NGC 7640: An Irritated Galaxy (Alex Woronow)

Celestial hemisphere: Northern · Constellation: Andromeda (And) · Contains: NGC 7640 · PGC 3088080

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NGC 7640: An Irritated Galaxy

Powered byPixInsight

NGC 7640: An Irritated Galaxy

NGC 7640: An Irritated Galaxy

OTA: CDK17
Camera: FLI Proline 16803, 9micron pixels 0.64 arcsec/pxl
Observatory: Rodeo, NM (operated by Bernard Miller)

Exposures:
R: 16 x 900 sec
G: 16 x 900
B: 14 x 900
L: 23 x 1200 sec
Total Exposure time used: 19.2 hours
Image Width: 35 arcminutes

Processing Tools:
1.   Commercial: PixInsight, Topaz (Studio2, Photo AI2), Aurora HDR, Luminar Neo, 3DLUT Creator, PhotoDirector 365
2.   Pixinsight Addons: NoiseXTerminator, BlurXTerminator, StarXTerminator, Normalize Scale Gradient
3.   My Scripts: NB_Assistant, AC_Restar, Subframe Weighting Tool (Excel w/ J. Hunt)

Target Description:
This galaxy is a small barred-spiral galaxy (10 arcmin in length) in the constellation of Andromeda. It is seen nearly edge-on. It has active star-burst regions and, as seen in this image (the blue regions), is slightly bowed in shape probably both attributes attest to an encounter with other galaxies. Besides that scant information, not much has been written about this galaxy. It lies in the constellation of Andromedia and certainly plays second fiddle to the M31!"

Processing Description:
The one change to my standard processing is the inclusion of luminance into the image. In there normal role, luminance data do not contribute usefully to an image when a sufficiency of r, g, and b subs establish an image's color and brightness signals. This data set did not reach that point. Therefore, I replaced the stacked luminance carried in the r, g, and b channels with what is usually referred to as the super L. It was a new method I, and likely many others, discovered, and it worked!

Alex Woronow

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	8463995
PixInsight job	4QZJJ2J9ZCASUWBRD7YMNNKB192DWX0C
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	23h22m12s.626
RA (top/left)	23h24m15s.653
RA (top/right)	23h23m00s.120
RA (bottom/right)	23h20m08s.963
RA (bottom/left)	23h21m25s.636

Dec (center)	+40°51′12″.19
Dec (top/left)	+40°42′27″.100
Dec (top/right)	+41°14′24″.88
Dec (bottom/right)	+40°59′48″.10
Dec (bottom/left)	+40°27′57″.90

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NGC 7640: An Irritated Galaxy

NGC 7640: An Irritated Galaxy

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Image Index:

Contribution Index (beta):

NGC 7640: An Irritated Galaxy

NGC 7640: An Irritated Galaxy

Equipment

Acquisition details

Description

Comments

Sky plot

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