Stephan's Quintet (Bill Dirks)

Celestial hemisphere: Northern · Constellation: Pegasus (Peg) · Contains: NGC 7317 · NGC 7318 · NGC 7319 · NGC 7320 · PGC 141039 · PGC 141041 · PGC 69260 · PGC 69279 · Stephan's Quintet

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Stephan's Quintet

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Stephan's Quintet

Well-known cluster of galaxies. The blueish galaxy is really a dwarf galaxy in the foreground. The other four are in the distance and are gravitationally interacting. Long streamers of stars are being torn off the galaxies by tidal forces.

In the wider field are several other distant galaxies.

By far my biggest project up to this time. Started with a color camera, and got a monochrome camera and filter wheel while in the process of capturing exposures. So two cameras were used. Captured images over seven nights. Wildfire smoke interrupted the project at one point. The final image uses color only from the monochrome camera and filter wheel. Instead of discarding the images from the color camera, I stacked them and converted the result to a luminance image and combined it with the luminance images from the monochrome camera.

All worth it; very happy with the final result.

The acquisition details above include all exposures. The final image used
L - 150 (of 225) frames x 300s @ Gain 100 @ -10C = 12h 30m exposure time
R,G,B - 36 (of 42) frames x 300s @ Gain 100 @ -10C = 3h 00m exposure time; each
Color - 111 (of 140) frames x 300s @ Gain 200 @ -10C = 9h 15m exposure time
30h 45m total exposure time

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	9034441
PixInsight job	8MBKDNL3LFJNOSSM1JCIIAW8Z9CMZAUJ
PixInsight queue size	n/a
PixInsight stage	END_TASK

RA (center)	22h35m57s.695
RA (top/left)	22h35m07s.510
RA (top/right)	22h35m07s.860
RA (bottom/right)	22h36m47s.641
RA (bottom/left)	22h36m47s.712

Dec (center)	+33°58′00″.13
Dec (top/left)	+34°08′46″.37
Dec (top/right)	+33°47′10″.62
Dec (bottom/right)	+33°47′12″.55
Dec (bottom/left)	+34°08′48″.70

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Stephan's Quintet

Stephan's Quintet

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Image Index:

Contribution Index (beta):

Stephan's Quintet

Stephan's Quintet

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

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