected 48,000 years ago from the blue-dwarf star at its center which shines at a magnitude of 13.8. UV radiation from the central dwarf star powers the luminance of the expanding gas shells.

Calibration with dark frames of identical exposure, along with sky flats and matched dark frames. Processed in Pixinsight as follows:

Drizzle Integration with Local Normalization

AutomaticBackgroundExtraction on separate RGB planes

PhotometricColorCalibration

MultiscaleLinearTransform of chrominance

MaskedStretch

MorphologicalTransformation with StarMask

TGVDenoise

CurvesTransformation

Cropped and converted to JPG for upload. Rotated to a North-up orientation.

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	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
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Star trails
Northern lights
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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
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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	3167054
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Dumbbell Nebula, M27 (NGC 6853)

Dumbbell Nebula, M27 (NGC 6853)

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Dumbbell Nebula, M27 (NGC 6853)

Dumbbell Nebula, M27 (NGC 6853)

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