C30 (NGC-7331) and Deer Lick Group plus Stephan's Quintet (Steve Argereow)

C30 (NGC-7331) and Deer Lick Group plus Stephan's Quintet

The majestic spiral galaxy Caldwell 30, also cataloged as NGC 7331, is often touted as an analog
to our own Milky Way, as its size, shape, and mass are similar to our galaxy’s. Caldwell 30’s starry
disk is inclined to our line of sight, so long telescopic exposures often result in images that evoke
a strong sense of depth.

Caldwell 30 is located about 45 million light-years away at the northern boundary of the constellation
Pegasus.  The galaxy is only about half a degree away from a group of five galaxies known as Stephan’s
Quintet. Caldwell 30 and the quintet may appear to be near each other in the sky, but the quintet is
actually about six times farther away from Earth.  Caldwell 30 was discovered in 1784 by famed
astronomer William Herschel.

Information Credits: NASA

Telescope: Explorer Scientific 127mm CF APO Refractor f/7.5 (952mm Focal Length)
Explore Scientific X0.7 Reducer f/5.25 (667mm Focal Length)
Mount IOptron CEM40
Camera ZWOASI6200MC-Pro Temp -10C, Binning 1 x 1, Gain 100 Offset 50
ZWO EFW

91 X 240 Second Exposures W/Optolong L-Pro Filter
30 Dark Frames/30 Flats
Total Integration Time: 6 Hours 4 Minutes
Acquisition with SharpCap
Stacked with Astro Pixel Processor
Guiding PHD2
Processed with Astra Image
Photo taken from Seven Lakes, NC Bortle 4.5

AstroBin Platform open discussions community forum
ZWO ASI 2600MC PRO

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	Basic failed
Started	...
Astrometry.net job	6351892
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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