vdB 141 - Ghost Nebula (Walter Koprolin)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep)

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vdB 141 - Ghost Nebula

Link: https://nightsky.at/Photo/Neb/vdB141_Newton.php

Powered byPixInsight

vdB 141 - Ghost Nebula

Link: https://nightsky.at/Photo/Neb/vdB141_Newton.php

Notes on image acquisition: I started taking this exposure series during my astrophoto expedition high up into the Austrian Alps in September 2020 and finished it at a more modest observation site two weeks later. The total exposure time adds to only 2.6 hours: Not much by my standards. The latter exposure series was cut short by the rising moon. All of the exposures were taken with my 9.5" Newtonian and a single-shot color camera without any filter.

Processing steps: File selection and bias/dark/flat calibration, star alignment and image integration, background flattening, photometric color calibration, noise reduction, star-background separation, local contrast enhancement, color saturation, star size reduction, re-adding of the stars, distortion correction.

Notes on image processing: Deconvolution did not work on the linear image for once, I could not create a suitable PSF with positive convergence. Pincushion distortion was apparent and corrected for.

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	4119003
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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vdB 141 - Ghost Nebula

vdB 141 - Ghost Nebula

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vdB 141 - Ghost Nebula

vdB 141 - Ghost Nebula

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