NGC 1232 The Eye of God Galaxy in RGB with Spectrophotometric Color Calibration (Ian Parr)

Celestial hemisphere: Southern · Constellation: Eridanus (Eri) · Contains: NGC 1232

NGC 1232 The Eye of God Galaxy in RGB with Spectrophotometric Color Calibration, Ian Parr

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NGC 1232 The Eye of God Galaxy in RGB with Spectrophotometric Color Calibration

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NGC 1232 The Eye of God Galaxy in RGB with Spectrophotometric Color Calibration

NGC 1232 is an intermediate size grand spiral galaxy about 61 million light-years away in the constellation Eridanus and was discovered by William Herschel in 1784.
It is about twice the size of our Milky Way and has an apparent magnitude of 10.9 and an an apparent size of 7.4 × 6.5 arc minutes.
It is dominated by millions of bright stars and dark dust, in spiral arms rotating about the centre.

It is a very late object for me right now so before summers heats up too much, I did manage to get one good night leaving the scope running to almost 4 am.

This my first effort with the new SpectrophotometricColorCalibration tool in Pixinsight which has to be a game changer for colour calibration in RGB.

The basic process steps after Weighted Batch processing were:

Normalised Scale Gradient, Drizzle, and Spectrophotometric Color Calibration on the Linear image.
Non-Linear conversion using Generalised Hyperbolic Stretch and StarXTerminator to separate the stars from the Galaxy.
I then ran StarExterminator again over the extracted stars again to get a Starless base image that is used for Star Reduction in PixelMath using Bill Blanshan's truly great script which has to be by far the best star reduction process I have found. Not too much to do after that with a very basic range mask on the galaxy and some Histogram and Curves Transformation on the separate galaxy and the background before recombining in Pixel Math and cleaning up.

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 success
Started	...
Astrometry.net job	6637790
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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NGC 1232 The Eye of God Galaxy in RGB with Spectrophotometric Color Calibration

NGC 1232 The Eye of God Galaxy in RGB with Spectrophotometric Color Calibration

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Image Index:

Contribution Index (beta):

NGC 1232 The Eye of God Galaxy in RGB with Spectrophotometric Color Calibration

NGC 1232 The Eye of God Galaxy in RGB with Spectrophotometric Color Calibration

Equipment

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Description

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