NGC 6946 / Fireworks Galaxy / NGC 6939 (Ron Bokleman)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: NGC 6939 · NGC 6946

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NGC 6946 / Fireworks Galaxy / NGC 6939

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NGC 6946 / Fireworks Galaxy / NGC 6939

NGC 6946 (also known as the Fireworks Galaxy) is an intermediate spiral galaxy about 22 million light-years away, in the constellations of Cepheus and Cygnus.

It was discovered by William Herschel on 9 September 1798. Our line of sight in this direction crosses through dense stars and dust regions on the edge of the Milky Way. NGC 6946 is highly obscured by interstellar matter of the Milky Way galaxy, as it is quite close to the galactic plane.

The true diameter of the galaxy is approximately 40,000 light-years or just about one-third of the Milky Way's size.

In the past century, ten supernovae have been observed to explode in the arms of this galaxy, which has been classified as a starburst galaxy. Supernova 2017eaw, the 10th, is visible in the lower arm at about 4 o’clock.

Open cluster NGC 6939 is approximately 5,000 light-years away in the constellation Cepheus. The small, faint, horizontal galaxy in the middle left is cataloged as PGC64824.

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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
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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
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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	Advanced success
Started	...
Astrometry.net job	1685361
PixInsight job	WJC3U8BS44CO737JJ8V57PLYO7N8ZDHX
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	20h33m28s.414
RA (top/left)	20h28m21s.115
RA (top/right)	20h36m28s.799
RA (bottom/right)	20h38m39s.728
RA (bottom/left)	20h30m21s.531

Dec (center)	+60°24′17″.23
Dec (top/left)	+60°11′11″.30
Dec (top/right)	+59°50′52″.50
Dec (bottom/right)	+60°36′37″.18
Dec (bottom/left)	+60°57′25″.40

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NGC 6946 / Fireworks Galaxy / NGC 6939

NGC 6946 / Fireworks Galaxy / NGC 6939

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Image Index:

Contribution Index (beta):

NGC 6946 / Fireworks Galaxy / NGC 6939

NGC 6946 / Fireworks Galaxy / NGC 6939

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